[Abbreviated Firing Tables] [From the U.S. Government Publishing Office, www.gpo.gov] TM 6-215 Document Reserve WAR DEPARTMENT TECHNICAL MANUAL ABBREVIATED FIRING TABLES December 15,1941 NON-CIRCULATING N I LlU»VC\r(Y *TM 6-215 1-2 TECHNICAL MANUAL No. 6-215 WAR DEPARTMENT, Washington, December 15, 1941. ABBREVIATED FIRING TABLES Prepared under direction of the Chief of Field Artillery Paragraphs Pages. Section I. General 1-8 1-12' II. Tables common to all weapons________________ 13-17 III. Firing tables, 75-mm gun____________________ 18-38; IV. Firing tables, 155-mm howitzer_______________ 39-58; Appendix I. Condensed table of maximum ordinates (feet)__ 59 II. Equivalent erosion effects__________________ 60 Section I GENERAL Paragraph General__________________________________________________________________ 1 Scope____________________________________________________________________ 2 Purpose__________________________________________________________________ 3 Arrangement______________________________________________________________ 4 Explanation of tables____________________________________________________ 5 The metro message________________________________________________________ 6 Computation of metro corrections; type problem___________________________ 7 Selection of appropriate charge__________________________________________ 8 1. General.—Firing tables contain data, pertinent to the applica-cation of fire, based on standard trajectories for each type of weapon and combination of projectile, fuze, and propelling charge. A standard traj ectory is the one theoretically existing under known, arbitrarily selected conditions of weather, position, and materiel. The amount of important variance that may be expected in a trajectory fired under conditions differing from standard may be computed from the values listed in the tables. 2. Scope.—The tables contained herein are extracts from Firing Tables 75-B-4 for the 75-mm gun Ml897 (and modifications), and from Firing Tables 155-D-2 for the 155-mm howitzer M1917, M1917A1, M1918, and M1918A1. Of the various combinations of projectile, fuze, and charge available for these weapons, there have *This manual supersedes TM 6-215, November 27, 1940, and Training Circular No. 22, War Department.. 1941. 424342°—41---1 TM 6-215 2-5 FIELD ARTILLERY been included herein three combinations for the 75-mm gun and four combinations for the 155-mm howitzer. 3. Purpose.—The purpose of this manual is to present information and instruction regarding firing tables. For the 75-mm gun, the manual includes sufficient data for the solution of problems involving selection and application of the appropriate combination of projectile and fuze for various missions; for the 155-mm howitzer, sufficient data to enable the student to select and apply the appropriate combination of fuze and charge for HE shell, within the usual ranges for division artillery. 4. Arrangement.—a. Section I contains an explanation of the tables and instructions for their use. b. Section II contains data applicable to any combination of projectile, charge, and fuze. In it are found— (1) Conversion factors. (2) Natural trigonometric functions of angles in mils. (3) s and d tables. (4) Wind-components table. (5) Tables and formulas for reducing temperature and density at the altitude of the meteorological datum plane to those at the altitude of the battery. (6) Conversion table, degrees and minutes to mils. c. Section III contains tables for the 75-mm gun. It is divided into three parts: one part contains data for shrapnel, Mk. I; the other two, data for HE shell, Mk. I, point detonating fuzes M46 and M47, reduced charge and normal charge, respectively. Each part contains three tables: A, B, and C. (1) Table A contains information as to certain elements of a standard trajectory, range and deflection effects of differences from standard, and correction for the angle of site. (2) Table B gives the change in muzzle velocity due to variations in the temperature of the powder. (3) Table C gives the deflection effect for cant of axle. (The correction for this effect is not necessary for weapons equipped with sights having cross-leveling bubbles.) d. Section IV contains tables for the 155-mm howitzer. It is divided into four parts containing data for HE shell, Mk. I, point detonating fuzes M46 and M47, charges 3, 4, 5, and 6, respectively. Each part consists of three tables: A, B, and C, containing data as explained in c(l), (2), and (3) above. 5. Explanation of tables.—The tables in section II are self-explanatory. The tables of sections HI and IV are explained below. 2 TM 6-215 5 ABBREVIATED FIRING TABLES a. Table A.—This explanation is based upon table A for the 75-mm gun firing HE shell, Mk. I, normal charge, fuzes M46 and M47. An explanation of the variations between this table and the table for other combinations of projectile, fuze, and charge is given in d below. (1) Column 1.—The range in yards for each hundred yards. The range given in these tables is regarded as measured along the surface of a sphere concentric with the earth and passing through the muzzle of the piece. For practical purposes, the range may be considered as measured along a horizontal plane passing through the piece. All effects, throughout a computation, are based on this range (to the nearest hundred yards). The determination of one effect is not based upon a range corrected for another effect. For example, the map range being 4,123, a range of 4,100 would be used throughout the computation as an argument in entering the tables, although the elevation for the map range, 4,123, would be determined to the nearest mil, by interpolation. The algebraic sum of all range corrections is converted to mils of elevation and applied to this map-range elevation, as is the site. (2) Column 2.—The elevation in mils for the range shown in column 1. (3) Column 3.—The fork in mils of elevation. (The fork is the change in elevation for four-probable-errors change in range.) (4) Column If.—The change in elevation for a 100-yard change in range. (This is c. It applies to ranges within 50 yards of the tabulated range.) (5) Column 5.—The change in range for a 1-mil change in elevation. (Often referred to as “yards per mil.” Applies to ranges within 50 yards of tabulated range.) (6) Column 6.—The time of flight to the level point. (7) Column 7.—The probable error in range. (The symbol for range probable error is epr.) (8) Column 8.—The probable error in deflection. (The symbol for deflection probable error is eDd.) (9) Column 9.—The slope of fall (the tangent of the angle of fall), expressed as 1/a, where 1 is the vertical distance and a is the horizontal distance. (10) Column 10.—The line number of metro message. This is the initial digit of that seven-figure group which is to be used for the particular range. The seven-figure group on this line contains those data appropriate for the maximum ordinate of the range considered. The maximum ordinate is not given in table A. Its value in feet may be approximated by squaring the time of flight and multiplying by four. A condensed table of maximum ordinates is given in appendix I. 3 TM 6-215 5 FIELD ARTILLERY (11) Column 11.—The deflection effect oj drift. The effect given in these tables includes side jump. Drift proper is always to the right, but the included left side-jump effect exceeds the drift effect in the shorter ranges. (Although a standard trajectory has drift, for convenience drift is considered a deflection effect.) (12) Column 12.—The deflection effect oj a cross wind of 1 mile per hour. The direction of the effect is given in the wind-components table. A wind from the right causes a left effect; a wind from the left, a right effect. (See wind-components table and description of metro message.) (13) Columns 12 and 15 to 19, inclusive.—In columns 12 and 15 to 19 are given the effects oj a unit increase above standard in materiel and weather conditions. Range effects of a unit decrease below standard in materiel and weather conditions are equal in value but opposite in sign to the effects shown in the table. A condition causing the trajectory to have greater range than standard has a plus range effect; one causing the trajectory to fall shorter than standard has a minus range effect. A condition causing the trajectory to fall to the right of a standard trajectory has a right deflection effect; one causing it to fall to the left, a lejt deflection effect. The range, usually measured from a map or firing chart, is one of the known values or arguments used in determining these effects. It is taken to the nearest 100 yards. (14) Columns 13 and 14-—The correction which must be applied to each mil of computed angle of site to compensate for the nonrigidity of the trajectory. It is given to the nearest hundredth of a mil. (15) Column 15.