WesWorld

Existing guns as of 1 July 1924.

Starting from the bottom up.

-----

13.7mm, 75 caliber
Modified Italian design

Caliber = 0.54 inch (1.37 cm)
Shell weight = 0.28 lbs (0.125 kg)
Muzzle velocity = 1994 fps (608 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 0.023 megajoules = 8.655 foot-tons

Relative muzzle energy: 1.72

Barrel length: 75 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 2400 yards 4.9 sec 1130 fps 3.7 deg
5.0 deg 3700 yards 8.9 sec 843 fps 8.8 deg
7.5 deg 4600 yards 12.5 sec 698 fps 14.9 deg
10.0 deg 5200 yards 15.7 sec 617 fps 21.1 deg
12.5 deg 5700 yards 18.7 sec 569 fps 27.5 deg
15.0 deg 6200 yards 21.5 sec 541 fps 33.5 deg
20.0 deg 6800 yards 26.7 sec 520 fps 44.3 deg
25.0 deg 7200 yards 31.4 sec 523 fps 52.8 deg
30.0 deg 7500 yards 35.8 sec 535 fps 59.5 deg
35.0 deg 7600 yards 40.0 sec 551 fps 64.9 deg
40.0 deg 7600 yards 43.8 sec 566 fps 68.9 deg
45.0 deg 7400 yards 47.5 sec 582 fps 72.4 deg
50.0 deg 7100 yards 50.8 sec 595 fps 75.1 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 1.58 inches


Elevation Range Belt Deck



Maximum range = 7600 yards at 36.6 deg elevation

Maximum altitude = 16600 feet at 90 deg elevation

25mm/60

Caliber = 0.98 inch (2.5 cm)
Shell weight = 0.48 lbs (0.22 kg)
Muzzle velocity = 3210 fps (979 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 0.104 megajoules = 38.423 foot-tons

Relative muzzle energy: 1.28

Barrel length: 60 calibers


Elevation Range Time Velocity Fall Angle
2.5 deg 3000 yards 6.1 sec 809 fps 6.1 deg
5.0 deg 3900 yards 10.1 sec 559 fps 14.6 deg
7.5 deg 4400 yards 13.4 sec 463 fps 23.6 deg
10.0 deg 4800 yards 16.4 sec 418 fps 32.6 deg
12.5 deg 5100 yards 19.1 sec 398 fps 40.5 deg
15.0 deg 5300 yards 21.6 sec 392 fps 47.3 deg
20.0 deg 5600 yards 26.2 sec 396 fps 57.9 deg
25.0 deg 5800 yards 30.4 sec 408 fps 65.3 deg
30.0 deg 5800 yards 34.4 sec 421 fps 70.8 deg
35.0 deg 5800 yards 38.1 sec 433 fps 74.7 deg
40.0 deg 5700 yards 41.6 sec 443 fps 77.7 deg
45.0 deg 5500 yards 45.0 sec 451 fps 80.0 deg
50.0 deg 5300 yards 48.1 sec 457 fps 81.9 deg


Armor Penetration - Vertical Belt Armor
(Relative armor quality, 1.00)
Maximum penetration: 2.35 inches

Maximum range = 5900 yards at 31.4 deg elevation

Maximum altitude = 14100 feet at 90 deg elevation

40mm/56


Caliber = 1.57 inch (4.0 cm)
Shell weight = 2 lbs (1 kg)
Muzzle velocity = 3045 fps (928 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 0.391 megajoules = 144.1 foot-tons

Relative muzzle energy: 1.16

Barrel length: 56 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 3700 yards 6.5 sec 1073 fps 5.0 deg
5.0 deg 5100 yards 11.2 sec 747 fps 12.2 deg
7.5 deg 5900 yards 15.1 sec 615 fps 20.1 deg
10.0 deg 6600 yards 18.6 sec 549 fps 27.9 deg
12.5 deg 7000 yards 21.9 sec 515 fps 35.6 deg
15.0 deg 7400 yards 24.9 sec 500 fps 42.3 deg
20.0 deg 8000 yards 30.4 sec 498 fps 53.0 deg
25.0 deg 8300 yards 35.5 sec 510 fps 60.9 deg
30.0 deg 8500 yards 40.3 sec 527 fps 66.8 deg
35.0 deg 8600 yards 44.8 sec 543 fps 71.2 deg
40.0 deg 8500 yards 49.1 sec 558 fps 74.6 deg
45.0 deg 8300 yards 53.1 sec 571 fps 77.2 deg
50.0 deg 8000 yards 56.9 sec 581 fps 79.4 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 3.54 inches


