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).
Design decisions for rubber engine mountings, aero engine R, reduction gear noise, and material treatments.
| Identifier | ExFiles\Box 13\3\ 03-page159 | |
| Date | 18th December 1929 guessed | |
| -2- completed the design for the rubber engine mounting. No decision was come to as regards any further modification to the 20 HP. Whilst discussing the aero engine R.{Sir Henry Royce} agreed that Rg.{Mr Rowledge} should go ahead with the design for automatic boost control following the lines of the one we have rigged up experimentally. The question of automatic control of ignition was also agreed to for a certain engines. The scheme Rg.{Mr Rowledge} had put forward for draining the volute on the supercharger engines was also agreed to. The question of noise in the reduction gear was discussed and R.{Sir Henry Royce} has agreed that the design is to be made on which the pinion is carried solid on the crankshaft and not driven by a serrated driving shaft as at present. This will necessitate major alterations. In the meantime we should not produce any more engines unless the serrated driving shaft is hardened. Special arrangements will have to be made so that the parts can be lapped together after hardening to get rid of the distortion. Chromium plating was discussed. The blemishes on 18-EX were shewn to R and he was of the opinion we should still carry on experiments with Staybright. He/R.{Sir Henry Royce} | ||