PART IV.
Reading edition
RANGE, ELEVATION, ETC., OF BRASS ORDNANCE.
SOLID SHOT. COMMON CASE SHOT.
Elevation. Med. 12 Pr. 9 Pr. Long 6 Pr. Light 12 Pr. Ditto 6 Pr. Heavy 3 Pr. Elevation. Med. 12 Pr. 9 Pr. Long 6 Pr. Light 12 Pr. Ditto 6 Pr. Heavy 3 Pr.
degrees. yards. yards. degrees. yards. yards.
P. B. 300 200 P. B. 150 100
¼ 400 300 ¼ 175 125
½ 500 400 ½ 200 150
¾ 600 500 ¾ 225 175
1 700 600 1 250 200
1¼ 775 650 1¼ 275 225
1½ 850 700 1½ 300 250
1¾ 925 750 1¾ 325 275
2 1000 800 2 350 300
2¼ 1050 850
2½ 1100 900
2¾ 1150 950
3 1200 1000
3¼ 1250 1050
3½ 1300 1100
3¾ 1350 1150
4 1400 1200
24 Pr. Howitzer. 12 Pr. Howitzer. 5½ in. Howitzer.
Charge 2½ lb. Charge 1½ lb. Heavy | Light
2 lb. Charge 1 lb.
Com. Shells. C. Case. Com. Shells. C. Case. Com. Shells.
Elev-ation. Fuze.* Range. Elev-ation. Range. Elev-ation. Fuze.* Range. Elev-ation. Range. Elev-ation. Range. Range.
deg. 10ths yds. deg. yds. deg. 10ths yds. deg. yds. deg. yds. yds.
P. B. 250 P. B. 150 1 1 400 P. B. 100 P. B. 250 150
¼ 300 ¼ 175 1¼ 1½ 450 ¼ 125 1 400 300
½ 350 ½ 200 1½ 2 500 ½ 150 2 550 450
¾ 400 ¾ 225 1¾ 2½ 550 ¾ 175 3 700 600
1 1 450 1 250 2 3 600 1 200 4 850 750
1¼ 1½ 500 1¼ 275 2¼ 3½ 650 1¼ 225 5 975 850
1½ 2 550 1½ 300 2½ 4 700 1½ 250 6 1100 950
1¾ 2½ 600 1¾ 325 2¾ 4½ 750 1¾ 275 7 1225 1050
2 3 650 2 350 3 5 800 2 300 8 1350 1150
2¼ 3½ 700 2¼ 375 3¼ 5½ 850 9 1450 1200
2½ 4 750 2½ 400 3½ 6 900 10 1550 1250
2¾ 4½ 800 3¾ 6¼ 950 11 1650 1300
3 5 850 4 7 1000 12 1750 1350
3¼ 5½ 900 4¼ 7½ 1025
3½ 6 950 4½ 7¾ 1050
3¾ 6½ 1000 4¾ 8 1075
4 7 1025 5 8¼ 1100
5¼ 8½ 1125
5½ 8¾ 1150
* Fuze—Old pattern.
Ranges, Elevation, &c., of 8-inch Howitzer.
Common Shells. Shrapnell Shells. Ricochet firing.
Charge. Fuze. Elevation. Range. Fuze. Elevation. Charge. Elevation. Range. Fuze.
lb. inches deg. yards. inches deg. lb. deg. yards. inches
4 ·3 2 450 .. .. .. .. .. ..
·4 2½ 600 ·3 2⅝ 1 9·5 400 ·85
·52 3 750 ·5 3½ 1·5 6· 400 ·8
·65 3¾ 900 ·7 4½ 1·5 9· 600 1·
·8 4½ 1050 ·9 5⅝ 2 6·25 600 ·9
·95 5⅜ 1200 1·1 6⅞ 2·5 5·5 600 ·75
1·1 6¼ 1350 1·35 8¼ 2 8·5 800 1·2
1·3 7¼ 1500 1·6 9¾ 2·5 6·25 800 1·
1·5 8¼ 1650
1·75 9⅜ 1800 1 34·5 1170
2· 10½ 1950 2 34·5 2010
2·3 11¾ 2100
2·6 13 2250 3 5 900
3· 14⅜ 2400 3 10 1200
3·4 15¾ 2550 3 15 1930
3·9 17¼ 2700
32 Pr. Brass Howitzer.
Range. Common Case. Common Shell. Shrapnell Shell. Range. Common Case. Common Shell. Shrapnell Shell.