Elevation Range Belt Deck



Maximum range = 8600 yards at 34.7 deg elevation

Maximum altitude = 19900 feet at 80.0 deg elevation

Arsenal de Manila 57mm/45


Caliber = 2.24 inch (5.7 cm)
Shell weight = 6 lbs (3 kg)
Muzzle velocity = 2590 fps (790 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 0.849 megajoules = 312.7 foot-tons

Relative muzzle energy: 0.87

Barrel length: 45 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 3600 yards 6.1 sec 1300 fps 4.0 deg
5.0 deg 5400 yards 11.0 sec 941 fps 9.7 deg
7.5 deg 6600 yards 15.3 sec 774 fps 16.3 deg
10.0 deg 7500 yards 19.1 sec 686 fps 23.0 deg
12.5 deg 8100 yards 22.6 sec 636 fps 29.6 deg
15.0 deg 8700 yards 25.9 sec 609 fps 35.8 deg
20.0 deg 9500 yards 32.0 sec 592 fps 46.5 deg
25.0 deg 10100 yards 37.7 sec 600 fps 55.0 deg
30.0 deg 10500 yards 43.0 sec 617 fps 61.4 deg
35.0 deg 10700 yards 48.0 sec 636 fps 66.4 deg
40.0 deg 10700 yards 52.7 sec 656 fps 70.3 deg
45.0 deg 10500 yards 57.1 sec 673 fps 73.4 deg
50.0 deg 10100 yards 61.2 sec 689 fps 75.9 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 4.16 inches


Elevation Range Belt Deck

1.7 deg 2900 yards 2 in


Maximum range = 10700 yards at 37.5 deg elevation

Maximum altitude = 22800 feet at 75 deg elevation

Arsenal de Manila 100mm/52 Mk.1923


Caliber = 3.94 inch (10.0 cm)
Shell weight = 32 lbs (15 kg)
Muzzle velocity = 2881 fps (878 m/s)

Relative ballistic performance: 0.95

Muzzle energy = 5.599 megajoules = 2063.3 foot-tons

Relative muzzle energy: 1.05

Barrel length: 52 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 5100 yards 7.1 sec 1691 fps 3.6 deg
5.0 deg 8000 yards 13.0 sec 1274 fps 8.6 deg
7.5 deg 10000 yards 18.3 sec 1062 fps 14.3 deg
10.0 deg 11500 yards 23.1 sec 943 fps 20.4 deg
12.5 deg 12800 yards 27.6 sec 872 fps 26.4 deg
15.0 deg 13800 yards 31.8 sec 832 fps 32.2 deg
20.0 deg 15500 yards 39.7 sec 802 fps 42.4 deg
25.0 deg 16700 yards 47.0 sec 808 fps 50.5 deg
30.0 deg 17600 yards 53.9 sec 829 fps 57.0 deg
35.0 deg 18200 yards 60.5 sec 856 fps 62.1 deg
40.0 deg 18500 yards 66.8 sec 885 fps 66.2 deg
45.0 deg 18500 yards 72.7 sec 913 fps 69.5 deg
50.0 deg 18100 yards 78.2 sec 938 fps 72.3 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 8.32 inches


Elevation Range Belt Deck

2.6 deg 5300 yards 4 in
8.1 deg 10400 yards 2 in
22.8 deg 16200 yards ... 1 in


Maximum range = 18500 yards at 42.0 deg elevation

Maximum altitude = 38200 feet at 75 deg elevation

In addition, the following foreign-pattern guns are currently in use as of 1 July 1924:

(EDITED to correct caliber of US 6" and 8"...)

