Ordnance, RCL, 3.45 in
| Ordnance, RCL, 3.45 in Mk 1 | |
|---|---|
| Type | Recoilless rifle |
| Place of origin | UK |
| Service history | |
| Used by | UK |
| Specifications | |
| Mass | 75 lb |
| Barrel length | 68.55 in (14.75 calibres) |
| Caliber | 3.45 inches |
| Carriage | none |
| Muzzle velocity | 600 ft / second |
| Effective firing range | 1,000 yards |
The 3.45 inch RCL was a British recoilless weapon, designed by Sir Dennis Burney during the Second World War. Delayed by problems due to wear upon firing, it did not see action, as was hoped, in the Far East. However it did lead to the post war Mobat and Wombat recoiless rifles.
History
The 3.45 inch RCL was built by the Broadway Trust Company, a company formed by Sir Dennis himself. Sir Dennis was privy to the design of the 20mm m/42, a recoilless rifle designed by the Swedish Carl Gustav company during World War 2, but it had little bearing on his work as the Carl Gustav was a large bore rifle design intended to remove the recoil experienced with anti-tank rifles such as the Boys ATR or similar large calibre bolt-action rifles which required large cartridges to deliver high velocity rounds. The usefulness of anti-tank rifles was lost as tanks were built with much thicker armour during the war. Although Burney's designs did not have high muzzle velocities, this was negated by the shell being used which used explosive instead of speed and weight to defeat the armour.
Design
This was a weapon that could be fired from the shoulder, giving unrestricted traverse or elevation within the limits of the human frame, or mounted on a simple tripod. A portion of the propelling charge bled through holes in the cartridge wall and into a space around the breech and then backwards through four venturis. This counter blast backwards cancelled out the recoil.
Specification
Ordnance, RCL, 3.45in Mk 1
- Weight: 75lb
- Length: 68.55in
- Barrel: 14.75 calibres
- Muzzle velocity: 600 ft / second
- Range: 1,000 yards
- Ammunition: Cartridge RCL, 3.45 inch WB ("Wallbuster")
- Type: HESH
- Propellant: 11 lb 2 oz cordite
- Filling : plastic explosive
- Weight: 16 lb 4 oz
Suggested reading
- British & American Artillery of World War Two, by Ian V. Hogg