Yards. Elev- ation. Elev- ation. Fuze. Elev- ation. Fuze. Yards. Elev- ation. Elev- ation. Fuze. Elev- ation. Fuze.
200 P B 1150 4⅜ ·8 4¼
300 1° 1200 4⅞ ·9 4⅝ ·8
400 2° ¾ ·2 P B 1250 5½ ·9 5°
450 ⅞ ·2 ¼ ·2 1300 .. .. ·9 5¼ ·9
500 1° ·2 ½ 1350 .. .. 1·0 5⅝
550 1¼ ·3 1° 1400 .. .. 1·0 6° 1·0
600 1⅜ ·3 1¼ 1450 .. .. 1·1 6¼
650 1½ ·3 1⅝ ·3 1500 — 7½ 1·1 6⅝
700 1¾ ·4 2° 1550 1·2 7°
750 2° ·4 2¼ 1600 1·3 7¼
800 2¼ ·5 2½ ·4 1650 1·4 7⅝
850 2½ ·5 2¾ 1700 1·5 8°
900 2¾ ·6 3° ·5 1750 1·6
950 3° ·6 3¼ 1800 — 9½ 1·7
1000 3¼ ·7 3½ ·6 1850 1·8
1050 3⅝ ·7 3¾ 1900 1·9
1100 4° ·8 4° ·7 2000 2·0
Range, Elevation, &c., of Brass Ordnance.
SHRAPNELL SHELLS.
12 Pr. Medium. 9 Pr. Light 6 Pr.
Shell filled 10 lb. 13¼ oz. Shell filled 8 lb. 1¼ oz. Shell filled 5 lb. 7¼ oz.
Shell empty 5 lb. 10 oz. Shell empty 4 lb. 9½ oz. Shell empty 3 lb. 2 oz.
Number of Balls 63 Number of Balls 41 Number of Balls 27
Letter & Eleva- Range. Letter & Eleva- Range. Letter & Eleva- Range.
Length tion. Length tion. Length tion.
of Fuze. from to of Fuze. from to of Fuze. from to
in.10ths. deg. yds. yds. in.10ths. deg. yds. yds. in.10ths. deg. yds. yds.
B ·2 1⅜ 660 960 B ·2 1⅜ 640 920 1 380 640
C ·3 1⅞ 820 1110 C ·3 1⅞ 800 1060 B ·2 1¼ 570 800
D ·4 2¼ 960 1230 D ·4 2¼ 930 1180 C ·3 1⅝ 720 930
E ·5 2¾ 1080 1340 E ·5 2¾ 1050 1290 D ·4 2¼ 845 1045
·6 3¼ 1195 1445 ·6 3¼ 1160 1390 E ·5 2⅞ 955 1145
·7 3¾ 1301 1545 ·7 3¾ 1260 1480 ·6 3⅜ 1060 1240
·8 4⅜ 1415 1645 ·8 4⅜ 1360 1570 ·7 4 1160 1330
·9 5⅛ 1520 1740 ·9 5⅛ 1455 1655 ·8 4⅝ 1255 1415
1 · 5¾ 1620 1830 1 · 5¾ 1550 1740 ·9 5¼ 1345 1500
1 ·1 6⅜ 1720 1920 1 ·1 6⅜ 1640 1820 1 · 5⅞ 1430 1580
1 ·2 7 1815 2005 1 ·2 7 1725 1895 1 ·1 6⅝ 1510 1655
1 ·3 7⅝ 1905 2085 1 ·3 7⅝ 1805 1965 1 ·2 7¼ 1585 1725
1 ·4 8¼ 1990 2160 1 ·4 8¼ 1885 2035 1 ·3 7⅝ 1655 1785
1 ·5 8⅞ 2070 2230 1 ·5 8¾ 1960 2100 1 ·4 8¼ 1720 1840
1 ·6 9⅜ 2140 2290 1 ·6 9⅜ 2030 2160 1 ·5 8⅞ 1780 1890
1 ·7 10 2200 2340 1 ·7 10 2095 2215 1 ·6 9⅝ 1835 1940
1 ·8 10¾ 2165 2275 1 ·7 10¼ 1885 1980
1 ·8 11 1953 2020
SHRAPNELL SHELLS.
