384 MESSRS. R, H. FOWLER, E. G. GALLOP, C. N. H. LOCK AND H. W. RICHMOND : 
Table Till.—Plane Trajectories at 50 degrees and 30 degrees, with Calculations 
of the Drift, &c., for Shells of External Form A. 
Constants used in the Calculations. 
Muzzle velocity 
Centre of gravity . 
Weight .... 
Moments of inertia 
^ _ f gun rifled 1 in 30 
l „ 1 „ 40 
Ballistic coefficient. 
2000 feet per second. 
4*88 inches from the base. 
16-02 lb. 
0-1329 lb. (ft.) 2 . 
1-1555 lb. (ft,.) 2 . 
192-7 radians per second. 
144-5 
1-75. 
Table YIIIa. —Plane Trajectories at Elevations of 50 degrees and 30 degrees. 
Column 1. Time t, seconds. 
,, 2. Velocity v u feet per second. 
,, 3. Inclination degrees. 
,, 4. Horizontal distance X, feet. 
,, 5. Vertical height Y, feet. 
Elevation 50 degrees. 
Elevation 30 degrees 
1. 
2. 
3. 
4. 
5. 
2. 
3. 
4. 
5. 
0 
2000 
50 0 
0 
0 
2000 
O / 
30 0 
0 
0 
1 
1720 
49 21 
1,199 
1,413 
1726 
29 8 
1,614 
917 
2 
1506 
48 36 
2,254 
2,628 
1515 
28 8 
3,033 
1692 
3 
1342 
47 44 
3,201 
3,686 
1352 
26 59 
4,300 
2354 
4 
1218 
46 45 
4,068 
4,624 
1230 
25 42 
5,454 
2926 
6 
1059 
44 28 
5,648 
6,241 
1075 
22 45 
7,538 
3867 
8 
959 
41 48 
7,116 
7,619 
985 
19 24 
9,455 
4608 
10 
877 
38 43 
8,514 
8,805 
916 
15 42 
11,264 
5182 
! 12 
807 
35 13 
9,857 
9,819 
860 
11 40 
12,988 
5603 
14 
746 
31 15 
11,155 
10,671 
816 
7 19 
14,639 
5881 
16 
693 
26 45 
12,411 
11,369 
780 
2 43 
16,227 
6021 
18 
647 
21 44 
13,631 
11,921 
751 
2 7 
17,755 
6030 
20 
609 
16 10 
14,817 
12,330 
728 
- 7 5 
19,228 
5912 
24 
557 
3 40 
17,098 
12,738 
703 
-17 11 
22,017 
5314 
28 
537 
9 50 
19,266 
12,624 
700 
- 26 55 
24,608 
4261 
32 
547 
- 22 55 
21,331 
12,013 
712 
- 35 51 
27,011 
2790 
36 
579 
-34 25 
23,293 
10,930 
735 
- 43 40 
29,228 
938 
40 
627 
-43 54 
25,151 
9,403 
44 
681 
-51 30 
26,902 
7,466 
48 
735 
-57 32 
28,539 
5,157 
52 
786 
- 62 23 
30,057 
2,521 
55 
818 
- 65 25 
31,114 
359 
