Page:EB1911 - Volume 20.djvu/241

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HISTORY AND CONSTRUCTION]
ORDNANCE
   213
Table XVIII.—Sir W. G. Armstrong, Whitworth & Co.’s Guns. Abridged Table.
Official Designation
of Gun.		 Calibre. Weight of
Gun.		 Weight of
Charge.		 Weight of
Projectile.		 Muzzle
Velocity.		 Muzzle
Energy.		 Perforation
of Wrought
Iron.		 Rate Of
firing
Rounds.		 Propellant.
In. Tons. ℔. ℔. Ft.-Secs. Ft.-Tons. In. Per Minute.
12 in. 12 69 318 850 2960 51,640 51·5  2
10 ,, 10 36 200 500 3000 33,318 44·0  3
 9·2 ,, 9·2 28 138 380 3030 24,190 40·8  4
 8 ,, 8 21 90 250 3000 15,600 34·9  5
 7·5 ,, 7·5 15·75 76 200 3000 12,481 32·1  6
 6 ,, 6 8·75 35·5 100 3050 6,492 26·0  9
 4·7 ,, 4·7 3·3 15 45 3000 2,808 19·1 12
 4 ,, 4 2·1 11 31 3000 1,934 17·3 12
 3 ,, 3 1·1 5·75 14·3 3050 922 13·9 30 Semi-
automatic
 6 pr. 2·24 ·52 13 2400 240  7·3 25
 3 ,, 1·85 ·25 ·625 3·3 2300 121  5·7 25

Note.-The most powerful gun of each calibre has been selected.

Table XIX.—Vickers, Sons and Maxim's Guns. Abridged Table.
Official Designation
of Gun.		 Calibre. Weight of
Gun.		 Weight of
Charge.		 Weight of
Projectile.		 Muzzle
Velocity.		 Muzzle
Energy.		 Perforation
of Wrought
Iron.		 Rate Of
firing
Rounds.		 Propellant.
In. Tons. ℔. ℔. Ft.-Secs. Ft.-Tons. In. Per Minute.
12 in. 12 66·85 344 850 3010 53,400 53·0  2
10 ,, 10 5 850 2800 46,195 47·43  3
9·2 ,, 9·2 27·8 184 380 3070 24,835 41·3  4
8 ,, 8 14·15 90 216·7 3090 14,350 33·9  6
7·5 ,, 7·5 16·0 80·3 200 3007 12,540 32·3  8
6 ,, 6 7·8 43 100 3190 7,056 27·9 10
4·7 ,, 4·72 3·1 17 45·14 3050 2,910 18·5 12
4 ,, 4 2·1 11·25 31 3030 1,975 17·6 15
3 3 0·95 3·625 12·5 2700 632 10·8 25 Semi-
automatic
6 pr. 2·24 ·52 13 2400 240  7·3 28
3 ,, 1·85 ·28 1·066 3·3 2800 179·4  7·5 30


Table XX.—Krupp’s Naval and Coast-Defence Ordnance. Abridged from Table of Ordnance, 1906.
Official Designation
of Gun.		 Calibre. Weight of
Gun.		 Weight of
Charge.		 Weight of
Projectile.		 Muzzle
Velocity.		 Muzzle
Energy.		 Perforation
of Wrought
Iron.		 Rate of
firing
Rounds.		 Propellant.
In. Tons. ℔. ℔. Ft.-Secs. Ft.-Tons. In. Per Minute.
30·5 cm. 12·01 47
52·2		 357 771·6
981·0		 3251
2884		 56,540 ..
53·0		  2–3
28 ,, 11·02 36·4
40·4		 2767 595·2
760·6		 3255
2881		 43,754 52·0
49·0		  2–3 The explosive
for the
24 ,, 9·45 22·93
25·45		 173·6 374·8
474·0		 3255
2894		 27,540 44·5
42·0		  3–4 charges of
guns of 105
cm. and up-
21 ,, 8·27 15·20
16·90		 115·2 249·1
308·6		 3251
2920		 18,101 38·6
36·5		  4–5 wards con-
19 ,, 7·48 11·37
12·64		 86·2 187·4
235·9		 3241
2890		 13,572 35·0
33·1		  5–6 tains 25% of
nitroglycerin
17 ,, 6·7 8·55
9·48		 64·6 141·1
176·4		 3238
2897		 10,259 32·0
30·3		  6–7
15·5 ,, 5·91 5·5
6·2		 41·7  90·4
112·4		 3245
2910		 6,603 27·4
26·1		  6–8
12 ,, 4·72 2·86
3·18		 21·72  46·3
 59·5		 3274
2887		 3,442 22·2
20·8		 15–20
10·5 ,, 4·13 1·92
2·13		 14·55  30·9
 39·7		 3281
2897		 2,306 19·5
18·3		 20–25
9   ,, 3·54 1·28 7·72  19·84
 25·13		 3162
2812		 1,377 16·0
15·0
1·45 7·94  19·84
 25·13		 3248
2887		 1,452 16·5
15·6		 25–30 The explosive
for charges
7·5 ,, 2·95 ·74 4·48  11·46
 14·55		 3165
2812		 797 13·3
12·6		 of guns up
to 9·5 cm.
·84 4·61  11·46
 14·55		 3251
2887		 840 13·9
13·0		 30–40 contains 40%
nitroglycerin
5·7 ,, 2·24 ·325 1·96 5·07
6·4		 3156
2808		 350 10·1
 9·5
·367 2·03 5·07
6·4		 3242
2884		 369 10·5
 9·9		 40–50
5·0 ,, 1·97 ·220 1·32 3·42
4·3		 3242
2890		 249  8·7
 8·4
·248 1·37 3·42
4·3		 3242
2890		 249  9·0
 8·75		 40–50

Note.—The most powerful gun of each calibre has been selected.

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