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).
Engine distribution, gear rattles, airscrew vibration, and combustion space design.
| Identifier | ExFiles\Box 33\2\ Scan133 | |
| Date | 7th November 1929 | |
| RgS/LW.7.11.29 - 2 - that should also apply to the F.{Mr Friese} engine at our earliest convenience. The question of the distribution on the super-charged engines, particularly the moderate type, was discussed, and it was agreed to go ahead with the application of more heat, both on the volute elbow as now instructed, but also on the long pipe in the Vee. It was also decided that we should build up some pipes of various types to try to obtain better cold distribution to reduce the amount of heat necessary. This, it was thought, would mainly consist of raising the pipe in the Vee together with some method of bringing up the slow running mixture or part of the slow running mixture through a small pipe into the centre of the engine, instead of by the large main volute. The question of distribution was also discussed in connection with gear rattles in the engines running on the ground. It was thought that if the engines running were firing evenly the gear rattles would not be too bad. It was also discussed in connection with carburetters in the Vee that it was thought quite a small pipe joining all the four pipes together that would be effective for slow running, would be beneficial. Airscrew gear vibration was discussed, and besides the question of carburation mentioned above, it was thought that a three-bladed propeller might be an advantage. We are taking the question up with Metal Propellers, Ltd., and the Air Ministry to see whether we can arrange for the development of the three-bladed airscrew. The desirability of some work to produce an anti-detonating combustion space was discussed, and it was agreed that it would be useful to make a test with the spark plugs both on the exhaust side of the engine. Rg.{Mr Rowledge} | ||