Part 2 of 2
24 Pr. Howitzer. 12 Pr. Howitzer.
S. filled 21 lb. 4 oz. S. filled 10 lb. 13¼ oz.
S. empty 11 lb. 1 oz. S. empty 5 lb. 10 oz.
No. of Balls 129 No. of Balls 63
Letter & Eleva- Letter & Eleva-
Length tion. Range. Length tion. Range.
of Fuze. of Fuze.
in.10ths. deg. yds. in.10ths. deg. yds.
·1 1 450 ·1 1¼ 450
·1½ 1¼ 500 ·1½ 1½ 500
B ·2 1½ 550 B ·2 1¾ 550
·2½ 1¾ 600 ·2½ 2 600
C ·3 2 650 C ·3 2¼ 650
·3½ 2¼ 700 ·3½ 2½ 700
D ·4 2½ 750 D ·4 2¾ 750
·4½ 2¾ 800 ·4½ 3 800
E ·5 3 850 E ·5 3¼ 850
·5½ 3¼ 900 ·5½ 3½ 900
·6 3½ 950 ·6 3¾ 950
·6½ 3¾ 1000 ·6½ 4 1000
·7 4 1050 ·7 4¼ 1025
·7½ 4¼ 1100 ·7½ 4½ 1050
·8 4½ 1125 ·7¾ 4¾ 1075
·8½ 4¾ 1150 ·8 5 1100
·9 5 1175 ·8¼ 5¼ 1125
·9½ 5¼ 1200 ·8½ 5½ 1150
·8¾ 5¾ 1175
·9 6 1200
Ricochet Practice with Brass Ordnance.
Chg. = Charge. Ele. = Elevation.
Solid Shot. Common Shells.
Range in yards. 12 Pr. 9 Pr. 24 Pr. 12 Pr. 5½ in. 5½ in. 4⅖ in.
Medium Gun. Howitzer Howitzer Howitzer heavy Mortar Mortar
Gun. Shell, 16 lb. Shell, 8 lb. Shell, 16 lb. Shell, 16 lb. Shell, 8 lb.
Chg. Ele. Chg. Ele. Chg. Ele. Chg. Ele. Chg. Ele. Chg. Ele. Chg. Ele.
oz. deg. oz. deg. lb. oz. deg. oz. deg. lb. oz. deg. oz. deg. oz. deg.
6 7½
400 9 4¾ 12 5 8 14½ 5 14½
8 4 8 8
6 6½ 7 5 8 9 12 7
5 7 6 6¼ 10 7½
5 6¾ 11 6 10 9
500 12 5¼ 8 11
14 5
7 6½ 9 7¾ 6 7
600 6 7½ 12 6½ 8 6 1 6¾
5 9½ 1 4¾ 10 5 12 9
Note.—When Shot are fired from the 24 Pounder and 12 Pounder Howitzers, the Elevation must be about half a degree more than when Shells are used.
CHARGES FOR THE ROYAL NAVY.
For Boats.
lb. oz.
{ Howitzer { 24 Pounder 2 8
Cartridges { 12 Pounder { Heavy 2 0
filled with { { Light 1 4
Powder { Gun 6 Pr. Light { 1 8
{ { 0 4
{ Carronade 12 Pounder 1 0
Charges for the Royal Navy.
High; Medium; Low: equivalent to Distant; Full; Reduced.
Gun. High. Medium. Low. Proof.
cwt. lb. lb. lb. lb.
18-Pounder. 42 6 4½ 3 15
” ” 38 6 4½ 3 15
” ” 22 3 2 7
” ” 20 3 2 7
” ” 15 2 — 5
24-Pounder. 50 8 6 4 18
” ” 48 8 6 4 18
” ” 33 6 4 12
” ” 20 2½ — 6
32-Pounder*. 64 10 8 6 21½
” ” 58 10 8 6 21½
” ” 56 10 8 6 21½
” ” 46 8 6 — 21½
” ” 48 } 8 6 5 21½
” ” 50 }
” ” 50 A 8 6 4 18
” ” 45 B 8 7 5 16
” ” 42 C 6 4 2½ 14
” ” 41 6 4 2½ 12
” ” 40 6 4 2½ 12
” ” 32 5 3 and 4 2½ 10
” ” 25 4 2½ 9
” ” 25 4 2½ 9
42-Pounder. 84 14 10 5 25
” ” 75 14 10 5 25
” ” 67 — 10 6 23
56-Pounder. 98 16 10 5 28
” ” 87 14 10 5 25
68-Pounder. 112 20 10 5 30
” ” 95 16 12 8 28
” ” 87 14 10 6 25
8-Inch Gun. 65 10 8 5 20
” ” 60 10 8 5 20
” ” 52 8 — 5 16
” ” 50 — 8 5 14
10-Inch Gun. 112 16 — — 25
” ” 86 12 — 6 20
* Charge of powder, for firing 32-pounder shells, 8 lb.