—The range effect of an increase of one cross (or square) above standard in weight of projectile. (See table of projectile weights.) For example, a 75-mm HE shell of weight “4 crosses” is two crosses above standard (2), giving an effect twice as great as the unit effect shown in the table and of the same sign; a 155-mm HE shell of weight “1 square” is three squares below standard (4), giving an effect three times as great as the unit effect shown in the table and of opposite sign. (16) Column 16.—The range effect of an increase of muzzle velocity of 1 foot per second above standard. The sign of the effect is the same as the sign of the variation. (See table B.) (17) Column 17.—The range effect of an increase in air temperature of 1° above standard (59° F.). (18) Column 18.—The range effect of a rear wind of 1 mile per hour. The sign of the effect is the same as that of the range component. 4 TM 6-215 5 ABBREVIATED FIRING TABLES (19) Column 19.—The range effect of an increase in air density of 1 percent above standard (100%). (20) Column 20.—The range setting to be placed on the range scale of a piece firing from the Ml897 carriage (and the modifications thereof) in order to reach the range given in column 1. (21) Column 21.—The range setting similarly required when firing from the M2 carriage. (22) Column 1.—Range. Same as in column 1 on left side; repeated for convenience. b. Table B.—This table gives the change in muzzle velocity due to variation in the powder temperature. Whenever possible the actual temperature of the powder should be taken. With fixed ammunition the temperature of the place where the ammunition is stored at the battery is used. If the temperature cannot be taken at the battery, the air temperature given in the metro message, corrected for the altitude of the battery position, is used as a guide. With the effect obtained from this table, the column headed “Range effect of increase of—One foot per second in MV” in table A is entered to obtain the final effect in range. c. Table C.—This table gives the deflection effect of 10-mils cant of the carriage axle. The effect of any other amount is proportional. The correction is applied to individual pieces by the executive. d. Variations in tables.—Tables B and tables C are similar in form for all combinations of projectile, fuze, and charge. Variations in tables A from the arrangement described in a above are described below. (1) 75-mm gun firing shrapnel, Mk. I, 21-second combination fuze.— Table A contains four additional columns showing— (a) Column 9.—The probable error in height of burst, expressed in mils. (6) Column 21.—The fuze setting, in seconds, to produce a graze burst. (c) Columns 22 and 23.—The displacement of the burst resulting from a change of five points in the corrector. (d) No column of data is given for effect of weight of projectile. (2) 155-mm howitzer, firing HE shell, Mk. I, fuzes Mlfi and M47.—Separate tables are required for each of the seven charges of propelling powder used with this materiel. The tables are the same as those described in a above except that columns 20 and 21 (range settings) do not apply and are therefore omitted. 5 TM 6-215 6 FIELD ARTILLERY 6. The metro message.—a. The metro message is a coded tabulation of meteorological conditions, on the surface of the earth and at varying zones above it, for use by the Field Artillery in applying these meteorological effects to its firing data. It consists of a group of three letters to designate the sending station, followed by one five-figure group and a series of seven-figure groups, as explained by the table which follows. If the first figure of the five-figure group is 2, the message applies to antiaircraft or other high-angle fire; if the first figure is 3, the message applies to Field Artillery. b. (1) (2) Example of metro Explanation message MIFMIF 31256 ' The letter M indicates a metro message; the letters IF are the code designation of the sending station. (The group is usually repeated as indicated.) The figure 3 indicates a metro message for the Field Artillery; 12 indicates that the MDP (meteorological datum plane) is 1,200 feet above sea level; 56 indicates that the temperature at the MDP is 56° F. (3) (4) (5) (6) (7) Zones in height (feet) Line of metro message Azimuth of wind (mils) Velocity of wind (m/h) Density (percent) 0320802 Surface 0 3,200 8 102 1351101 Surface to 600 1 3,500 11 101 2371499 600 to 1,500 2 3,700 14 99 3401598 1,500 to 3,000 3 4,000 15 98 4441697 3,000 to 4,500 4 4,400 16 97 5481896 4,500 to 6,000 5 4,800 18 96 6502195 6,000 to 9,000 6 5,000 21 95 7532295 9,000 to 12,000 7 5,300 22 95 8562495 12,000 to 15,000 8 5,600 24 95 9622795 * 15,000 to 18,000 9 6,200 27 95 The tabulation above explains the seven-figure groups. The first figure of each group gives the line number of the metro message, column (4). (Also see column 10, table A.) The second and third figures, explained in column (5), give the azimuth of the direction from which the ballistic wind blows, measured ♦Each additional line refers to an additional 6,000-foot zone in height. 6 ABBREVIATED FIRING TABLES TM 6-215 6-7 clockwise from the true North, in hundreds of mils. In computations this is usually assumed to be the same as F-North. The fourth and fifth figures give the velocity of the ballistic wind, column (6). The sixth and seventh figures, explained in column (7), give the ballistic density in percentage of standard. If greater than standard the first digit does not appear in the metro message; for example, 02 would mean 102, or an increase of 2 percent above normal, while 98 means a decrease of 2 percent below normal. This density must be corrected for the difference in altitude between the battery and MDP by means of the table for correcting density (page 17). The density is the mean effective density for the whole layer of atmosphere having a thickness equal to the height given. c. Further explanation of the use of the metro message appears in paragraph 7. 7. Computation of metro corrections; type problem.—a. General procedure.—To compute metro corrections quickly and reliably it is necessary to follow a procedure that is systematic and orderly. Much of the work (such as determining the uncorrected direction and quadrant elevation, ascertaining from the battery executive the weight of projectile and temperature of powder, and listing all effects due to materiel) can usually be done in advance, leaving only a few simple, planned operations to be performed upon receipt of the metro message. The tables are so arranged as to facilitate this. Note that for a given target nearly all matter to be extracted from the tables appears on a single line, namely that line of table A which is identified by the map range (to nearest 100 yards). b. Example.—For the 75-mm gun M2 firing HE shell Mk. I, normal charge, fuze M46, to determine the corrections in direction and range for a single check point: (1) Record map data from firing chart (map, wide angle photo, or grid sheet): Map range (to nearest 10 yards) =4,780 yards Altitude of check point (target) =1,665 feet Altitude of battery =1,505 feet Map shift (from base point) =BDR 50 Direction of fire (F-azimuth taken to nearest 100 mils) =4,900 7 TM 6-215 7 FIELD ARTILLERY (2) Determine the elevation for range. From table A (column 2) note the elevations corresponding to 4,700 (168.2) and 4,800 (174.4). For range 4,780 interpolate as follows: Elevation corresponding to 4,700 =168.2 80/100X (174.4-168.2) 1 = 5.0 Elevation corresponding to 4,780 =173.2 (use 173) (3) Compute the site. The target is 160 feet above the battery, giving a difference in altitude of +53 yards (minus when target is below guns). For range 4,800 (nearest 100 yards) the site is +53/4.8 or +11 mils. To correct the site (nonrigidity of trajectory) enter table A, line 4,800 and column 13, and note that for each +1 mil angle of site the correction is +0.05 mil. The complementary angle of site is, then, 11X(+O.O5) or +0.55 mil. This is taken as 1 mil (nearest mil), making the corrected site +12 mils (11 + 1). (Alternative method: Compute the corrected site directly by multiplying +11 by 1.05. This method adapts itself to slide-rule computation. The factor 1.05 is the numerical, not the algebraic, sum of unity plus the site correction for 1 mil.) (4) The quadrant elevation is the algebraic sum of the corrected site and the elevation for range: Elevation for range 4,780 ((2) above) 173 mils Corrected site ((3) above) +12 Quadrant elevation 185 mils (5) The battery executive reports that: The weight marking on the projectiles is+ + +, or one cross above standard (par. 5a (15)). The powder temperature is 40° F. Now enter table B and note that a powder temperature of 40° changes the muzzle velocity from standard by —22 f/s. (6) Enter table A, line 4,800 and column 10, and note that the metro message line number that will apply is 2. 