NEW AUSTRIAN 6-IN. BRONZE-STEEL GUN. 
417 
Tlie Artillery Committee then proposed to adopt this long 15 cln 
ringed cast-iron gun for both garrison and siege service; but it was 
considered necessary to obtain not only sufficient accuracy of fire up 
to a range of (7500 m ) 8202 yds., but also to pierce tolerably thick 
plates at a distance of (900 m ) 984 yds., and lastly to diminish the 
weight of the gun considerably. 
Between March and September, 1874, experiments were carried on 
with a steel (15 cm ) 6 -in. Krupp ringed gun, which was identical with 
that which had given such good experimental results in Prussia in 
1873. (Vide table below). 
Note. —Throughout this paper the figures in brackets represent the metrical measures and 
No. of 
Eleva¬ 
Mean time 
Mean range. 
Mean error in 
rounds. 
tion. 
of flight. 
Range. 
Direction. 
O 
secs. 
metres or yds. 
metres or yds. 
metres or yds. 
10 
40 
43-3 
( (8813) 
l 9638 
(70) 
76-5 
(13*2) 
14'4 
20 
33 
37*3 
5 (8465) 
i 9257 
(42) 
45*9 
(17*5) 
19*1 
24 
23-6 
28’2 
? (7434) 
l 8130 
(53) 
57-9 
(7*7) 
8-4 
18 
16-2 
20’3 
5 (5578) 
l 6100 
(27) 
29*5 
(5*6) 
6-1 
15 
10*4 
13*8 
C (4199) 
l 4593 
(24) 
26-2 
(3*6) 
3-9 
15 
6-5 
10-0 
f (3214) 
l 3515 
(9) 
9-8 
(2-3) 
2*5 
The principal data as to this ringed gun are as below, viz.:— 
Weight 
of gun. 
Total 
length. 
Grooves. 
Charge. 
0^ 
.approximate 
length of bore. 
No. 
Depth of 
Width of 
Twist. 
rH O 
0 
£ & 
M.V. 
cwt. 
ins. 
ins. 
cals. 
in. 
in. 
lbs. 
lbs. 
f.s. 
58*6 
141-6 
102 
19 
36 
0-06 
0-37 
U.l in 54 
13-64 
61-6 
1592 
A single cylindro-prismatic breech-block with Broadwell ring was 
used with it. 
Three different natures of projectiles were tried :—■ 
(1) . Common shells with rings of copper or an envelope of zinc 
and tin. 
(2) Battering projectiles of steel and of chilled iron with rings of 
zinc. 
(3) Similar projectiles with rings of brass. 
At (500 m ) 547 yds. the battering projectiles pierced an iron plate 
( 15 mm) 5.9 i ns> an( j inclined at an angle of 14|°. 
Experiments for range and accuracy at (1500 m ) 1640 and (2000 m ) 
2187 yds. gave bad results, apparently due to the mode of rotation, 
and accordingly, in September, 1874, further practice was carried out 
54 