In changing the charge from Distant to Full, add ¼ degree elevation as far as 1000 yards, and half a degree beyond that range.
Double Shotting.—Double shotting may be employed with 32-pounder guns of
56 cwt. charge 6 lb. up to 400 yards.
42 ” ” 4 lb. ” 300 ”
25 ” ” 2½ lb. ” 200 ”
With double shot and reduced charge, give double the elevation, and half a degree additional, for the reduced charge.
Range, Charge, Elevation, &c., of Iron Ordnance.
P.B. = Point Blank Diam. = Diameter
Nature. Weight. Length. Diam. of the bore. Charge of powder. Range in yards.
P.B. 1° 2° 3° 4° 5° 6°
GUNS. cwt. ft. in. in. lb. oz.
42 Pr. 85 10 9·60 14 400 940 1340 1620 1840 2050 2250
32 Pr. 63 9 7 6·41 10 10½ 380 760 1130 1455 1730 1950 2160
56 9 6 6·41 10 10½ 380 760 1130 1455 1730 1950 2160
48 8 6·41 8 330 680 1015 1300 1540 1740 1840
40 7 6 6·35 6 340 675 985 1260 1500 1700 1800
* 32 6 6 6· 3 5 330 670 945 1210 1450 1640 1730
* 25 6 6· 3 4 225 485 735 995 1260 1500 1630
25 5 4 6· 3 4 225 485 735 995 1260 1500 1630
24 Pr. 50 9 6 5·82 8 360 755 1125 1417 1670 1850 2000
48 9 5·82 8 360 755 1125 1417 1670 1850 2000
40 7 6 5·82 8 340 730 1080 1377 1620 1800 1950
33 6 6 5·82 6 260 530 805 1082 1350 1560 1760
18 Pr. 42 9 5·29 6 360 730 1080 1377 1600 1780 1960
38 8 5·29 6 340 710 1075 1347 1560 1730 1900
12 Pr. 34 9 4·62 4 360 720 1075 1337 1540 1700 1850
29 7 6 4·62 4 340 710 1040 1307 1500 1650 1800
9 Pr. 26 7 6 4· 2 3 330 685 1015 1278 1460 1600 1730
6 Pr. 17 6 3·66 2 320 655 985 1238 1400 1520 1610
CARRONADES.
68 Pr. 36 6 4 8·05 5 10½ 270 540 812 1042 1240 1420 1570
42 22 4 6 6·84 3 8 240 515 810 983 1180 1350 1880
32 17 4 6·25 2 10 235 485 705 905 1100 1260 1400
24 13 3 9 5·68 2 225 435 650 826 1000 1150 1300
18 10 3 4 6·16 1 8 220 430 620 787 950 1100 1250
12 6 2 8 4·62 1 205 375 580 738 880 1000 1100
* Bored-up guns.
Carronades.
Nature 68 Pr. 42 32 24 18 12
Charge lb. oz. lb. oz. lb. oz. lb. lb. oz. lb.
5 8 3 8 2 10 2 1 8 1
yards.
P. B. 450 400 330 300 270 230
1 Degree 650 600 560 500 470 400
2 ” ” 890 860 830 780 730 580
3 ” ” 1000 980 900 870 800 740
4 ” ” 1100 1020 970 920 870 810
5 ” ” 1280 1170 1080 1050 1000 870
Range, &c., of Iron Ordnance.
SHRAPNELL SHELLS.
68 Pr.Carronade. 8 in. Howitzer. 24 Pr. Gun. 18 Pr. Gun.
lb. oz. lb. oz. lb. oz. lb. oz.