1 Instead of making this subtraction it is equally good practice to use the value c, found in column 4. 8 TM 6-215 7 ABBREVIATED FIRING TABLES (7) The following metro message has been received: MIF MIF 3 12 35 0 57 25 97 1 59 27 96 2 59 29 96 3 60 32 95 4 60 33 95 The pertinent parts of the metro message are— 3 12 35 2 59 29 96 3 (Message applies to Field Artillery.) 12 (Altitude of MDP is 1,200 feet.) 35 (Air temperature at MDP is 35° F. This must be corrected to level of battery. See (8) below.) 2 (Line number that applies. See (6) above.) 59 (Ballistic wind blows from F-azimuth 5,900.) 29 (Velocity of ballistic wind is 29 mph.) 96 (Ballistic density at MDP is 96 percent of standard. This must be corrected to level of battery. See (8) below.) (8) Correct the air temperature and density to the level of the battery, using the corrected-density-and-temperature table and notes pertaining thereto on page 17. Battery is 300 feet above MDP (1,505—1,200). Corrected temperature=35—(0.2X3) =34.4°. (Use 34°.) Corrected density =96—(0.3X3) =95.1 percent. (Use 95 percent.) (9) The variations from standard are now found to be: Variation in weight of projectile—3 (actually + + +)—2 (+ + is standard) = + l. (Par. 5a(15) Temperature variation=34° (at battery)—59° (standard) = —25°. (Par. 5a(17).) Density variation=95 percent (at battery) —100 percent (standard) = —5 percent. (Par. 5a(19).) 9 TM 6-215 7 FIELD ARTILLERY (10) Determine chart direction of wind: Wind direction ((7) above) (add 6,400 if necessary) =5, 900 Minus direction of fire ((1) above) =4, 900 Chart direction 1, 000 (11) Determine the wind components: Enter the wind-components table, page 16, with chart direction 1,000 ((10) above) and note that for a wind of 1 mph the cross wind is left 0.83 mph and the range wind is—0.56 mph. Multiplying these factors by 29,. the reported wind velocity ((7) above), the cross wind is found to be left 24 mph and the range wind—16 mph. Note.—The foregoing paragraphs contain the preliminary ground work necessary for determining the corrections for direction and range. Those that follow show in detail how to determine and apply these corrections. (12) Compute the weather (cross-wind) correction, combine it with the drift correction, and apply the net correction thus determined to the map shift. To compute the weather effect multiply the cross wind of left 24 mph ((11) above) by the effect in mils of deflection (0.4 mil in this case—table A, line 4,800, column 12) of a cross wind of 1 mph. The result (left 9.6) taken to the nearest mil is left 10. Factor Effect Correction Drift (table A, line 4,800, column 11) Weather (cross wind) Right 5 Left 5 Left 10 Right 10 Net correction Map shift Net correction • Right 5 BD Right 50 Right 5 Corrected direction = BD Right 55 10 TM 6—215 ABBREVIATED FIRING TABLES 7 (13) Calculate the net combined effect (in yards) of the various factors affecting range. The effect of any single factor is the product of its variation from standard by its unit effect in yards. The sign of the effect is that of the algebraic product. (Plus X plus = plus; minus X minus = plus; plus X minus = minus; zero X either plus or minus = zero.) The unit effects appear in table A, line 4,800, columns 15 to 19 inclusive, in an order which should be followed in tabulating the factors. Convert the net combined effect to a correction (in yards) by changing its sign, then convert the latter (which for most purposes is not in a usable form) into a correction in mils of quadrant elevation by dividing it by “ yards per mil” (table A, line 4,800, column 5). Column Variation Unit Range effect No. * actor from standard effect (yds) + — 15 Weight of projectile ((9) above) + 1 (cross) + 13 13 16 Powder temperature ((5) above) —22 (f/s) + 2. 1 46 17 Air temperature ((9) above) —25 (degrees) + 1.8 45 18 Range wind ((11) above) —16 (mph) + 5.7 91 19 Density ((9) above) — 5 (percent) -18 90 Totals of effects (yards)________________________+ 103 —182 Net effect (yards) (+103 — 182)__________________ = —79 Net correction (yards)___________________________ = +79 Yards per mil at 4,800 (table A, column 5) = 16 Elevation correction (mils) ( + 79/16)_______________ = +5 Uncorrected quadrant elevation (par. (4) above) 185 Elevation correction_______________________________ +5 Corrected quadrant elevation______________________ 190 11 TM 6-215 8 FIELD ARTILLERY 8. Selection of appropriate charge.—a. With the 155-mm howitzer, the propelling charge appropriate for use depends upon the range. A given range-line can usually be reached by more than one charge. The heavier the charge the greater the erosion of the bore. The lighter the charge the steeper the angle of fall and, in general, the greater the dispersion. Selecting too light a charge may necessitate stopping an adjustment and starting anew with a heavier charge. A registration made near the long limit of a charge will be useless for transfers to targets at greater ranges. b. Mark each table A to indicate 75 percent and 85 percent, respectively, of the maximum range of its charge. For observed fires the charge selected should be such that the computed range to the target is not greater than 75 percent of the maximum range for that charge. Subject to these restrictions, select the lightest charge possible. Example: Adjust on a check point at range 6,600 with shell Mk. I, fuze M46. The maximum initial ranges for adjustment with charges 4, 5, and 6 (indicated in each case by the 75-percent mark in the appropriate table A) are, respectively, 5,250, 6,800, and 8,250. Charge 4 is manifestly too light. Charge 6 is needlessly heavy. Charge 5, then, is the proper selection. c. For unobserved fires that are prepared from an accurate firing chart a charge can be used up to 85 percent of its maximum range without serious impairment of accuracy by dispersion. 12 TM 6-215 ABBREVIATED FIRING TABLES Section II TABLES COMMON TO ALL WEAPONS CONVERSION FACTORS 1 yard___= 0.9144 meters 1 meter. _ = 1.0936 yards 1°_____= 17.7778 mils 1'_______= 0.2963 mils 1 mil____= 0.0563° 1 mil____= 3.375' NATURAL FUNCTIONS OF ANGLES IN MILS Mils sin cos tan cot Mils sin cos tan cot 0 . 0000 1. 0000 .0000 1600 400 . 3827 .9239 .4142 2.414 1200 10 . 0098 1. 0000 . 0098 101.9 90 10 . 3917 . 9201 . 4258 2. 349 90 20 . 0196 .9998 . 0196 50. 92 80 20 .4008 .9162 .4374 2. 286 80 30 . 0295 . 9996 . 0295 33. 94 70 30 . 4097 . 9122 .4492 2. 226 70 40 . 0393 . 9992 . 0393 25. 45 60 40 .4187 .9081 . 4610 2. 169 60 50 . 0491 .9988 . 0491 20. 36 50 50 .4276 . 9040 . 4730 2. 114 50 60 . 0589 .9983 . 0590 16. 96 40 60 .4364 .8998 . 4850 2. 062 40 70 . 0687 .9976 . 0688 14. 53 30 70 .4452 .8954 . 4972 2. 011 30 80 . 0785 .9969 . 0787 12.71 20 80 . 4540 . 8910 .5095 1. 963 20 90 . 0882 . 9961 . 0886 11.29 10 90 .4627 .8865 .5220 1. 916 10 100 . 0980 . 9952 . 0985 10. 15 1500 500 .4714 . 8819 . 5345 1.871 1100 10 . 1078 . 9942 . 1084 9. 224 90 10 .4800 .8773 .5472 1.827 90 20 . 1175 .9931 . 1184 8. 449 80 20 .4886 . 8725 .5600 1.786 80 30 . 1273 . 9919 . 1283 7. 793 70 30 .4972 . 8677 .5730 1.745 70 40 . 1370 . 9906 . 1383 7. 230 60 40 .5057 . 8627 .5861 1. 706 60 50 . 1467 . 9892 . 1483 6. 741 50 50 . 5141 .8577 .5994 1.668 50 60 . 1564 . 9877 . 1584 6. 314 40 60 .5225 .8526 . 6128 1. 632 40 70 . 1661 . 9861 . 1685 5. 936 30 70 .5308 .8475 . 6264 1.596 30 80 . 1758 .9844 . 1786 5. 600 20 80 .5391 . 8422 . 6401 1. 