From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The problems and limitations of installing various guns in aircraft turrets.
| Identifier | ExFiles\Box 176\1\ img082 | |
| Date | 20th September 1940 | |
| - 3 - Cont'd.{John DeLooze - Company Secretary} HALF INCH GUN. They emphasize that the problems on turrets of feed and disposal of links and ejection were becoming increasingly difficult because the Air Ministry were calling for increased quantities of ammunition to be carried in the turret and also, that the gunner should operate the wireless, the controls for which therefore, had to be brought into the turret. They have promised to let us have a list of some of the limitations. They are in agreement with Fraser Nash that they cannot get more than two half inch guns in place of four .303"s. Three guns seems a hopeless proposal in any turret. We asked them to look into the question of two .303"s and two ½" as a possible alternative. The shape of the Rolls Royce ½" gun seems to suit them but, as it will probably be necessary to modify its shape to facilitate wing installations, they cannot start fitting the gun into one of their turrets at the present moment. TM. | ||