268 
PRINCIPLES OP GUNNERY. 
The remaining velocity at 100 yds. = 300 ft. can be found by Table I. 
thus: 
S v = ^ 1353 + 2-953 x 300 = 1584 + 885*9 = 2469*9 ft. 
or velocity at 100 yds. = 1198 f.s. 
Then time over 100 yds. can be found by Table II. thus: 
2*953 T= T im - T im = 1*7416 - 1*0461 = *6955 ; 
or time over 100 yds. = *2356 sec. 
Then the height of the trajectory at 100 yds. can be found by sub¬ 
stituting in the formula 
where T— 1*432 and t — *2356. 
Thus, 
Vm 
32*19 x *2356 
X 1*1964 = 4*537 ft 
In a similar manner, the height of the trajectory at 200, 300, and 
400 yds. may be found. 
Trajectory of Martini-Henry and Mauser Rifle at 500yds. 
IOO 200 300 *00 BOO YDS. 
Martini-Henry. 
Mauser. 
Distance. 
Velocity. 
Time of 
flight. 
Height of 
trajectory. 
Velocity. 
_ 
Time of | Height of 
flight, j trajectory. 
1 • 
yds. 
O. 
f.s. 
1353 
1198 
1075 
994 
937 
889 
secs. 
•0000 
•2356 
•5021 
•7934 
1-1040 
1-4320 
ft. 
0 
4- 54 
7- 52 
8- 16 
5- 83 
0 
f.s. 
1526 
1312 
1143 
1023 
950 
892 
secs. 
•0000 
•2127 
•4578 
•7358 
1*0400 
1-3670 
ft. 
0 
3*95 
6-70 
7-47 
5-47 
0 
100. 
200. 
300. 
400. 
500. 
Weight of bullet = 480 grs .; diameter of 
bullet = -45 in. 
Weight of bullet = 382 grs.; diameter 
of bullet = ‘435 in. 