562 20 90 . 1855 . 9827 . 1887 5. 299 10 90 .5474 .8369 . 6541 1.529 10 200 . 1951 .9808 . 1989 5. 027 1400 600 .5556 .8315 . 6682 1.497 1000 10 . 2047 . 9788 . 2091 4. 781 90 10 .5637 .8260 . 6825 1.465 90 20 . 2143 .9768 . 2194 4. 558 80 20 .5718 .8204 . 6970 1. 435 80 30 . 2239 .9746 .2297 4. 353 70 30 .5798 .8148 .7117 1.405 70 40 .2335 .9724 . 2401 4. 165 60 40 .5878 .8090 .7265 1. 376 60 50 .2430 .9700 . 2505 3. 992 50 50 .5957 . 8032 .7417 1. 348 50 60 . 2525 . 9676 . 2610 3. 832 40 60 . 6036 . 7973 .7570 1.321 40 70 .2620 . 9651 .2715 3. 684 30 70 . 6114 .7914 .7725 1.294 30 80 . 2714 .9625 . 2820 3. 546 20 80 .6191 .7853 . 7883 1.268 20 90 . 2809 .9597 . 2927 3. 417 10 90 .6268 .7792 .8044 1.243 10 300 .2903 .9569 . 3034 3. 297 1300 700 . 6344 .7730 . 8207 1. 219 900 10 .2997 . 9540 . 3141 3. 184 90 10 . 6420 .7667 . 8372 1. 194 SO 20 . 3090 .9511 . 3249 3. 078 80 20 . 6495 .7604 . 8541 1. 171 80 30 . 3183 . 9480 . 3358 2. 978 70 30 . 6569 .7540 .8712 1. 148 70 40 . 3276 .9448 . 3468 2. 884 60 40 . 6643 . 7475 . 8886 1. 125 60 50 .3369 .9415 . 3578 2. 795 50 50 . 6716 .7410 . 9064 1. 103 50 60 . 3461 .9382 . 3689 2. 711 40 60 . 6788 . 7343 .9244 1. 082 40 70 . 3553 .9348 . 3801 2. 631 30 70 . 6860 .7276 . 9428 1.061 30 80 . 3645 . 9312 . 3914 2. 555 20 80 . 6931 .7209 .9615 1.040 20 90 . 3736 .9276 .4028 2. 483 10 90 .7001 .7140 .9806 1. 020 10 400 . 3827 . 9239 .4142 2.414 1200 800 .7071 .7071 1. 0000 1. 000 800 COS sin cot tan Mils cos sin cot tan Mils 13 TM 6-215 FIELD ARTILLERY EXPLANATION OF s AND d TABLES G G is the gun. O is the observer. T is the target. It is also the angle T (OTG} (often referred to as the observer displacement and as the target offset in mils). R is range GT in thousands of yards. r is the distance OT in thousands of yards. d is the deviation, as seen from 0, caused by a range change of 100 yards (an elevation change of one c). Its value depends on the values of T and r. s is the shift in deflection necessary to keep a shot on the OTline when making a range change of 100 yards (an elevation change of one c). s Table Range GT in yards T in mils 100 200 300 400 500 600 700 800 900 1000 1100 1150 1200 1250 1300 2000 5 10 15 21 27 34 42 51 62 76 95 108 123 142 168 2100 5 10 15 20 26 32 40 49 59 73 91 103 117 136 160 2200 5 9 14 19 25 31 38 46 56 69 87 98 112 129 153 2300 4 9 13 18 24 30 36 44 54 66 83 94 107 124 146 2400 4 8 13 18 23 28 35 42 52 64 79 90 102 119 140 2500 4 8 12 17 22 27 33 41 50 61 76 86 98 114 134 2600 4 8 12 16 21 26 32 39 48 59 73 83 95 109 129 2700 4 8 11 16 20 25 31 38 46 56 71 80 91 105 124 2800 4 7 11 15 19 24 30 36 44 54 68 77 88 102 120 2900 3 7 11 15 19 23 29 35 43 53 66 74 85 98 116 3000 3 7 10 14 18 23 28 34 41 51 64 72 82 95 112 3200 3 6 10 13 17 21 26 32 39 48 60 67 77 89 105 3400 3 6 9 12 16 20 25 30 37 45 56 63 72 84 99 3600 3 6 9 12 15 19 23 28 34 42 53 60 68 79 93 3800 3 5 8 11 14 18 22 27 33 40 50 57 65 75 88 4000 3 5 8 11 14 17 21 25 31 38 48 54 61 71 84 4500 2 5 7 9 12 15 19 23 28 34 42 48 55 63 75 5000 2 4 6 8 11 14 17 20 25 31 38 43 49 57 67 5500 2 4 6 8 10 12 15 19 23 28 35 39 45 52 61 6000 2 3 5 7 9 11 14 17 21 25 32 36 41 47 56 6500 2 3 5 6 8 10 13 16 19 23 29 33 38 44 52 7000 1 3 4 6 8 10 12 15 18 22 27 31 35 41 48 7500 1 3 4 6 7 9 11 14 17 20 25 29 33 38 45 8000 1 3 4 5 7 9 10 13 16 19 24 27 31 36 42 8500 1 2 4 5 6 8 10 12 15 18 22 25 29 33 40 9000 1 2 3 5 6 8 9 11 14 17 21 24 27 32 37 9500 1 2 3 4 6 7 9 11 13 16 20 23 26 30 35 10000 1 2 3 4 5 7 8 10 12 15 19 22 25 28 34 14 TM 6-215 ABBREVIATED FIRING TABLES d Table Distance OTin yards T in mils JOO 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1000 10 20 30 39 48 57 65 72 79 85 90 94 97 1100 9 18 27 35 44 51 59 65 72 77 82 86 89 1200 8 17 25 32 40 47 54 60 66 71 75 78 81 1300 8 15 23 30 37 44 50 55 61 65 69 72 75 1400 7 14 21 28 34 40 46 51 56 60 64 67 70 1500 7 13 20 26 32 38 43 48 52 56 60 63 65 1600 6 12 18 24 30 35 40 45 49 53 56 59 61 1700 6 12 17 23 28 33 38 42 46 50 53 55 57 1800 6 11 16 22 27 31 36 40 44 47 50 52 54 1900 5 10 16 21 25 30 34 38 41 45 47 50 51 2000 5 10 15 20 24 28 32 36 39 42 45 47 49 2100 5 9 14 19 23 27 31 34 37 40 43 45 46 2200 5 9 13 18 22 26 29 33 36 38 41 43 44 2300 4 9 13 17 21 25 28 31 34 37 39 41 42 2400 4 8 12 16 20 24 27 30 33 35 37 39 41 2500 4 8 12 16 19 23 26 29 31 34 36 38 39 2600 4 8 11 15 18 22 25 28 30 33 35 36 37 2700 4 7 11 14 18 21 24 27 29 31 33 35 36 2800 4 7 11 14 17 20 23 26 28 30 32 34 35 2900 3 7 10 13 17 20 22 25 27 29 31 32 34 3000 | M 7 10 13 16 19 22 24 26 28 30 31 32 3200 3 6 9 12 15 18 20 23 25 26 28 29 30 3400 3 6 9 11 14 17 19 21 23 25 26 28 29 3600 3 6 8 11 13 16 18 20 22 24 25 26 27 3800 3 5 8 10 13 15 17 19 21 22 24 25 26 4000 2 5 7 10 12 14 16 18 20 21 22 24 24 4500 2 4 7 9 11 13 14 16 18 19 20 21 22 5000 2 4 6 8 10 11 13 14 16 17 18 19 19 5500 2 4 5 7 9 10 12 13 14 15 16 17 18 6000 2 3 5 6 8 9 11 12 13 14 15 16 16 6500 2 3 5 6 7 9 10 11 12 13 14 14 15 7000 1 3 4 6 7 8 9 10 11 12 13 13 14 7500 1 3 4 5 6 8 9 10 11 11 12 13 13 8000 1 2 4 5 6 7 8 9 10 11 11 12 12 15 TM 6-215 FIELD ARTILLERY WIND COMPONENTS FOR 1-MILE-PER-HOUR WIND Chart direction of wind Cross wind mph Range wind mph Chart direction of wind Cross wind mph Range wind mph 0 0 -1. 00 3200 0 + 1.00 100 L . 10 -. 99 3300 R . 10 + . 99 200 L . 20 -. 98 3400 R . 20 + . 98 300 L . 29 -. 96 3500 R . 29 +. 96 400 L . 38 -. 92 3600 R . 38 + . 92 500 L .47 -. 88 3700 R . 47 + . 88 600 L . 56 -. 83 3800 R . 56 +. 83 700 L . 63 -. 77 3900 R . 63 +. 77 800 L .71 -. 71 4000 R . 71 +• 71 900 L .77 -. 63 4100 R . 77 +. 63 1000 L . 83 -. 56 4200 R . 83 +. 56 1100 L . 88 -. 47 4300 R . 88 +. 47 1200 L . 92 -. 38 4400 R . 92 + . 38 1300 L . 96 -. 29 4500 R . 96 + . 29 1400 L . 98 -. 20 4600 R . 98 +. 20 1500 L . 99 -. 10 4700 R . 99 +. 10 1600 L 1.00 .00 4800 R 1.00 . 00 1700 L . 99 +. 10 4900 R . 99 -. 10 1800 L . 98 +. 20 5000 R . 98 -. 20 1900 L . 96 + . 29 5100 R . 96 -. 29 2000 L . 92 + . 38 5200 R . 92 -. 38 2100 L . 88 + . 47 5300 R . 88 -. 47 2200 L . 83 + . 56 5400 R . 83 -. 56 2300 L . 77 + . 63 5500 R .77 -. 63 2400 L .71 +• 71 5600 R . 71 -. 71 2500 L . 63 + . 77 5700 R . 63 -. 77 2600 L . 56 +. 83 5800 R . 56 -. 83 2700 L .47 + . 88 5900 R . 47 -. 88 2800 L .38 + . 92 6000 R . 38 -. 92 2900 L . 29 + . 96 6100 R . 29 -. 96 3000 L . 20 + . 98 6200 R . 20 -. 98 3100 L . 10 + . 99 6300 R . 10 -. 99 3200 0 + 1.00 6400 0 -1.00 This table divides a wind of 1 mile per hour, blowing from the chart direction, into two components: the cross wind, perpendicular to the plane of fire; and the range wind, parallel to the plane of fire. The chart direction is the Y-azimuth of the wind direction as given in the metro message (increased by 6400 when necessary) minus the Y-azimuth of the direction of fire. 16 TM 6-315 ABBREVIATED FIRING TABLES CORRECTED DENSITY AND TEMPERATURE Height of battery with reference to the MDP (feet) Change in— Density (percent) Temperature (°F.) + 600 -1. 8 -1. 2 + 500 -1. 5 -1. 0 + 400 -1. 2 -0. 8 + 300 -0. 9 -0. 6 + 200 -0. 6 -0. 4 + 100 -0. 3 -0. 2 Same 0 0 -100 + 0. 3 + 0. 2 -200 + 0. 6 +0. 4 -300 + 0. 9 + 0. 6 -400 + 1. 2 +0. 8 -500 + 1. 5 + 1. 0 -600 + 1. 8 + 1. 2 Density decreases 0.3 percent for each 100 feet battery is above the MDP. Temperature decreases 0.2° F. for each 100 feet battery is above the MDP. CONVERSION TABLE Degrees and minutes to mils Degrees by 10’s Mils Degrees Mils Minutes by 10’s Mils Minutes Mils Minutes in tenths Mils 10° 177. 78 1° 17. 78 10' 2. 96 1' . 30 . 1' . 03 20° 355. 56 2° 35. 56 20' 5. 93 2' . 59 . 2' . 06 30° 533. 33 3° 53. 33 30' 8. 89 3' . 89 . 3' . 09 40° 711. 11 4° 71. 11 40' 11. 85 4' 1. 19 . 4' . 12 50° 888. 89 5° 88. 89 50' 14. 82 5' 1. 48 . 5' . 15 60° 1066. 67 6° 106. 67 6' 1. 78 . 6' . 18 70° 1244. 44 7° 124. 44 7' 2. 07 . 7' . 21 80° 1422. 22 8° 142. 22 8' 2. 37 . 8' . 24 90° 100° 1600. 00 1777. 78 9° 160. 00 9' 2. 67 . 9' . 27 110° 1955. 56 For example, to convert 78°43.6' to mils: 120° 2133. 33 70° = 1244. 44 mils 130° 2311. 11 8° = 142. 22 “ 140° 2488. 89 40' = 11 85 “ 150° 2666. 67 3' = 89 “ 160° 2844. 44 . 6' — 18 “ . A 5 ’ 170° 3022. 22 78°43. 6' = 1399. 58 mils I 424342°—41---3 17 TM 6-215 FIELD ARTILLERY Section III FIRING TABLES, 75-MM GUN Characteristics of 75-mm gun M1897, M1897A1, M1897A2, M1897- A3, and M1897A4, firing HE shell Mk. I and shrapnel Mk. I: 75-MM GUN Diameter of the bore between lands______:_________inches. _ 2. 