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GBR - Hispano Mk.II (20 mm kanón)

GBR - Hispano Mk II

Hispano Mk.II
Original title:
Original Name:
Hispano MK II
Martin-Baker Aircraft Co. Ltd., British Manufacture & Research Co.
Period of production:
Production Period:
Made pieces:
Number of Produced:
a Prototype made:
Prototype Built:
Use: Use: Blackburn Firebrand
Blackburn Firecrest
Bristol Beaufighter
CAC Boomerang
Consolidated Liberator Mk.I (he's 20 aircraft)
De Havilland Mosquito
Douglas Boston Mk.III
Fairey Firefly
Gloster Meteor
Hawker Hurricane Mk.IIC and Mk.IV
Hawker Tempest Mk.In Srs Even
Hawker Typhoon Mk.IB, FR.IB and NF.IB
, The Martin-Baker MB 3—prototype
, the North American Mustang IA
Supermarine Spitfire the Mk In the Mk XX.
Technical data:
Technical Data:
50 kg
20 mm (0.79 in)
barrel Length:
Barrel Length:
1600 mm
Overall length:
Overall Length:
2360 mm
Used ammunition:
Ammo Used:
Ap (steel-core) and armour piercing with tracer (168 g), incendiary, twitchy and twitchy lighter (130 g)
Maximum range:
Maximum Range:
1 km
Rate of fire:
Rate of Fire:
600 - 700 rounds/min
Muzzle velocity:
Muzzle Velocity:
850 - 880 m/s
See the history.
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British Hispano Mk.II

This weapon was developed in the Uk on the basis of the licensed production of the cannon Hispano-Suiza HS-404. Gun first produced in Great Britain in version of the Hispano Mk.Also, the ammunition supply was carried in the drum tray and was fitted e.g. to the heavy fighters Westland Whirlwind Mk.I, Beafighterů and tentatively also to the of the Spitfire Mk.Ib. The disadvantage of this weapon was limited supply of ammunition, and also the dimension of the drum tray, one has already accounted for problems when mounting the weapons to the wings of an airplane. For the purpose of the gun was rotated 90° and the tray actually lay beside the guns, however, this created problems with reliability. The first Spitfires were soon withdrawn from the battle, the solution was the use of ammunition belt, they tried that already the French, but this adjustment failed to realize. Drawing documentation, however, was passed in 1940, the British and engineers fy Martin-Baker managed to this charging method successfully solved and this adjustment led to a usable state and introduced into production the cannon, which was marked as the Hispano Mk.II.

To reduce the height of the gun, this will facilitate development to the wings, substantially increased ammunition supply and also the reliability of the weapon was considerably higher, but still that wasn't it. The barrel had a short recoil and often causing it to jam the cannon. Shooting one cannon (Spitfire) caused a significant yaw of the aircraft. Gunsmiths found that each weapon behaves quite differently, and for every cannon in his adjustment to access differently, then the situation has improved. The effectiveness of this cannon was good, compared to the German cannon MG-FF, or the Russian cannon ŠVAK was doubled. A further development arises Hispano Mk.In.

Used sources:
Peter R. Caygil, Spitfire MK I - V (Combat Legends) The Crowood Press, April 9, 2005, ISBN 1-84037-391-1
archives of the author.
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