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).
Specifications for front brake drums, aiming for a common interchangeable design.
| Identifier | ExFiles\Box 148\5\ scan0301 | |
| Date | 7th September 1938 | |
| -3- RM{William Robotham - Chief Engineer}/APM.3/WH.7.9.38. Front. 12" dia. drums, either aluminium or iron, identical with the rear. Aluminium shoes or steel shoes. 0.750" travel wedge or hydraulic cylinder. It should be realised that we are now aiming at drums that are interchangeable between B.III and B.30 in dimensions, if not in material, and, therefore, do not wish to build any more B.III than we can help with 12" dia. drums. Hence the urgency for a common scheme. RM{William Robotham - Chief Engineer}/APM. | ||