953 Diameter of the bore between grooves________________do____ 2. 992 Total length___:---------4__________________________do____107.126 Length of rifled portion. .1________________________do____ 87. 772 Travel of projectile-____,__________________________ do___ 89. 9 Capacity of powder chamber. ____________r__cubic inches. _ 83 Number ofigrooves.,______4____.___________________________ 24 ™ , -a- (uniform twist Character of rifling______________________________< „ . ~ & , [Im 25.6 calibers Maximum pressure for which gun is designed pounds/square inch.. 36,000 Weight of gun and breech mechanism________________pounds. _ 1, 035 75-MM GUN CARRIAGE M2 On On wheels firing jack Maximum traverse, right_________________mils.. 800 800 Maximum traverse, left_____________________do 711 711 Least possible elevation___________________do__ —178 —178 Greatest possible elevation________________do__ 818 821 Traverse for one turn of traversing hand- wheel________1___________________________do__ 19.0 19.0 Change in elevation for one turn of elevating handwheel__________________________________do__ 10 10 Maximum range scale setting_____________yards. _ 9, 760 9, 760 75-MM GUN CARRIAGE M1897 (AND MODIFICATIONS) Total traverse (one-half on each side)_____________mils.. 106 Least possible elevation_____________________________do__ —178 Greatest possible elevation__________________________do__ 338 Traverse for one turn of traversing hand wheel______do__ 1.8 Change in elevation for one turn of elevating hand wheel__________________________________________do _ _ 8 Maximum range scale setting_______________________meters..5, 500 18 TM 6-215 ABBREVIATED FIRING TABLES PROJECTILE----MEAN WEIGHT OF FUZED PROJECTILE IN POUNDS Shrapnel.—Standardized at 15.96 pounds. HE shell Mk. I.—P. D. fuzes M46 and M47. Variations in weight are indicated by markings stenciled on the projectile as follows: Marking Weight L 11.58 + 11.91 + -p (standard)__________________________________________ 12.24 + + + 12.57 4- -j- + + .________________________________________ 12. 90 FUZES 21-second combination time and percussion. Point detonating fuzes: M46 (nose painted white)______superquick. M47 (nose painted black)______delay. 19 TM 6-215 FIELD ARTILLERY Characteristics of combinations of projectile, charge, and fuze for which tables are not included herein: HE shell Mk. I, fuzes (short) Mk. IV and Mk. V, reduced charge: Muzzle velocity, 1,130 f/s; maximum range, 6,965 yards. HE shell Mk. I, fuzes (short) Mk. IV and Mk. V, normal charge: Muzzle velocity, 1,805 f/s; maximum range, 8,915 yards. HE shell Mk. I, fuze, (long) Mk. Ill, normal charge: Muzzle velocity, 1,778 f/s; maximum range, 8,175 yards. Chemical shell Mk. II, fuzes M^.6 and M47, reduced charge: Muzzle velocity, 1,115 f/s; maximum range, 6,425 yards. Chemical shell Mk. II, fuzes MJfi and M^I, normal charge: Muzzle velocity, 1,758 f/s; maximum range, 8,810 yards. Chemical shell Mk. II, fuzes (short) Mk. IV and Mk. V, reduced charge: Muzzle velocity, 1,130 f/s; maximum range, 6,400 yards. Chemical shell Mk. II, fuzes (short) Mk. IV and Mk. V, normal charge: Muzzle velocity, 1,805 f/s; maximum range, 8,400 yards. Chemical shell Mk. II, fuze (long) Mk. Ill, normal charge: Muzzle velocity, 1,778 f/s; maximum range, 7,925 yards. 20 ABBREVIATED FIRING TABLES TM 6-215 SHRAPNEL MK. I Fuze 21-second combination Note.—Elevations given in this table are for carriage M2. Add 0.8 mil to these elevations when firing from carriage M1897 (and modification's). Muzzle velocity: 1,755 f/s. Maximum range: 9,760 yards. (Data for ranges 0-8000 included herein.) 21 \FLASFfLESSy /s' .sja 75G FLASHLESS 75 G MI897 latte! MI9lf> IWWI MW IMVI&9)! TM 6-215 FIELD ARTILLERY Table A 1 2 3 4 5 6 7 8 9 10 11 12 13 ' I...: □. for range 1-mil on Probable error Line number of metro message Deflection effect Range Elevation Fork Change in elevatio: 100-yard change in: Change in range for change in elevati Time of flight Range Deflection Height of burst Slope of fall Drift * Lateral wind of 1 mile per hour (+) R El F c 1 mil Time ^pr ^pd Slope Line Dft. VV-D yd. pi pi pi • yd. sec. yd. yd. pl 1/- No. Pi Pi 0 0. 2 1 1. 6 67 0. 0 n 0 1 1 L 1 0. 0 100 1. 8 1 1. 6 64 0. 1 u 0 1 1018 1 L 1 . 0 200 3. 4 1 1. 6 61 0. 3 n 0 1 407 1 L 1 . 0 300 5. 0 1 1. 8 58 0. 5 n 0 1 255 1 0 . 1 400 6. 8 1 1. 8 56 0. 7 n 0 1 173 1 0 . 1 500 8. 6 1 1. 8 54 0. 9 u 0 1 124 1 0 . 1 600 10. 6 1 2. 0 52 1. 1 ii 0 1 95 1 0 . 1 700 12. 6 1 2. 0 50 1. 3 n 0 1 77 1 0 . 1 800 14. 6 1 2. 0 48 1. 5 n 0 1 64 1 0 . 1 900 16. 8 1 2. 2 47 1. 7 n 0 1 54 1 0 . 1 1000 19. 0 1 2. 2 45 1. 9 n 1 1 46 1 0 . 1 1100 21. 2 1 2. 2 44 2. 1 n 1 1 40 1 0 . 1 1200 23. 6 1 2. 4 42 2. 3 n 1 1 35 1 0 . 1 1300 26. 2 1 2. 4 41 2. 6 n 1 1 31 1 0 o 1400 28. 8 1 2. 4 40 2. 8 n 1 1 28 1 R 1 . 2 1500 31. 4 1 2. 6 38 3. 0 n 1 1 25 1 R 1 . 2 1600 34. 0 1 2. 6 37 3. 2 n 1 1 23 1 R 1 . 2 1700 36. 8 1 2. 6 36 3. 4 n 1 1 21 1 R 1 . 2 1800 39. 6 1 2. 8 35 3. 7 n 1 1 19. 7 1 R 1 . 2 1900 42. 6 1 2. 8 34 4. 0 11 1 1 18. 2 1 R 1 . 2 2000 45. 6 1 3. 0 33 4. 3 u 1 1 16. 8 1 R 1 . 2 2100 48. 6 1 3. 0 32 4. 6 n 1 1 15. 6 1 R 1 . 2 2200 51. 6 1 3. 2 32 4. 9 n 1 1 14. 5 1 R 1 . 2 2300 54. 8 1 3. 2 31 5. 1 11 1 1 13. 5 1 R 1 . 3 2400 58. 2 1 3. 4 30 5. 4 ii 1 1 12. 6 1 R 1 . 3 2500 61. 8 1 3. 4 29 5. 7 n 1 1 11. 8 1 R 1 . 3 2600 65. 4 2 3. 4 29 6. 0 n 1 1 11. 2 1 R 2 . 3 2700 69. 0 2 3. 6 28 6. 3 n 1 1 10. 6 1 R 2 . 3 2800 72. 6 2 3. 6 27 6. 5 ii 1 1 10. 0 1 R 2 3 2900 76. 2 2 3. 6 27 6. 8 n 1 1 9. 4 1 R 2 . 3 3000 80. 0 2 3. 8 26 7. 1 n 1 1 8. 9 1 R 2 . 3 3100 83. 8 2 3. 8 26 7. 4 n 1 1 8. 4 1 R 2 . 3 3200 87. 6 2 4. 0 25 7. 7 ii 1 1 8. 0 1 R 2 . 3 3300 91. 6 2 4. 0 25 8. 0 n 1 1 7. 6 1 R 3 . 4 3400 95. 8 2 4. 2 24 8. 3 u 1 1 7. 2 1 R 3 . 4 3500 100. 0 2 4. 2 24 8. 6 n 1 1 6. 9 1 R 3 . 4 3600 104. 2 2 4. 2 23 8. 9 n 1 1 6. 6 1 R 3 . 4 3700 108. 6 2 4. 4 23 9. 2 n 1 1 6. 3 1 R 3 . 4 3800 113. 0 2 4. 4 23 9. 5 n 1 1 6. 0 1 R 3 . 4 3900 117. 4 2 4. 4 22 9. 9 n 1 1 5. 8 1 R 3 . 4 4000 122. 0 2 4. 6 22 10. 2 n 1 1 5. 5 1 R 4 . 4 *Drift includes side jump. 22 TM 6-215 ABBREVIATED FIRING TABLES Table A—Continued 14 15 16 17 18 19 20 211 22 23 24 25 1 Complementary Range effect of increase of— 6 S 3 CD b.0 angle of eac site for g h fl f , § rO u Pl •ature 1° is 59° F. 8 CD s m 1 22 Q o fl ft • second V 1 mile ] LU’ 'o3 •S >> for gras it of t 5 point actor in- ng for ind moc bD O o i percent irojectile ght 15.9i foot pei M CD'tJ albf) bfl ge settin 8) fl ^□2 c3 NJ •2’S 1 fl 1 3 I + i 1 o ° * O o pR fl ■ w P5 Wt. VE Temp. W-R Den. F. S. Height Range Set. Set. R yd. yd. yd. yd. yd. sec. yd. m. yd. yd. 0. 00 0. 00 0 0. 0 0. 0 0. 0 0 0. 0 160 -50 0 . 00 . 00 —1 + 0. 1 0. 0 0. 0 0 0. 2 4. 1 230 250 + 50 100 . 00 . 00 -1 + 0. 2 0. 0 + 0. 1 0 0. 4 4. 1 226 340 150 200 . 00 . 00 — 2 + 0. 3 0. 0 + 0. 1 0 0. 6 4. 2 221 425 250 300 . 00 . 00 +2 + 0. 4 0. 0 + 0. 1 0 0. 8 4. 2 217 510 355 400 . 00 . 00 -3 + 0. 5 0. 0 + 0. 2 -1 1. 0 4. 3 213 595 455 500 . 00 . 00 -3 + 0. 6 0. 0 + 0. 2 -1 1. 2 4. 4 209 680 555 600 . 00 . 00 — 4 + 0. 7 0. 0 + 0. 2 -1 1. 4 4. 5 205 765 655 700 . 00 . 00 — 4 + 0. 8 0. 0 + 0. 3 -1 1. 6 4. 5 202 850 755 800 . 00 . 00 45 + 0. 9 0. 0 + 0. 3 -2 1. 9 4. 6 199 935 855 900 . 00 . 00 -5 + 1.0 0. 0 + 0. 4 -2 2. 1 4. 7 196 1020 955 1000 . 00 . 00 -5 + 1. 1 0. 0 + 0. 4 -2 2. 3 4. 7 193 1110 1060 1100 . 00 . 00 -5 + 1. 1 0. 0 + 0. 5 — 2 2. 6 4. 8 190 1200 1165 1200 . 00 . 00 -5 + 1. 2 0. 0 + 0. 5 -3 2. 8 4. 9 188 1290 1270 1300 . 00 . 00 -5 + 1. 2 0. 0 + 0. 6 -3 3. 1 4. 9 185 1380 1375 1400 . 00 . 00 -5 + 1. 3 0. 0 + 0. 7 -3 3. 3 5. 0 183 1470 1480 1500 . 00 . 00 -5 + 1. 3 0. 0 + 0. 7 -4 3. 6 5. 1 180 1560 1580 1600 . 00 . 00 -5 + 1. 4 0. 0 + 0. 8 — 4 3. 8 5. 1 178 1650 1680 1700 . 00 . 00 -5 + 1. 5 0. 0 + 0. 9 -5 4. 1 5. 2 176 1745 1780 1800 . 00 . 00 -5 + 1. 5 + 0. 1 + 1. 0 -5 4. 3 5. 3 174 1840 1880 1900 +.01 -. 01 -5 + 1. 6 + 0. 1 + 1. 1 -5 4. 6 5. 3 172 1935 1980 2000 +. 01 -. 01 -5 + 1. 6 + 0. 1 + 1. 2 -6 4. 9 5. 4 170 2030 2080 2100 +. 01 -. 01 -5 + 1. 7 + 0. 1 + 1. 3 -6 5. 2 5. 5 168 2125 2180 2200 +. 01 -. 01 — 4 + 1. 7 + 0. 2 + 1. 4 -6 5. 5 5. 5 166 2220 2280 2300 +. 01 -. 01 -4 + 1. 8 + 0. 2 + 1. 5 -7 5. 8 5. 6 165 2315 2380 2400 +. 01 -. 01 — 4 + 1. 8 + 0. 3 + 1. 6 -7 6. 0 5. 7 163 2415 2480 2500 +. 01 -. 01 — 4 + 1. 9 + 0. 3 + 1. 7 -8 6. 3 5. 8 162 2515 2580 2600 +. 01 -. 01 — 4 + 1. 9 + 0. 3 + 1. 8 -8 6. 6 5. 9 160 2615 2685 2760 +. 01 -. 01 -3 + 2. 0 + 0. 4 + 1. 9 -9 6. 