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 fitting of a Graham supercharger to a Bentley engine for road demonstration.
| Identifier | ExFiles\Box 140\1\ scan0133 | |
| Date | 14th February 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} c. to Hs{Lord Ernest Hives - Chair}/Smth. 4209 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/KW.14.2.35. Supercharging the Bentley on the Road. Will you please arrange to fit the Graham Supercharger to the crankcase at present going through with the reduced dynamo speed. The reduced dynamo speed, together with the ratio of the gears which we are getting from America, will give us the correct supercharger speed. When this engine is built up we should like it to be fitted with a narrow pin crankshaft if one of these is available; also a flywheel and clutch as fitted to 21-G-IV. If one of these flywheels and clutches is not available we will use the standard flywheel and clutch. We want to get this engine through as soon as we can, because we have now got sufficient information to demonstrate the supercharger on the road, and the gears should arrive from America by the end of the month. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||