57mm/?? Italian - CL Cíudad Rodrigo
88mm/45 German (Austrian) - BB Fernando
100mm/50 Austrian - BB Fernando
3"/50 American - Manila-class CAs, R-class TBs
3"/12-pdr British - Manila-class BBs
3"/45 Italian - Indomido-class DDs
4"/40 American - various ships
6"/45 British - Manila-class BBs
6"/45 Italian - CL Cíudad Rodrigo
6"/50 American - Manila-class CAs, Palawan-class CLs
8"/45 American - Manila-class CAs
9.4"/45 Austrian - BB Fernando
12"/40 British - Manila-class BBs
12"/45 Austrian - BB Fernando

These guns were to be installed on Basilan; now, they'll go to coastal batteries.

Skoda 254/45


Caliber = 10.0 inch (25.4 cm)
Shell weight = 525 lbs (238 kg)
Muzzle velocity = 2611 fps (796 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 75.497 megajoules = 27820.7 foot-tons

Relative muzzle energy: 0.87

Barrel length: 45 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 5300 yards 6.9 sec 2079 fps 3.0 deg
5.0 deg 9300 yards 13.2 sec 1763 fps 6.6 deg
7.5 deg 12500 yards 19.1 sec 1557 fps 10.6 deg
10.0 deg 15200 yards 24.7 sec 1418 fps 14.9 deg
12.5 deg 17500 yards 30.0 sec 1324 fps 19.4 deg
15.0 deg 19500 yards 35.2 sec 1260 fps 24.0 deg
20.0 deg 22800 yards 44.9 sec 1196 fps 32.5 deg
25.0 deg 25500 yards 54.0 sec 1183 fps 39.9 deg
30.0 deg 27700 yards 62.7 sec 1198 fps 46.4 deg
35.0 deg 29300 yards 71.0 sec 1229 fps 51.8 deg
40.0 deg 30300 yards 78.8 sec 1267 fps 56.3 deg
45.0 deg 30700 yards 86.2 sec 1308 fps 60.3 deg
50.0 deg 30400 yards 93.1 sec 1348 fps 63.8 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 18.57 inches


Elevation Range Belt Deck

1.1 deg 2600 yards 16 in
2.3 deg 4900 yards 14 in
3.9 deg 7600 yards 12 in
5.8 deg 10400 yards ... 1 in
6.2 deg 10900 yards 10 in
9.7 deg 14900 yards 8 in
13.5 deg 18300 yards ... 2 in
16.0 deg 20200 yards 6 in
21.0 deg 23500 yards ... 3 in
28.1 deg 26900 yards ... 4 in
30.1 deg 27700 yards 4 in
35.6 deg 29400 yards ... 5 in
44.0 deg 30700 yards ... 6 in


Maximum range = 30700 yards at 45.5 deg elevation

Arsenal de Manila 130mm/50 Mk.1925

Caliber = 5.12 inch (13.0 cm)
Shell weight = 70 lbs (32 kg)
Muzzle velocity = 2811 fps (857 m/s)

Relative ballistic performance: 0.95

Muzzle energy = 11.661 megajoules = 4297.1 foot-tons

Relative muzzle energy: 1.00

Barrel length: 50 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 5300 yards 7.1 sec 1838 fps 3.4 deg
5.0 deg 8600 yards 13.2 sec 1431 fps 7.8 deg
7.5 deg 11000 yards 18.7 sec 1210 fps 12.9 deg
10.0 deg 12800 yards 23.9 sec 1076 fps 18.6 deg
12.5 deg 14400 yards 28.6 sec 997 fps 24.0 deg
15.0 deg 15700 yards 33.2 sec 948 fps 29.6 deg
20.0 deg 17800 yards 41.7 sec 908 fps 39.3 deg
25.0 deg 19400 yards 49.6 sec 909 fps 47.4 deg
30.0 deg 20600 yards 57.1 sec 929 fps 53.9 deg
35.0 deg 21500 yards 64.2 sec 959 fps 59.1 deg
40.0 deg 21900 yards 71.0 sec 991 fps 63.3 deg
45.0 deg 22000 yards 77.4 sec 1024 fps 66.8 deg
50.0 deg 21700 yards 83.5 sec 1054 fps 69.9 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 10.44 inches