9 5. 9 159 2715 2785 2800 +.01 -. 01 -3 + 2. 0 + 0. 4 + 2. 0 -9 7. 2 6. 0 157 2810 2885 2900 +. 01 -. 01 -3 + 2. 0 + 0. 5 + 2. 2 -9 7. 5 6. 0 156 2905 2985 3000 + . 01 -. 01 -3 + 2. 1 + 0. 5 + 2. 3 -10 7. 9 6. 1 155 3000 3085 3100 +. 01 -. 01 -3 + 2. 1 + 0. 6 + 2. 4 -10 8. 2 6. 1 153 3095 3180 3200 + . 01 01 — 2 + 2. 1 + 0. 6 + 2. 6 -11 8. 5 6. 2 152 3195 3280 3300 +. 01 -. 01 — 2 + 2. 2 + 0. 7 + 2. 7 -11 8. 8 6. 3 150 3290 3380 3400 +.01 -. 01 -2 + 2. 2 + 0. 8 + 2. 9 -11 9. 1 6. 3 149 3385 3480 3500 +. 01 -. 01 -2 + 2. 2 + 0. 9 + 3. 0 -12 9. 4 6. 4 148 3480 3580 3600 +. 01 -. 01 — 2 + 2. 3 + 0. 9 + 3. 2 -12 9. 7 6. 4 147 3580 3680 3700 +. 01 -. 01 -1 + 2. 3 + 1.0 + 3. 3 -13 10. 0 6. 5 146 3675 3780 3800 +. 01 -. 01 -1 + 2. 3 + 1.0 + 3. 5 -13 10. 4 6. 6 144 3770 3880 3900 + . 01 01 -1 + 2. 3 + 1. 1 + 3. 7 -14 10. 7 6. 6 143 3865 3980 4000 23 TM 6-215 FIELD ARTILLERY Table A—Continued 1 2 3 4 5 6 7 8 9 10 11 12 13 Probable Deflection a o o fe.S error effect bo a aS levation o hange in elevati for 100-yard char in range hange in range l-mil change elevation ime of flight setting for 7890 7900 + . 22 -. 19 + 13 + 3. 1 + 4. 2 + 12. 5 -33 graze burst seconds. IS 21- 7990 8000 424342°—41---4 25 TM 6-215 FIELD ARTILLERY Table B.—Change in velocity due to change in temperature of powder— Temperature of powder, F 0 10 20 30 40 50 60 70 80 90 100 Change in velocity, feet per second -51 -44 -37 -29 -22 -15 -8 0 + 8 + 16 + 25 Table C.—Cant of carriage axle, deflection effect in mils due to— Range, yards 1000 2000 3000 4000 5000 6000 7000 Cant of 10 mils, effect 0. 2 0. 4 0. 8 1. 2 1. 7 2. 3 3. 0 Range, yards 7000 8000 9000 9500 9600 9700 9760 Cant of 10 mils, effect 3. 0 4. 0 5. 4 6. 8 7. 3 8. 0 9. 5 Note.—Right wheel above left causes left deflection effect. The deflection due to cant is automatically compensated for by cross-leveling the sight, and this table is to be used only in the event the sight cannot be so cross-leveled. 26 TM 6—215 ABBREVIATED FIRING TABLES HE SHELL MK. I Fuzes M46 and M47 (reduced charge} Note.—Elevations given in this table are for carriage M2. Add 1.0 mils to these elevations when firing from carriage M1897 (and modifications). Muzzle velocity: 1115f/s. Maximum range: 6,700 yards. (Data for ranges 0-6700 included herein.) 27 TM 6-215 FIELD ARTILLERY Table A 1 2 3 4 5 6 7 8 9 10 11 12 .o.S Probable error 2 Deflection effect Range Elevation Fork Change in elevation 100-yard change range Change in range for 1 change in elevatio Time of flight Range Deflection Slope of fall Line number of message Drift* Lateral wind of 1 mile per hour (+) R El F C 1 mil Time ^pr ®pd Slope L Dft. W-D yd. hi hi hi yd. sec. yd. yd. V- No. hi Pi 0 -1. 2 1 4. 0 25 0. 0 8 0 1 L 1 0. 0 100 + 2. 8 1 4. 0 25 0. 3 8 0 239 1 L 1 0. 0 200 6. 8 1 4. 2 24 0. 6 8 0 119 1 L 1 0. 0 300 11. 0 1 4. 2 24 0. 8 9 0 78 1 L 1 0. 0 400 15. 2 1 4. 2 24 1. 1 9 0 58 1 L 1 0. 0 500 19. 6 2 4. 4 23 1. 4 9 0 45 1 L 1 0. 0 600 24. 0 2 4. 4 23 1. 7 9 0 37 1 0 0. 0 700 28. 4 2 4. 6 22 2. 0 9 0 31 1 0 0. 0 800 33. 0 2 4. 6 22 2. 3 10 0 27 1 0 0. 0 900 37. 8 2 4. 8 21 2. 6 10 0 24 1 0 0. 0 1000 42. 6 2 4. 8 21 2. 9 10 0 21 1 0 0. 1 1100 47. 4 2 4. 8 21 3. 2 10 0 18. 8 1 0 0. 1 1200 52. 4 2 5. 0 20 3. 5 10 0 16. 9 1 0 0. 1 1300 57. 4 2 5. 0 20 3. 9 11 0 15. 3 1 0 0. 1 1400 62. 6 2 5. 2 20 4. 2 11 0 14. 0 1 R 1 0. 1 1500 67. 8 2 5. 2 19 4. 5 11 0 12. 9 1 R 1 0. 1 1600 73. 2 2 5. 4 19 4. 8 11 0 11. 9 1 R 1 0. 1 1700 78. 6 2 5. 4 19 5. 2 11 0 11. 0 1 R 1 0. 1 1800 84. 2 3 5. 6 18 5. 5 12 0 10. 3 1 R 1 0. 1 1900 89. 8 3 5. 6 18 5. 9 12 0 9. 6 1 R 1 0. 1 2000 95. 4 3 5. 8 18 6. 2 12 0 9. 0 1 R 1 0. 1 2100 101. 2 3 5. 8 17 6. 6 12 0 8. 4 1 R 1 0. 1 2200 107. 2 3 6. 0 17 6. 9 13 0 7. 9 1 R 1 0. 2 2300 113. 2 3 6. 0 17 7. 3 13 0 7. 4 1 R 1 0. 2 2400 119. 4 3 6. 2 16 7. 6 13 0 7. 0 1 R 1 0. 2 2500 125. 6 3 6. 2 16 8. 0 13 0 6. 6 1 R 1 0. 2 2600 132. 0 3 6. 4 16 8. 4 14 0 6. 3 1 R 1 0. 2 2700 138. 4 3 6. 6 15 8. 8 14 0 6. 0 1 R 1 0. 2 2800 145. 0 4 6. 6 15 9. 1 14 0 5. 7 1 R 2 0. 2 2900 151. 8 4 6. 8 15 9. 5 14 0 5. 4 1 R 2 0. 2 3000 158. 6 4 6. 8 15 9. 9 15 0 5. 1 1 R 2 0. 2 3100 165. 6 4 7. 0 14 10. 3 15 0 4. 9 1 R 2 0. 2 3200 172. 6 4 7. 2 14 10. 7 15 0 4. 7 1 R 3 0. 2 3300 179. 8 5 7. 4 14 11. 1 15 0 4. 4 1 R 3 0. 3 3400 187. 2 5 7. 4 14 11. 5 16 0 4. 2 1 R 3 0. 3 3500 194. 8 5 7. 6 13 11. 9 16 0 4. 1 1 R 4 0. 3 3600 202. 4 5 7. 8 13 12. 3 16 0 3. 9 2 R 4 0. 3 3700 210. 2 5 8. 0 13 12. 8 17 0 3. 7 2 R 4 0. 3 3800 218. 2 6 8. 2 12 13. 2 17 0 3. 6 2 R 5 0. 3 3900 226. 4 6 8. 2 12 13. 7 17 0 3. 4 2 R 5 0. 3 4000 234. 6 6 8. 4 12 14. 1 18 0 3. 3 2 R 5 0. 3 ‘Drift includes side jump. 28 TM 6-215 ABBREVIATED FIRING TABLES Table A—Continued 13 14 15 16 17 18 19 20 21 1 Complementary angle of site for each Range effect of increase of— qq Range setting for ® 1897 carriage J* (and models) ® Range setting for S- M2 carriage PS Range 4- 1 mil of site —1 mil of site One + in weight of projectile. «* Two ++ is standard One foot per M second in MV ft Air temperature B 1°. Standard is -p 59° F. Rear wind 1 mile ►g per hour One percent in air 3 density lA iA yd. yd. yd. yd. yd. m. yd. yd. . 00 . 00 0 0. 0 0. 0 0. 0 0 85 -145 0 . 00 . 00 -2 + 0. 2 0. 0 0. 0 0 340 + 130 100 . 00 . 00 -3 + 0. 3 + 0. 1 0. 0 0 535 380 200 . 00 . 00 -5 + 0. 5 + 0. 1 + 0. 1 0 715 605 300 . 00 . 00 -6 + 0. 6 + 0. 2 + 0. 1 0 890 815 400 . 00 . 00 -8 + 0. 8 + 0. 2 + 0. 1 -i 1065 1010 500 . 00 . 00 -9 + 0. 9 + 0. 3 + 0. 2 -i 1230 1195 600 . 00 . 00 -10 + 1.0 + 0. 3 + 0. 2 -^•1 1390 1375 700 . 00 . 00 -11 + 1. 1 + 0. 4 + 0. 3 -1 1550 1550 800 . 00 . 00 -12 + 1. 2 + 0. 4 + 0. 3 -»1 1605 1720 900 . 00 . 00 -13 + 1.3 + 0. 5 + 0. 4 -i 1860 1890 1000 . 00 . 00 -14 + 1.4 + 0. 6 + 0. 5 -1 2010 2050 1100 +. 01 . 00 -14 + 1.5 + 0. 6 + 0. 6 -2 2160 2205 1200 + . 01 . 00 -15 + 1.6 + 0. 7 + 0. 8 -2 2310 2360 1300 +.01 . 00 -15 + 1. 7 + 0. 7 + 0. 9 -2 2455 2515 1400 +. 01 . 00 -16 + 1. 8 + 0. 8 + 1. 0 -2 2600 2665 1500 +. 01 -. 01 -16 + 1. 8 + 0. 9 + 1.2 -2 2740 2810 1600 + ■ 01 01 -16 + 1. 9 + 0. 9 + 1.3 — 2 2880 2955 1700 +. 02 -. 01 -17 + 2. 0 + 1. 0 + 1.5 -3 3020 3100 1800 +. 02 -. 01 -17 + 2. 0 + 1. 0 + 1. 6 -3 3155 3240 1900 + . 02 -. 02 -17 + 2. 1 + 1. 1 + 1. 8 -3 3290 3380 2000 +. 02 -. 02 -17 + 2. 2 + 1. 2 + 2. 0 -3 3425 3520 2100 +. 02 -. 02 -17 + 2. 2 + 1. 2 + 2. 2 — 4 3560 3660 2200 +. 03 -. 02 -16 + 2. 3 + 1.3 + 2. 3 -4 3690 3800 2300 +. 03 -. 03 -16 + 2. 3 + 1. 3 + 2. 5 -4 3820 3935 2400 +. 03 -. 03 -16 + 2. 4 + 1. 4 + 2. 7 — 4 3950 4070 2500 +. 03 -. 03 -16 + 2. 4 + 1. 5 + 2. 9 -5 4080 4205 2600 + . 04 -. 03 -15 + 2. 5 + 1.5 + 3. 1 -5 4210 4340 2700 +. 04 -. 04 -15 + 2. 5 + 1. 6 + 3. 3 -5 4335 4470 2800 + . 04 -. 04 -14 + 2. 5 + 1. 6 + 3. 5 -6 4460 4605 2900 + . 04 -. 04 -14 + 2. 6 + 1. 7 + 3. 7 -6 4585 4735 3000 +. 05 -. 05 -13 + 2. 6 + 1. 8 + 3. 9 — 6 4710 4870 3100 +. 05 -. 05 -13 + 2. 7 + 1. 9 + 4. 1 -7 4835 5000 3200 +. 05 -. 05 -12 + 2. 7 + 1. 9 + 4. 4 -7 4955 5135 3300 + . 06 06 -12 + 2. 7 + 2. 0 + 4. 6 -7 5075 5265 3400 + . 06 -. 06 -12 + 2. 8 + 2. 1 + 4. 8 -8 5195 5395 3500 + . 06 -. 06 -11 + 2. 8 + 2. 2 + 5. 0 -8 5320 5530 3600 + . 07 07 -11 + 2. 8 + 2. 2 + 5. 3 -8 5440 5660 3700 +. 07 07 -10 + 2. 9 + 2. 3 + 5. 5 -9 5560 5790 3800 + . 08 -. 08 -10 + 2. 9 + 2. 3 + 5. 8 -9 5920 3900 + . 08 08 -10 + 3. 0 + 2. 4 + 6. 0 -9 6050 4000 29 TM 6—215 FIELD ARTILLERY Table A—Continued 1 2 3 4 5 6 7 8 9 10 11 12 S-S fl Probable error o Deflection effect a „ r—4 O Line number of me message Range Elevation Fork Change in elevatio 100-yard change range Change in range for change in elevati Time of flight Range Deflection Slope of fall Drift* Lateral wind of 1 mile per hour (+) R El F C Time Ppr Slope L Dft. W-D yd. yd. sec. yd. yd. V- No. pi 4000 234. 6 6 8. 4 12 14. 1 18 0 3. 3 2 R 5 0. 3 4100 243. 0 6 8. 6 12 14. 6 18 0 3. 1 2 R 6 0. 3 4200 251. 8 7 8. 8 11 15. 1 19 0 3. 0 2 R 6 0. 3 4300 260. 8 7 9. 0 11 15. 5 19 0 2. 9 2 R 6 0. 4 4400 269. 8 7 9. 2 11 16. 0 20 0 2. 8 2 R 7 0. 4 4500 279. 2 8 9. 4 11 16. 5 20 0 2. 7 2 R 7 0. 4 4600 288. 8 8 9. 6 10 17. 0 21 0 2. 6 2 R 7 0. 4 4700 298. 8 8 10. 0 10 17. 5 21 0 2. 5 2 R 8 0. 4 4800 309. 0 9 10. 4 10 18. 1 22 0 2. 4 2 R 8 0. 4 4900 319. 4 9 10. 6 9 18. 6 22 0 2. 3 2 R 9 0. 4 5000 330. 2 10 11. 0 9 19. 1 23 0 2. 2 2 R 9 0. 4 5100 341. 4 10 11. 2 9 19. 7 24 0 2. 1 3 R10 0. 5 5200 352. 8 11 11. 6 9 20. 3 24 0 2. 0 3 R10 0. 5 5300 364. 8 12 12. 0 8 20. 8 25 0 1. 93 3 R 11 0. 5 5400 377. 2 13 12. 6 8 21. 4 25 0 1. 