Charge 4 0 Charge 4 0 Charge 5 0 Charge 4 8
S. filled 61 4 S. filled 61 13 S. filled 21 5 S. filled 15 11
S. empty 32 2 S. empty 32 2 S. empty 11 0 S. empty 8 6
No. of Balls 337 No. of Balls 337 No. of Balls 128 No. of Balls 90
Elevation. Fuze. Elevation. Fuze. Elevation. Fuze. Elevation. Fuze. Range.
deg. tenths. deg. tenths. deg. tenths. deg. tenths. yards.
2½ 4 2¾ 3½ 1¼ 2 1¼ 2 650
3½ 6 3 6 1¾ 3½ 2 4 900
5 8½ 6 10 2½ 5 3 5¾ 1100
Range, Elevation, &c., of 12, 10, and 8 inch Guns, 32 Pr. Carronade Gun, and 10, and 8 inch Iron Howitzers.
P. B. = Point Blank.
Nature of Ordnance. Length. Weight. Charge. Elevation in degrees; Range in yards; Flight in seconds.
P.B. 1° 2° 3° 4° 5° 6° 7°
feet. in. cwt. qrs. lb. oz.
12 in. Gun (Hollow shot) 8 4 90 3 12 240 540 790 1020 1250 1400 1550
{ 7 6 57 3 7 210 460 720 935 1160 1350 1500
10 Do. (H. S.) { 8 4 62 1 8 250 570 810 1030 1230 1400
{ 9 4 84 12 325 630 930 1200 1460 1700
8 Do. (H. S.) 6 8½ 50 7 210 320 570 830 1130 1300
8 Do. (Solid shot) 8 6 60 9 7 340 640 960 1190 1300 1500
8 Do. } 9 65 10 300 580 940 1220 1480 1700 1880 2120
Time of Flight } ¾” 2” 3” 4¼” 5½” 7” 8” 8¾”
Ditto. (Hollow shot) { 9 65 12 370 700 1050 1230 1540 1700 1831 1980
Time of Flight { 1” 2¼” 3” 4¼” 6” 6½” 7¾” 8”
32 Pounder Carronade Gun 5 25 4 200 470 730 960
10 inch iron Howitzer 5 40 7 600 1200 1320
8 inch Ditto. 4 21 4 450 730 975
Range, Elevation, &c., of 12, 10, and 8 inch Guns, 32 Pr. Carronade Gun, and 10, and 8 inch Iron Howitzers.
(Part 2 of 2)
Nature of Ordnance. Length. Weight. Charge. Elevation in degrees; Range in yards; Flight in seconds.
8° 9° 10° 11° 12° 13° 14° 15°
feet. in. cwt. qrs. lb. oz.
12 in. Gun (Hollow shot) 8 4 90 3 12
{ 7 6 57 3 7
10 Do. (H. S.) { 8 4 62 1 8
{ 9 4 84 12
8 Do. (H. S.) 6 8½ 50 7
8 Do. (Solid shot) 8 6 60 9 7
8 Do. } 9 65 10 2290 2430 2510 2710 2930 2990 3140 3250
Time of Flight } 9¾” 10½” 11½” 12¼” 12½” 13” 13½” 14”
Dittoo. (Hollow shot) { 9 65 12 2090 2310 2400 2510 2720 2830 2870 2220
Time of Flight { 8¾” 10” 10½” 11½” 12½” 13½” 14” 15½”
32 Pounder Carronade Gun 5 25 4
10 inch iron Howitzer 5 40 7 1500 1926 2078
8 inch Ditto. 4 21 4 1227 1506 1725
The above Ranges for the 12 and 10 inch Guns are with hollow shot, weighing respectively 112 lb. and 84 lb. The 8 inch Gun carries either hollow shot, plugged, 48 lb.; or shell, 46 lb.
Vide also Naval Gunnery. Table of Tangent Practice, 8 inch Gun.
56 Pounder Gun, and 68 Pounder Gun.
Weight, Ranges, &c.
Gun. Shot. Charge. P B 1° 2° 3° 4° 5° 6° 8° 10° 12° Above Plane.
cwt. lb. lb. yds. yds. yds. yds. yds. yds. yds. yds. yds. yds. feet. in.
