Page:EB1911 - Volume 20.djvu/241

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	${\Big \{}$Semi-  automatic
6 pr.	2·24	·52		1·13	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	27·85	172	496·6	2863	28,225	41·0	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	${\Big \{}$Semi-  automatic
6 pr.	2·24	0·46	1·55	6	2600	281	8·2	28
3 ,,	1·85	·28	1·066	3·3	2800	179·4	7·5	30

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

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	276	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 above table includes a light and heavy type of gun, but for each the length of bore is 50 calibres; in the unabridged table guns of 40 and 45 calibres are included. The particulars of the shorter pieces can be easily obtained from Table XX., as the