Maxim-Nordenfelt 57mm gun
|
Bulgarian designation : |
57mm
Максим Норденфелд оръдие |
|
|
Nordenfelt designation : |
6
–pr. Q.F. Caponnière Gun |
|
|
Calibre : |
57mm
L/48 |
|
|
Weight of the barrel : |
195,6 kg |
|
|
Weight of the breech-block : |
19,6 kg |
|
|
Weight of the carriage : |
820 kg |
|
|
Weight of the field carriage : |
584 kg |
|
|
Barrel length : |
1.503 m |
|
|
Length of the bore : |
1.320 m |
|
|
Rifling |
length : |
1.070 m |
|
twist : |
decreasing,
from 1 in 45 to 1 in 30 calibres |
|
|
Barrel
grooves |
number : |
24 |
|
depth : |
0.3048 mm |
|
|
width : |
1.88 mm |
|
|
Cartridge |
length : |
224 mm |
|
weight : |
684 g |
|
|
battering charge : |
552 567 g of
RLG² coarse-grained powder |
|
|
weight shelled : |
3.9 kg |
|
|
Cast iron shell |
length : |
210 mm |
|
weight : |
2.721 kg –
charge : 75 g of gunpowder |
|
|
Ring shell |
length : |
218 mm |
|
weight : |
2.721 kg –
charge : 85 g of gunpowder |
|
|
Shrapnel |
length : |
208 mm |
|
weight : |
2.721 kg –
charge : 30 g of gunpowder 70 bullets x
15 g |
|
|
fuze : |
8’ time and
percussion graduated up to 2500 m |
|
|
Case shot |
length : |
3.712 kg – 196
bullets x 11 g / 17 g |
|
battering charge : |
312 g of
RLG² coarse-grained powder |
|
|
Muzzle velocity : |
440 m/s |
|
|
Max. range : |
2500 m |
|
|
Elevation : |
+ 10° / - 2° |
|
|
Remarks : Light QF
fortress gun. For service in caponnière
the gun was mounted on a non-recoil carriage and elastic stand, that was fitted with small trucks, so that the gun could
be removed easily from a position to another and readily fixed in its firing
emplacement. In order to obtain greater mobility, it could
be mounted on a light non-recoil field carriage. |
||
|
|
|
