Navies of the world - Edward W. Very

In calibres of a nature above 16-cm. a leather guard is always used in loading, to cover the gas-check and prevent injury from shocks in loading.

A system of guards against firing the gun before the breech-block is entirely closed is attached to the breech or the breech-block. In guns of the model 1864 the guard consists of a small hollow cylinder with funnel-shaped ends, acting as a sort of fairleader for the firing laniard. On the laniard itself are worked three turk’s-heads which, when the laniard is rove through the fairleader and hooked to the primer, come forward of the forward edge. A small spring is attached to the closing-stop of the handle, which projects into the funnel and will not permit the laniard to pass. When the breech is closed, the crank pressing against the closing-stop pushes back the spring and allows a free passage to the laniard. In guns of the model 1870 the guard consists of a small disc which slides over the vent when the breech-block is opened, and remains there so that a primer cannot be inserted until the block is closed and locked.

German Ordnance.

A = Over all.
B = Rifled Bore.
C = Powder Chamber.

Name, Nature, and Classification.		Calibre.	Length.
Name, Nature, and Classification.		Calibre.	A	B	C
		In.	In.	In.	In.
Krupp’s pattern steel Breech-loaders.
30½ cm.	hooped	12	264	172	54.7
28 cm.,	hooped and tubed	11.15	240	171	46.1
28 ”	hooped	10.34	240	171	46.1
26 ”	long hooped	10.24	225	138.5	55.3
26 ”	short ”	10.24	205	128	42.1
24 ”	long ”	9.27	206	136	38.4
24 ”	short ”	9.27	185	115.4	38.4
21 ”	long ”	8.24	185	124.6	33.7
21 ”	short ”	8.24	154	96.8	31.4
17 ”	long ”	6.8	167	107.5	40.8
17 ”	short ”	6.8	134	92.0	24.7
17 ”	short, light hooped	6.8	136	92.7	25.7
15 ”	long hooped	5.87	152	105.8	27
15 ”	short ”	5.87	129	86.8	28.5
15 ”	tubed	5.87	128	86.8	23.5
12 ”	hooped	4.74	115	85.7	14.7
8 ”	heavy	3.19	76	57.6	8.4
8 ”	light	3.19	76	57.6	8.4
8 ”		2.20	62	45.9	7.7
4 ”		1.54	69	54.7	9

D = Number of Grooves.
E = Twist of Rifling.
F = Gun, including Breech-block.
G = Breech-block.

Name, Nature, and Classification.		D	E	Weight.
Name, Nature, and Classification.		D	E	F	G
			Calib.	Lbs.	Lbs.
Krupp’s pattern steel Breech-loaders.
30½ cm.	hooped	72	45	78,980	2,970
28 cm.,	hooped and tubed	36	70	60,500	2,244
28 ”	hooped	36	70	60,500	2,244
26 ”	long hooped	36	50	48,400	1,980
26 ”	short ”	36	50	39,600	1,980
24 ”	long ”	32	70	34,100	1,375
24 ”	short ”	32	65	31,900	1,375
21 ”	long ”	30	68	21,450	858
21 ”	short ”	30	59	19,800	858
17 ”	long ”	30	45	12,320	495
17 ”	short ”	30	59	11,000	484
17 ”	short, light hooped	30	45	7,590	411
15 ”	long hooped	24	45	8,800	319
15 ”	short ”	24	68	7,700	319
15 ”	tubed	24	65	7,040	391
12 ”	hooped	18	60	3,014	178
8 ”	heavy	12	46	714	64
8 ”	light	12	46	650	64
8 ”		12	46	500	55
4 ”		12	70	156	9

A = Preponderance.
B = Carriage.
C = Slide.
D = Height of Axis of Bore above Deck.
E = Chilled.
F = Common.

Name, Nature, and Classification.		A	Carriages.			Projectiles.
			B	C	D	Full Weight.		Bursting Charge.
			B	C	D	E	F	E	F
		Lbs.	Lbs.	Lbs.	In.	Lbs.	Lbs.	Lbs.	Lbs.
Krupp’s pattern steel Breech-loaders.
30½ cm.	hooped		51,040		102	715	609.5	8	22
28 cm.,	hooped and tubed		24,200		102	561	477	7.7	25.3
28 ”	hooped		24,200		102	561	477	7.7	25.3
26 ”	long hooped		16,500	18,075	67	411	367	5.28	17.27
26 ”	short ”		8,849	13,831	48	411	367	5.28	17.27
24 ”	long ”		8,349	13,831	48	308	261	3.19	15.4
24 ”	short ”		5,082	8,756	39	308	261	3.19	15.4
21 ”	long ”		4,290	6,556	40	216	175	2.75	10.45
21 ”	short ”		4,114	6,402	42	216	175	2.75	10.45
17 ”	long ”		2,772	4,576	41	123	112	1.21	9.24
17 ”	short ”		2,321	3,400	33	121	99	1.21	6.6
17 ”	short, light hooped		2,156	2,068	34	117	112	1.32	5.94
15 ”	long hooped	16.5	2,057	3,806	38	78	78	7.7	6.5
15 ”	short ”	48.4	1,947	2,530	34	78	61	7.7	4.4
15 ”	tubed	62.7	1,908	2,640	35	78	61	7.7	4.4
12 ”	hooped	22.2	1,595	2,750	47	38	33		2.48
8 ”	heavy	15.4	1,100		33		9.5		.6
8 ”	light	14.7	880		35		9.5		.6
8 ”		14	246	246	35		6.7		.6
4 ”			Turntable.				125		.28