56 Pr. 98 S S 16 490 930 1340 1720 2000 2200 2400 2740 3040 3320 5
87 S S 14 380 900 1310 1660 1940 2100 2310 2580 2940 3270 8
68 Pr. 112 S S 20 400 980 1400 1760 1980 2240 2480 2840 3130 3400 8
95 S S 15 310 700 1070 1430 1710 1930 2130 2520 2890 3180 5 4
95 Shell 16 350 850 1250 1560 1840 2100 2350 2690 3000 3300 5 4
87 S S 14 300 680 1050 1360 1650 1900 2140 2490 2820 3150 8
87 Shell 14 310 710 1080 1350 1610 1850 2080 2450 2800 3140 8
8 Inch Gun.
Length, 9 feet; Weight, 65 cwt.; Height of gun above the plane, 5 feet 7 inches.
Nature Charge. Eleva- First Flight. Second Extreme Time of Number of
of shot. tion. graze. graze. range. flight. grazes.
lb. Degrees. Yards. Sec. Yards. Yards. Sec.
Solid 10 P. B. 315 1” 901 3207 20” 23
10 1° 660 2” 1006 2803 19” 18
10 1½° 818 3” 1240 2433 16” 13
9 P. B. 343 1” 776 2683 17” 12
9 1° 615 2” 970 2483 15” 10
RICOCHET FIRING.
1. When adopted in the field, the guns should seldom be elevated above 3 degrees, as the objects fired at are generally cavalry and infantry, and the lower the angle the longer will the shot preserve its force, and have effect.
2. In the ricochet of a fortification of any kind, the elevation should seldom exceed 10 degrees to throw the shot over the parapet a little higher than the level of the battery; and, on the whole, the best elevation to enfilade a work is from 6 to 9 degrees, measured above the crest of the parapet with corresponding charges.
3. The charge, and elevation being known for any range, when the gun and parapet are on the same level, the same charge, and elevation may be used so long as the difference of level does not exceed one-twentieth of the horizontal distance between them, the elevation being given by the tangent scale, and the gun laid at the parapet, whether above or below its own level.
Ricochet Practice with Iron Ordnance.
Round Shot.
68 Pr. Carronade.* 24 Pr. Gun, 9 Feet. 18 Pr. Gun, 8 Feet. 12 Pr. Gun, 8½ Feet.
Range in yards. Charge. Eleva- tion. Charge. Eleva- tion. Charge. Eleva- tion. Charge. Eleva- tion.
lb. oz. deg. lb. oz. deg. lb. oz. deg. lb. oz. deg.
400 12 6¼ 9 6½ 8 4½
10 7¾ 6 6½
8 11
600 1 12 7 6 6 1 5¼ 12 4¾
1 8 8¾ 1 8 4 12 7 10 6
1 6½ 8 7¾
800 2 3¾ 1 8 4¼ 1 4½
1 8 5½ 1 7 12 6½
* Note.—When Shells are fired from the 68 Pounder Carronade, the Elevation must be decreased about half a degree.
Part 2 of 2
Common Shell.
10-inch Howitzer Shell, 92 lb. 8-inch Howitzer Shell, 46 lb. 24 Pr. Howitzer Shell, 16 lb.
Range in yards. Charge. Eleva- tion. Charge. Eleva- tion. Charge. Eleva- tion.
lb. oz. deg. lb. oz. deg. lb. oz. deg.
400 2 8 6¼ 1 8 6 9 4¾
2 8½ 1 9½ 6 7½
600 3 6½ 1 8 8¼ 1 4¾
2 8 8¼ 1 4 10 12 5¼
9 7½
800 4 6¼ 2 8 6¼
3 8 7½ 2 6½
MORTARS.
Practical rules.
To find the Charge for a given Range at 45° elevation.
13 inch Mortar.—To the range, in yards, add half the range, multiply the sum by ·03 for the charge, in ounces.
10 inch Mortar.—When the range is under 1350 yards, add to the range 160, and multiply by ·02; and if the range is over 1350 yards, add one-fifth of the range, and multiply by ·02 for the charge, in ounces.
8 inch Mortar.—To the range, in yards, add 20, and the sum multiplied by ·015 will give the charge, in ounces.
5½ inch Mortar.—To the range in yards, add 150, and multiply by ·08, for the charge, in ounces.
4⅖ inch Mortar.—To the range in yards add 300, and multiply by ·06, for the charge, in drams.
To find the Time of flight, the range being given. Divide the square root of the range, in feet, by 4·5 for the time of flight, in seconds.