85 3 R 11 0. 5 5500 390. 0 14 13. 2 8 22. 0 26 0 1. 78 3 R 12 0. 5 5600 403. 4 15 13. 8 7 22. 6 26 0 1. 70 3 R 13 0. 5 5700 417. 6 16 14. 4 7 23. 3 27 0 1. 63 3 R 14 0. 5 5800 432. 4 17 15. 2 7 24. 0 27 0 1. 56 3 R 15 0. 6 5900 448. 0 18 16. 0 6 24. 8 28 0 1. 49 3 R 16 0. 6 6000 464. 6 20 17. 2 6 25. 6 29 1 1. 42 3 R 17 0. 6 6100 482. 4 22 18. 6 5 26. 4 30 1 1. 35 3 R 18 0. 6 6200 501. 8 25 20. 2 5 27. 3 31 1 1. 28 4 R19 0. 6 6300 523. 0 28 22. 0 5 28. 2 32 1 1. 22 4 R20 0. 7 6400 546. 2 32 24. 4 4 29. 2 33 1 1. 15 4 R22 0. 7 6500 572. 0 38 28. 2 4 30. 3 34 1 1. 08 4 R24 0. 7 6600 603. 2 52 36. 4 3 31. 6 36 1 1. 00 5 R26 0. 8 6700 647. 2 33. 4 39 1 0. 91 5 R31 0. 9 6775 730. 8 36. 7 45 1 0. 76 5 R40 1. 0 6700 817. 4 39. 8 52 1 0. 63 5 R50 1. 0 *Drift includes side jump. 30 TM 6-215 ABBREVIATED FIRING TABLES Table A—Continued 13 14 15 16 17 18 19 20 21 1 Complementary angle of site for each Range effect of increase of— Range setting for 1897 carriage (and models) Range setting for M2 carriage W Range + 1 mil of site —1 mil of site One+in weight of projectile. Tw’o++is standard One foot per M second in MV Air temperature S 1°. Standard is hg 59° F. Rear wind 1 mile g-j per hour ® One percent in air B density yd. yd. yd. yd. yd. m. yd. yd. +. 08 -. 08 -10 + 3. 0 + 2. 4 + 6. 0 -9 6050 4000 +. 09 -. 09 -9 + 3. 0 + 2. o + 6. 2 -10 6180 4100 +. 09 09 -9 + 3. 0 + 2. 5 + 6. 5 -10 6310 4200 +. 10 10 -8 + 3. 0 + 2. 6 + 6. 7 -11 6440 4300 +. 11 11 -8 + 3. 1 + 2. 6 + 7. 0 -11 6570 4400 +• 12 12 -7 + 3. 1 + 2. 7 + 7. 2 -11 6700 4500 +• 13 13 -6 + 3. 1 + 2. 8 + 7. 4 -12 6830 4600 +. 14 14 -5 + 3. 2 + 2. 8 + 7. 7 -12 6960 4700 +. 15 15 -4 + 3. 2 + 2. 9 + 7. 9 -13 7090 4800 +. 16 16 -3 + 3. 2 + 2. 9 + 8. 2 -13 7220 4900 +. 18 17 -2 + 3. 3 + 3. 0 + 8. 4 - 14 7355 5000 +. 19 18 -1 + 3. 3 + 3. 1 + 8. 6 -14 7485 5100 +.21 19 0 + 3. 3 + 3. 1 + 8. 9 -15 7620 5200 +. 23 21 + 2 + 3. 4 + 3. 2 + 9. 1 -16 7750 5300 +. 25 23 + 3 + 3. 4 + 3. 2 + 9. 4 -16 7885 5400 +. 27 25 + 4 + 3. 4 + 3. 3 + 9. 6 -17 8020 5500 +. 30 -. 27 + 5 + 3. 4 + 3. 4 + 9. 8 -17 bD 8155 5600 +. 33 30 + 7 + 3. 5 + 3. 4 + 10. 1 -18 t aimii 8285 5700 +. 37 33 + 8 + 3. 5 + 3. 5 + 10. 3 -19 8420 5800 + .41 37 + 10 + 3. 5 + 3. 5 + 10. 6 -19 8550 5900 +. 46 41 + 11 + 3. 6 + 3. 6 + 10. 8 -20 a 8685 6000 +. 53 47 + 12 + 3. 6 + 3. 6 + 11. 1 -21 + 8815 6100 +. 63 54 + 13 + 3. 7 + 3. 7 + 11. 3 -21 a3 8950 6200 +. 76 63 + 14 + 3. 7 + 3. 7 + 11. 6 -22 O’ 9085 6300 +. 93 74 + 16 + 3. 7 + 3. 7 + 11. 8 -23 9220 6400 + 1. 16 88 + 18 + 3. 8 + 3. 8 + 12. 1 -24 9355 6500 + 2. 04 -1. 07 + 20 + 3. 8 + 3. 8 + 12. 4 -25 9485 6600 -1. 68 + 23 + 3. 9 + 3. 8 + 12. 7 -26 9610 6700 -3. 80 + 26 + 4. 0 + 3. 8 + 13. 1 -27 9730 6775 + 27 + 4. 0 + 3. 7 + 13. 4 -28 9850 6700 31 TM 6-215 FIELD ARTILLERY Table B.—Change in velocity due to change in temperature of powder— Temperature of Powder, F 0 10 20 30 40 50 60 70 80 90 100 Change in velocity, feet per second -23 -20 -17 -14 -11 -7 — 4 0 + 3 +7 + 11 Table C.—Cant of carriage axle, deflection effect in mils due to— Range, yards Cant of 10 mils, effect 1000 0. 4 2000 0. 9 3000 1. 6 4000 2. 4 5000 3. 4 5500 4. 0 6000 4. 9 Range, yards Cant of 10 mils, effect 6000 4.9 6500 6. 3 6600 6. 7 6700 7. 4 6775 8. 7 6700 10. 4 Note.—Right wheel above left causes left deflection effect. The deflection due to cant is automatically compensated for by cross-leveling the sight, and this table is to be used only in the event the sight cannot be so cross-leveled. 32 ABBREVIATED FIRING TABLES TM 6-215 HE SHELL, MK. I Fuzes and M47 fnormal charge ) Note.—Elevations given in this table are for carriage M2. Add 0.8 mil to these elevations when firing from carriage M1897 (and modifications). Muzzle velocity: 1,784 f/s. Maximum range: 9,000 yards. (Data for ranges 0-8000 included herein.) 33 I SWELL MKIA \ flashless y loi'HAWI Llbiw 9i6i w I ■I'i'.lAW 16? IW C*'1-UA •»tj zzzzzzj SS3TH5VW + 4 KW TI3HS INA 9GL TM 6-215 FIELD ARTILLERY Table A 1 2 3 4 5 6 7 8 9 10 11 12 ,o .S r 1-mil ion Probable error 2 s Deflection effect Range Elevation Fork Change in elevatic 100-yard change range Change in range fo change in elevat Time of flight Range Deflection Slope of fall Line number of message Drift* Lateral wind of 1 mile per hour (+) R El F C 1 mil Time £pr ®pd Slope Line Dft. W-D yd- r/i yd. sec. yd. yd. 1/- No. & & 0 -1. 0 1 1. 4 71 0. 0 10 0 1 L 1 . 0 100 + 0. 6 1 1. 4 68 0. 1 10 0 599 1 L 1 . 0 200 2. 2 1 1. 6 65 0. 3 10 0 291 1 L 1 . 0 300 3. 8 1 1. 6 62 0. 5 n 0 189 1 0 . 0 400 5. 6 1 1. 8 59 0. 7 li 0 140 1 0 . 0 500 7. 4 1 1. 8 56 0. 9 n 0 109 1 0 . 0 600 9. 2 1 2. 0 53 1. 1 n 0 88 1 0 . 0 700 11. 2 1 2. 0 50 1. 3 n 0 73 1 0 . 0 800 13. 2 1 2. 2 48 1. 5 n 0 62 1 0 . 0 900 15. 2 1 2. 2 46 1. 7 12 0 53 1 0 . 0 1000 17. 4 1 2. 2 44 1. 9 12 0 46 1 0 . 0 1100 19. 6 1 2. 4 42 2. 2 12 0 41 1 0 . 0 1200 22. 0 1 2. 4 41 2. 4 12 0 36 1 0 . 0 1300 24. 4 1 2. 6 39 2. 6 12 0 32 1 0 . 0 1400 27. 0 1 2. 6 38 2. 9 12 0 29 1 0 . 0 1500 29. 6 1 2. 8 37 3. 1 13 0 26 1 R 1 . 1 1600 32. 4 1 2. 8 36 3. 4 13 0 23 1 R 1 . 1 1700 35. 2 2 3. 0 34 3. 6 13 0 21 1 R 1 . 1 1800 38. 0 2 3. 0 33 3. 9 13 0 19. 2 1 R 1 . 1 1900 41. 0 2 3. 2 32 4. 2 14 0 17. 6 1 R 1 . 1 2000 44. 2 2 3. 2 31 4. 4 14 0 16. 2 1 R 1 . 1 2100 47. 4 2 3. 4 30 4. 7 14 0 14. 9 1 R 1 . 1 2200 50. 8 2 3. 4 29 5. 0 14 0 13. 8 1 R 1 . 1 2300 54. 2 2 3. 6 28 5. 3 15 0 12. 8 1 R 1 . 1 2400 57. 8 2 3. 6 27 5. 6 15 0 11. 9 1 R 2 . 1 2500 61. 4 2 3. 8 26 5. 9 15 0 11. 1 1 R 2 . 1 2600 65. 2 2 3. 8 26 6. 2 15 0 10. 4 1 R 2 . 1 2700 69. 0 3 4. 0 25 6. 5 16 0 9. 8 1 R 2 . 2 2800 73. 0 3 4. 0 25 6. 8 16 0 9. 2 1 R 2 . 2 2900 77. 0 3 4. 2 24 7. 1 16 0 8. 6 1 R 2 . 2 3000 81. 2 3 4. 2 24 7. 4 17 0 8. 1 1 R 2 . 2 3100 85. 4 3 4. 4 23 7. 7 17 0 7. 7 1 R 2 . 2 3200 89. 8 3 4. 4 23 8. 1 17 0 7. 3 1 R 3 . 2 3300 94. 4 3 4. 6 22 8. 4 18 0 6. 9 1 R 3 . 2 3400 99. 0 3 4. 6 22 8. 7 18 0 6. 6 1 R 3 . 2 3500 103. 6 3 4. 8 21 9. 1 18 0 6. 3 1 R 3 . 2 3600 108. 4 4 4. 8 21 9. 4 19 0 6. 0 1 R 3 . 2 3700 113. 4 4 5. 0 20 9. 8 19 0 5. 7 1 R 3 . 2 3800 118. 4 4 5. 0 20 10. 1 20 0 5. 4 1 R 3 . 3 3900 123. 4 4 5. 2 19 10. 5 20 0 5. 2 1 R 4 . 3 4000 128. 6 4 5. 2 19 10. 8 21 0 5. 0 1 R 4 . 3 *Drift includes side jump. 34 TH 6-215 ABBREVIATED FIRING TABLES Table A—Continued 13 14 15 16 17 18 19 20 21 1 Complementary angle of site for each Range effect of increase of— 03 Q s o 04 00 3 PS w Pm o PS Q co R El F c 1 mil Time ©pr epd Slope Line yd. yd. sec. yd. yd. V- No. 0 -5. 8 2 7. 0 14 0. 0 8 0 1 100 + 1. 2 2 7. 2 14 0. 4 8 0 140 1 200 8. 4 2 7. 2 14 0. 7 8 0 70 1 300 15. 6 2 7. 2 14 1. 1 8 0 46 1 400 23. 0 2 7. 2 14 1. 4 8 0 35 1 500 30. 2 2 7. 2 14 1. 8 8 0 28 1 600 37. 6 2 7. 4 14 2. 2 9 0 23 1 700 44. 8 2 7. 4 13 2. 6 9 0 19. 7 1 800 52. 2 3 7. 4 13 2. 9 9 0 17. 2 1 900 59. 8 3 7. 4 13 3. 3 9 0 15. 2 1 1000 67. 2 3 7. 4 13 3. 7 9 0 13. 6 1 1100 74. 8 3 7. 4 13 4. 1 10 0 12. 3 1 1200 82. 2 3 7. 6 13 4. 5 10 ■0 11. 2 1 1300 89. 8 3 7. 6 13 4. 8 10 0 10. 3 1 1400 97. 6 3 7. 6 13 5. 2 10 1 9. 5 1 1500 105. 4 3 7. 8 13 5. 6 10 1 8. 9 1 1600 113. 2 4 7. 8 13 6. 0 11 1 8. 3 1 1700 121. 0 4 7. 8 13 6. 4 11 1 7. 7 1 1800 128. 8 4 8. 0 12 6. 7 11 1 7. 2 1 1900 136. 8 4 8. 0 12 7. 1 12 1 6. 8 1 2000 145. 0 4 8. 2 12 7. 5 12 1 6. 4 1 2100 153. 0 5 8. 2 12 7. 9 12 1 6. 1 1 2200 161. 2 5 8. 4 12 8. 3 13 1 5. 8 1 2300 169. 6 5 8. 4 12 8. 7 13 1 5. 5 1 2400 178. 0 5 8. 6 12 9. 1 13 1 5. 2 1 2500 186. 6 5 8. 6 12 9. 5 14 1 5. 0 1 2600 195. 2 6 8. 8 11 9. 9 14 1 4. 7 1 2700 204. 0 6 8. 8 11 10. 3 15 1 4. 5 1 2800 212. 8 6 9. 0 11 10. 8 15 1 4. 3 1 2900 221. 8 6 9. 0 11 11. 2 16 1 4. 1 1 3000 230. 8 6 9. 2 11 11. 6 16 1 4. 0 1 3100 240. 0 7 9. 2 11 12. 1 17 1 3. 8 1 3200 249. 4 7 9. 4 10 12. 5 17 1 3. 7 2 3300 259. 0 7 9. 6 10 13. 0 17 1 3. 5 2 3400 268. 8 7 9. 8 10 13. 4 18 1 3. 4 2 3500 278. 6 7 10. 0 10 13. 9 18 1 3. 2 2 3600 288. 6 8 10. 2 10 14. 4 19 2 3. 1 2 3700 299. 0 8 10. 4 10 14. 9 19 2 2. 9 2 3800 309. 6 8 10. 6 9 15. 4 19 2 2. 8 2 3900 320. 4 9 10. 8 9 15. 9 20 2 2. 7 2 4000 331. 4 9 11. 2 1 9 16. 4 20 2 2. 6 1 2 42 TH 6-215 ABBREVIATED FIRING TABLES Table A—Continued 11 12 13 14 15 16 17 18 19 1 Deflection effect Complementary angle of site for each Range effect of increase of— terialwindof 1 mile per hour (+) ’w O a s 1 mil of site ie square in weight f projectile. Four quares is standard. e foot per second in MV • temperature 1°. Standard is 59° F. ar wind 1 mile per hour e percent in air density 1 bo 0 c3 + 1 now O p o ’<1 Ph p o 03 Ph Dft.