[John McGillivray]

With respect to performance, the British 3.7in gun appears to be closer to the German 105mm Flak 38 gun than the 88mm Flak 36

3.7in Mk.II L / 50
Weight – travel- 9401kg (20725lbs)
Weight – firing- 9326kg (20541lbs)
Weight of HE shell – 12.96kg (28.56 lbs)
Muzzle Velocity- 793m/s (2600ft/s)
Maximum range (horizontal) - 18800m (20660yards)
Maximum range (vertical) - 12000m (39370ft)
Effective ceiling – 9760m (32000ft)
Penetration Data: AP Mk II
Weight 12.6 kg – MV 793m/s (range – penetration RHA/FHA @30deg)
100m – 131/116mm, 500m – 124/110mm, 1000m – 116/103mm, 1500m – 108/96mm, 2000m – 100/89mm.


105mm Flak 38
Weight – travel- 12700kg (28000lbs)
Weight – firing- 10224kg (22533lbs)
Weight of HE shell – 14.8kg (32.6lbs)
Muzzle Velocity- 881m/s (2890ft/s)
Maximum range (horizontal) -17380m (191000yards)
Maximum range (vertical) - 11400m (37401ft)
Effective ceiling – 9450m (31000ft)
No penetration data

88mm Flak 36
Weight – travel- ?kg (?lbs)
Weight – firing- 4983kg (10983lbs)
Weight of HE shell – 9.4kg ( 20.7lbs)
Muzzle Velocity- 820m/s (2690ft/s)
Maximum range (horizontal) - 14815m (16270yards)
Maximum range (vertical) - 9900m (32480ft)
Effective ceiling – 8000m (26246ft)
Penetration Data: PzGr. ( Armour Piercing Capped Ballistic Cap)
Weight 9.65kg – MV 810m/s (range – penetration RHA @30deg)
100m – 97mm, 500m – 93mm, 1000m – 87mm, 1500m – 80mm, 2000m – 72mm.