To find the Range, the Time of flight being given. Multiply the time of flight, in seconds, by 4·5, and square the product for the range, in feet.
To find the length of Fuze,[8] for a given range. Multiply the time of flight, in seconds, by ·22, for the 13, and 10 inch mortars, and by ·24 for 8, 5½, and 4⅖ inch mortars, for the length of fuze, in tenths.
Mortar Practice at 15°, 25°, and 45° Elevation. 1838.
13 INCH IRON. 10 INCH IRON. 8 INCH IRON.
Weight 36 cwt. Weight 16 cwt. 2 qrs. Weight 8 cwt. 1 qr.
*Shell filled 200 lb. Shell filled 92 lb. Shell filled 46 lb.
Burst. powder 6 lb. 12 oz. Burst. powder 2 lb. 10 oz. Burst. powder 1 lb. 14 oz.
Blowing powder 2 oz. Blowing powder 1½ oz. Blowing powder 1 oz.
Eleva- tion. Charge. Fuze. Range. Eleva- tion. Charge. Fuze. Range. Eleva- tion. Charge. Fuze. Range.
degs. lb. oz. in. yds. degs. lb. oz. in. yds. degs. lb. oz. in. yds.
45 2 1½ 1·9 450 45 1 ½ 1·9 450 15 14 ·8 500
2 3 2· 500 1 2 2· 500 1 1· 550
2 4¾ 2·1 550 1 3¼ 2·1 550 1 2 1·1 600
2 6 2·2 600 1 4¾ 2·2 600 45 9½ 1·9 450
2 7¾ 2·3 650 1 6 2·3 650 10¾ 2· 500
2 9½ 2·4 700 1 7½ 2·4 700 12½ 2·1 550
2 11¾ 2·45 750 1 9 2·45 750 13¾ 2·2 600
2 14 2·5 800 1 10 2·5 800 14½ 2·3 650
3 ½ 2·55 850 1 11 2·55 850 15½ 2·4 700
3 3 2·6 900 1 12 2·6 900 1 2·45 750
3 5½ 2·65 950 1 13 2·65 950 1 ½ 2·5 800
3 8 2·7 1000 1 14 2·7 1000 1 1¼ 2·55 850
3 10 2·75 1050 1 15¼ 2·75 1050 1 2 2·6 900
3 12 2·8 1100 2 ½ 2·8 1100 1 2¾ 2·65 950
3 14 2·85 1150 2 1¾ 2·85 1150 1 3½ 2·7 1000
4 2·9 1200 2 3 2·9 1200 1 4 2·75 1050
4 5 3· 1300 1 4¾ 2·8 1100
4 15 3·2 1500 1 5¼ 2·85 1150
5 10 3·4 1700 1 6 2·9 1200
* The Shells were filled with sand.
Part 2 of 2
5½ INCH BRASS. 4⅖ INCH BRASS.
Weight 1 cwt. 1 qr. 10 lb. Weight 3 qrs. 19 lb.
Shell filled 16 lb. Shell filled 8 lb.
Burst. powder 10 oz. Burst. powder 5 oz.
Blowing powder ½ oz. Blowing powder ½ oz.
Eleva- tion. Charge. Fuze. Range. Eleva- tion. Charge. Fuze. Range.
degs. lb. oz. in. yds. degs. lb. oz. in. yds.
15 6 ·7 350 15 4 8 ·8 450
7 ·75 400 4 12 ·85 500
7 8 ·8 450 25 4 1·1 540
8 ·85 500
25 5 8 1·1 480
45 4 8 300 45 2 6 1·65 300
4 12 350 2 9 1·7 350
5 1·75 400 2 12 1·75 400
5 4 1·8 450 3 1·8 450
5 8 1·85 500 3 4 1·85 500
5 12 1·9 550 3 8 1·9 550
6 1·95 600 3 12 1·95 600
Greatest Charges, and Ranges.
lb. oz. yds.
13 Inch, Sea 20 0 4200
10 ” 10 8 4000
13 Inch, Land 9 0 2900
10 ” 4 0 2400
8 ” 2 0 2000
5½ ” 9 1200
4⅖ ” 4·5 1000
Distance from the parapet of a battery, the parapet being 8 feet high, for Mortars at the following elevations:—
Elevation 45 30 20 15 10 degrees.
Distance 12 13 21 30 40 feet.