* W-D wt. VE Temp. W-R Den. R pi pi pi pi yd. yd. yd. yd. yd. yd. L 4 0. 0 . 00 . 00 0 0. 0 0. 0 0. 0 0 0 L 4 0. 0 . 00 . 00 -1 + 0. 2 0. 0 0. 0 0 100 L 4 0. 0 . 00 . 00 — 2 + 0. 4 0. 0 0. 0 0 200 L 4 0. 0 . 00 . 00 -3 + 0. 7 0. 0 0. 0 0 300 L 4 0. 0 . 00 . 00 -4 + 0. 9 0. 0 0. 0 0 400 L 3 0. 0 . 00 . 00 -5 + 1. 1 0. 0 + 0. 1 0 500 L 3 0. 0 . 00 . 00 -6 + 1. 3 0. 0 + 0. 1 0 600 L 3 0. 0 . 00 . 00 — 7 + 1. 6 0. 0 + 0. 1 0 700 L 3 0. 0 . 00 . 00 -8 + 1. 8 0. 0 + 0. 1 0 800 L 3 0. 0 . 00 . 00 — 9 + 2. 1 0. 0 + 0. 2 0 900 L 2 0. 0 +. 01 -. 01 -10 + 2. 3 0. 0 + 0. 2 0 1000 L 2 0. 0 + . 01 -. 01 -11 + 2. 5 0. 0 + 0. 2 0 1100 L 2 0. 0 +. 01 -. 01 -12 + 2. 7 0. 0 + 0. 2 0 1200 L 2 0. 0 + . 02 -. 01 -12 + 3. 0 0. 0 + 0. 3 0 1300 L 2 0. 0 +. 02 -. 01 -13 + 3. 2 0. 0 + 0. 3 0 1400 L 1 0. 1 +. 02 -. 01 -14 + 3. 4 0. 0 + 0. 3 0 1500 L 1 0. 1 +. 02 -. 01 -15 + 3. 6 0. 0 + 0. 3 -1 1600 L 1 0. 1 +. 02 -. 01 -16 + 3. 8 0. 0 + 0. 4 —1 1700 L 1 0. 1 4-. 03 -. 02 — 17 + 4. 1 0. 0 + 0. 4 -1 1800 0 0. 1 +. 03 -. 02 -18 + 4. 3 0. 0 + 0. 4 -1 1900 0 0. i + . 03 -. 02 19 + 4. 5 0. 0 + 0. 4 -1 2000 0 0. 1 + . 04 -. 02 -20 + 4. 7 0. 0 + 0. 5 -1 2100 0 0. 1 + . 04 -. 03 -21 + 4. 9 0. 0 + 0. 5 -1 2200 R 1 0. 1 +. 04 03 -21 + 5. 2 0. 0 + 0. 5 -1 2300 R 1 0. 1 +. 05 03 -22 + 5. 4 0. 0 + 0. 6 -1 2400 R 1 0. 1 + . 05 04 -23 + 5. 6 0. 0 + 0. 6 -1 2500 R 1 0. 1 + . 06 -. 04 -24 + 5. 8 0. 0 + 0. 6 — 2 2600 R 2 0. 1 + . 06 05 -25 + 6. 0 0. 0 +0. 7 — 2 2700 R 2 0. 1 +. 07 -. 06 -25 + 6. 2 0. 0 + 0. 7 — 2 2800 R 2 0. 1 + . 07 -. 06 -26 + 6. 4 0. 0 + 0. 8 -2 2900 R 2 0. 1 + . 08 -. 07 -27 + 6. 6 0. 0 + 0. 8 -2 3000 R 2 0. 1 + . 08 -. 08 -28 + 6. 8 0. 0 + 0. 8 -2 3100 R 3 0. 1 + . 09 -. 08 -28 + 7. 0 0. 0 + 0. 9 — 2 3200 R 3 0. 1 +. 09 -. 09 -29 + 7. 2 0. 0 + 0. 9 — 2 3300 R 3 0. 1 +. 10 -. 10 -29 + 7. 4 0. 0 + 1. 0 -3 i 3400 R 3 0. 1 +• 11 -. 11 -30 + 7. 6 0. 0 + 1. 0 -3 3500 R 4 0. 1 +• 12 -. 12 -31 + 7. 8 0. 0 + 1. 1 -3 3600 R 4 0. 1 + . 13 -. 13 -31 + 8. 0 0. 0 + 1. 1 -3 3700 R 4 0. 1 + • 14 -. 14 -32 + 8. 2 0. 0 + 1. 2 -3 3800 R 5 0. 1 + . 15 -. 15 -32 + 8. 4 0. 0 + 1. 2 -4 3900 R 5 0. 1 + . 16 -. 16 -33 + 8. 6 -0. 1 + 1. 3 -4 4000 ♦Drift includes side jump. 43 TM 6-215 FIELD ARTILLERY Table A—Continued 1 2 3 4 5 6 7 8 9 10 yard bJD Pl c3 Probable error c3 8 o 33 metro me; on for 1C a range ’or 1-mil । ation ‘r-i > Range Elevation Fork Change in eleva change Change in range in ele Time of flight Range Deflection Slope of fall Line number o R El F C 1 mil Time £pd Slope Line yd. Pi pi Pi yd. sec. yd. yd. V- No. 4000 331. 4 9 11. 2 9 16. 4 20 2 2. 6 2 4100 342. 6 9 11. 4 9 16. 9 21 2 2. 5 2 4200 354. 0 10 11. 6 8 17. 5 21 2 2. 4 2 4300 365. 8 10 12. 0 8 18. 0 21 2 2. 3 2 4400 378. 0 10 12. 4 8 18. 6 22 2 2. 2 2 4500 390. 6 11 12. 8 8 19. L 22 2 2. 2 2 4600 403. 6 11 13. 2 7 19. 7 23 2 2. 1 3 4700 417. 2 12 13. 8 7 20. 3 23 2 2. 0 3 4800 431. 2 13 14. 4 7 20. 9 24 2 1. 95 3 4900 445. 8 14 15. 0 7 21. 5 24 2 1. 87 3 5000 461. 2 15 15. 8 6 22. 1 25 2 1. 79 3 5100 477. 4 17 16. 8 6 22. 8 26 2 1. 72 3 5200 494. 6 19 17. 8 6 23. 5 26 2 1. 64 3 5300 513. 0 21 19. 0 5 24. 3 27 2 1. 57 3 5400 532. 8 23 20. 6 5 25. 1 27 2 1. 49 3 5500 554. 4 25 22. 8 4 26. 0 28 2 1. 42 3 5600 578. 4 28 25. 4 4 26. 9 28 3 1. 34 3 5700 605. 8 34 29. 2 3 28. 0 29 3 1. 26 4 5800 638. 0 43 36. 0 3 29. 3 30 3 1. 17 4 5900 684. 0 30. 8 31 3 1. 07 4 5990 773. 0 34. 1 32 4 0. 89 5 TM 6-215 ABBREVIATED FIRING TABLES Table A—Continued 11 12 13 14 15 16 17 18 19 1 Deflection effect Complementary angle of site for each Range effect of increase of— W Range Q Dft.* Lateral wind of 1 mile per । hour(+) 0 +1 mil of site —1 mil of site One square in weight of A Ai iA iA yd. yd. yd. yd. yd. yd. R 5 0. 1 + • 16 -. 16 -33 + 8. 6 -0. 1 + 1. 3 — 4 4000 R 5 R 6 R 6 R 6 0. 1 0. 1 0. 2 0. 2 + •• 17 + • 19 + • 21 +. 23 -. 17 -. 18 -. 19 -. 21 -34 -35 -35 -36 + 8. 8 + 9. 0 + 9. 3 + 9. 5 -0. 1 -0. 1 -0. 1 -0. 1 + 1. 3 + 1. 4 + 1.4 + 1. 5 — 4 -4 -4 -5 4100 4200 4300 4400 R 7 0. 2 +. 25 -. 23 -37 + 9. 7 -0. 1 + 1. 5 -5 4500 R 7 R 8 R 8 R 9 0. 2 0. 2 0. 2 0. 2 + . 27 + . 29 +. 32 + . 36 -. 25 -. 27 -. 29 -. 32 -38 -38 -39 -39 + 9. 9 + 10. 1 + 10. 3 + 10. 5 -0. 1 -0. 1 -0. 1 -0. 1 + 1. 6 + 1. 6 + 1. 7 + 1. 7 -5 -5 -6 -6 4600 4700 4800 4900 R 10 0. 2 + . 41 -. 36 -40 + 10. 7 -0. 1 + 1. 8 -6 5000 R 11 R 11 R 12 R 12 0. 2 0. 2 0. 2 0. 2 + . 46 + . 52 + . 60 +■ 71 -. 40 -. 45 -. 51 -. 58 -40 -41 -41 -42 + 10. 9 + 11. 1 + 11. 3 + 11. 5 -0. 1 -0. 1 -0. 1 -0. 1 + 1. 9 + 2. 0 + 2. 0 + 2. 1 -6 -7 -7 -7 5100 5200 5300 5400 R 13 0. 2 +. 84 -. 68 -42 + 11. 7 -0. 1 + 2. 2 -8 5500 R 14 R 15 R 17 R 19 0. 3 0. 3 0. 3 0. 3 + 1. 01 + 1. 36 + 2. 72 -. 80 -. 95 -1. 18 -1. 60 -42 -43 -43 -43 + 11. 9 + 12. 1 + 12. 2 + 12. 3 -0. 1 -0. 1 -0. 1 -0. 1 + 2. 3 + 2. 5 + 2. 7 + 3. 0 Illi CO CO 00 00 5600 5700 5800 5900 R 23 0. 3 — -3. 09 -43 + 12. 4 -0. 1 + 3. 6 -10 5990 *Drift includes side jump. 45 TM 6-215 FIELD ARTILLERY Table B.—Change in velocity due to change in temperature of powder— Temperature of powder, F 0 10 20 30 40 50 60 70 80 90 100 Change in velocity, feet per second -19 -17 -14 -12 -9 -6 —3 0 + 3 + 6 + 9 Table C.—Cant of carriage axle, deflection effect in mils due to— Range, yards 1000 2000 3000 4000 4500 5000 Cant of 10 mils, effect 0.7 1. 5 2.4 3. 4 4. 1 4. 9 Range, yards 5000 5500 5600 5700 5800 5900 5990 Cant of 10 mils, effect 4. 9 6. 1 6. 5 6. 91 7. 3 8.0 9. 7 Note.—Right wheel above left causes left deflection effect. The deflection due to cant is automatically compensated for by cross-leveling the sight, and this table is to be used only in the event the sight cannot be so crossleveled. 46 TM 6-215 ABBREVIATED FIRING TABLES CHARGE 4 Muzzle velocity: 939 f/s. Powder charge: Charge consists of base section and three increments, numbered respectively 1, 2, 3, and 4. The cartridge cloth is dyed green. The igniter pad is on the rear end of the base section. Maximum range: 7,360 yards. (Data for ranges 3000-7000 included herein.) (7F cAG7K(iAIW W IGNITER < /(/3OZ.GR.A-I ||| feLKPDR.LOTCT > I55MM-H »L W r. V'/7 fl - —rmn-m—n CHARGE M A I CHARGE Ml Al — ..... • "|i—rrn—rn-rr 47 TM 6-215 FIELD ARTILLERY Table A 1 2 3 4 5 6 7 8 9 10 ' I Change in elevation for 100-yard change in range change Probable error message Range Elevation Fork Change in range for 1-mil < in elevation Time of flight Range Deflection Slope of fall Line number of metro : R El F c 1 mil Time epr ^pd Slope Line yd. pi ip Ip yd. sec. yd. yd. V- No. 3000 178. 2 4 6. 8 15 10. 3 16 2 5. 1 1 3100 185. 0 5 7. 0 14 10. 7 17 2 4. 9 1 3200 192. 0 5 7. 0 14 11. 1 17 2 4. 7 1 3300 199. 0 5 7. 0 14 11. 4 17 2 4. 6 1 3400 206. 2 5 7. 2 14 11. 8 18 2 4. 4 1 3500 213. 4 5 7. 2 14 12. 2 18 2 4. 2 1 3600 220. 6 6 7. 4 14 12. 6 19 2 4. 1 2 3700 228. 0 6 7. 4 13 13. 0 19 2 3. 9 2 { 3800 235. 4 6 7. 6 13 13. 4 19 2 3. 8 2 3900 243. 0 6 7. 6 13 13. 8 20 2 3. 7 2 4000 250. 8 6 7. 8 13 14. 2 20 2 3. 5 2 4100 258. 6 7 7. 8 13 14. 6 21 2 3. 4 2 4200 266. 4 7 8. 0 13 15. 0 21 2 3. 3 2 4300 274. 4 7 8. 0 12 15. 4 21 2 3. 2 2 4400 282. 6 7 8. 2 12 15. 8 22 2 3. 1 2 4500 291. 0 7 8. 4 12 16. 3 22 2 3. 0 2 4600 299. 4 8 8. 4 12 16. 7 23 2 2. 9 2 4700 308. 0 8 8. 6 12 17. 2 23 2 2. 8 2 [ 4800 316. 6 8 8. 8 11 17. 6 23 2 2. 7 2 4900 325. 4 9 9. 0 11 18. 1 24 2 2. 7 2 5000 334. 4 9 9. 2 11 18. 5 24 2 2. 6 2 5100 343. 6 10 9. 2 11 19. 0 25 3 2. 5 2 5200 352. 8 10 9. 4 11 19. 5 25 3 2. 4 3 5300 362. 4 10 9. 6 10 19. 9 25 3 2. 3 3 5400 372. 2 11 10. 0 10 20. 4 26 3 2. 3 3 5500 382. 2 11 10. 2 10 20. 9 26 3 2. 2 3 5600 392. 4 12 10. 4 10 21. 4 27 3 2. 1 3 5700 403. 0 12 10. 6 9 21. 9 27 3 2. 1 3 5800 413. 8 12 11. 0 9 22. 4 27 3 2. 00 3 5900 425. 0 13 11. 4 9 22. 9 28 3 1. 94 3 6000 436. 6 13 11. 8 9 23. 5 28 3 1. 88 3 6100 448. 6 14 12. 2 8 24. 1 29 3 1. 82 3 6200 461. 0 14 12. 6 8 24. 7 29 3 1. 76 g 6300 473. 8 15 13. 2 8 25. 3 29 3 1. 70 3 6400 487. 2 16 13. 8 7 25. 9 30 3 1. 64 3 6500 501. 4 17 14. 6 7 26. 6 30 3 1. 58 3 6600 516. 4 18 15. 6 6 27. 3 31 3 1. 52 4 6700 532. 4 20 16. 8 6 28. 1 31 3 1. 46 4 6800 549. 6 22 18. 2 6 28. 9 31 4 1. 40 4 6900 568. 6 25 20. 0 5 29. 7 32 4 1. 34 4 7000 590. 0 29 22. 4 5 30. 6 32 4 1. 28 4 48 TM 6-215 ABBREVIATED FIRING TABLES Table A-—Continued 11 i 12 13 14 15 16 17 18 19 1 Deflection effect Complementary angle of site for each Range effect of increase of— C/3 o £ > •4 k>» a S3 40 □ Pl ce o 'c/5 ^1 0* bj) co a 5 P © s+ "P »-< £ a o T3 a <+ o © a CD TP ‘S o 5 73 > a3