Epicyclic gearing, comparing transmission slack and noise in Lanchester and Armstrong Siddeley cars.
| Identifier | ExFiles\Box 104\4\ scan0180 | |
| Date | 3rd February 1933 | |
| X 5640 To Hdy. {William Hardy} From Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} 4/MJ.3.2.33. 7660 EPICYCLIC GEARING. Hdy. {William Hardy} 1/M28.1.33. In order to find the amount of slack in the transmission caused by the Wilson gearbox we tried both our Lanchester car and also an Armstrong Siddeley '15'. In the former fitted with a fluid flywheel there is no 'chunking' in the drive whatever. On the Armstrong there was a small amount of slack in top gear and more in third and second speeds. The chunking on this car was however considerably less than we have had on any Peregrine(Experimental Bentley car never produced / Aero Engine) chassis, and was not objectionable. Their demonstrator attributed some of the noise to the peculiar gearbox suspension in which the rear axle torque is resisted by a ball on an off-set arm at the front of the gearbox, movement of the ball causing some noise. Hs {Lord Ernest Hives - Chair} /H.Grylls. | ||
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).