Elevation Range Belt Deck

2.4 deg 5200 yards 6 in
5.4 deg 9000 yards 4 in
15.4 deg 15800 yards 2 in
15.7 deg 16000 yards ... 1 in
34.4 deg 21400 yards ... 2 in


Maximum range = 22000 yards at 43.5 deg elevation

Maximum altitude = 27200 feet at 50 deg elevation

Arsenal de Manila 155mm/52 Mk.1925

Caliber = 6.1 inch (15.5 cm)
Shell weight = 125 lbs (57 kg)
Muzzle velocity = 2808 fps (856 m/s)

Relative ballistic performance: 0.95

Muzzle energy = 20.779 megajoules = 7657.0 foot-tons

Relative muzzle energy: 1.05

Barrel length: 52 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 5600 yards 7.2 sec 1970 fps 3.2 deg
5.0 deg 9300 yards 13.5 sec 1575 fps 7.3 deg
7.5 deg 12000 yards 19.3 sec 1347 fps 12.1 deg
10.0 deg 14300 yards 24.7 sec 1207 fps 17.2 deg
12.5 deg 16100 yards 29.8 sec 1118 fps 22.5 deg
15.0 deg 17700 yards 34.7 sec 1062 fps 27.7 deg
20.0 deg 20300 yards 43.8 sec 1013 fps 37.0 deg
25.0 deg 22300 yards 52.3 sec 1011 fps 44.9 deg
30.0 deg 23900 yards 60.4 sec 1032 fps 51.4 deg
35.0 deg 25000 yards 68.1 sec 1063 fps 56.7 deg
40.0 deg 25800 yards 75.5 sec 1100 fps 61.0 deg
45.0 deg 26000 yards 82.4 sec 1136 fps 64.6 deg
50.0 deg 25700 yards 88.9 sec 1172 fps 67.8 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 12.88 inches


Elevation Range Belt Deck

1.2 deg 3000 yards 10 in
2.5 deg 5600 yards 8 in
4.8 deg 9000 yards 6 in
9.7 deg 14000 yards 4 in
10.8 deg 14900 yards ... 1 in
24.0 deg 21900 yards ... 2 in
26.4 deg 22800 yards 2 in
38.6 deg 25600 yards ... 3 in


Maximum range = 26000 yards at 44.7 deg elevation

Maximum altitude = 27600 feet at 45 deg elevation

I think it is a bit early for guns of this power. especially that 155mm does stick out ... mine is less powerful and took 2 years and several blown-up guns to develop.

True - and

"13.7mm, 75 caliber
Modified Italian design

Caliber = 0.54 inch (1.37 cm)
Shell weight = 0.28 lbs (0.125 kg)
Muzzle velocity = 1994 fps (608 m/s)

Relative ballistic performance: 0.90

Muzzle energy = 0.023 megajoules = 8.655 foot-tons

Relative muzzle energy: 1.72

Barrel length: 75 calibers "

Isn´t 125g a bit heavy for a 13,7mm shell? This weight reflects only the projectile, not the whole ammo piece!

A ME of 1,72 is truely high,,, One wonders how many shots the barrel will actually survive until it is rendered useless from barrel wear.....?

yep, that is one hell of a magnum for the time. 608 m/s is not that fast, but 230g bullet? have a look at the bullet weights for .50 BMG and 14.5mm Russian ....

In general those shell weights seem a little bit high, though... Am I wrong?

Using BigGun.exe for armour penetration calculations is a bad idea. It isn't just poor, its bad. The penetration displayed is always best case. All penetrations will be less than that figure.

e.g. 155mm gun penetrates 4" plate at 14000yds. A more realistic figure would be at around 10000yds or less with higher target angles.(inclination of hull and from where the ship is firing.)

Facehard.exe from Nathan Okun is a much better program but more complicated.

IIRC I based the 13.7mm shell weight on Warships1 data.

Quoted

took 2 years and several blown-up guns to develop.

Who's to say a few Filipino guns won't go kablooie? Thanks for the story idea.

In that case, I reckon the data above is non-canonical. :-/ I was using either Warships1 shell weights, or the weights BG suggested for 'WWII' rounded up to the nearest 5 lbs.

RA - thanks for the warning on BG. I guess I'll just declare the data above to be 'non-canonical', and start from scratch.