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).
Potential solutions for vibrations in the 25 HP engine, including crankshaft counter-weights and a single-piece crankcase/block.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan163 | |
| Date | 5th November 1930 | |
| ORIGINAL To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Ru. c. to Sg.{Arthur F. Sidgreaves - MD} WOr.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Ru.2/MJ.5.11.30. 25 HP. VIBRATIONS. x.634. x.5300. The difference between a normal crankshaft and a plain bar is so great that we feel that we must again try counter-weights, though previously they have never given us anything. The alternative is to hold the crankshaft from distortion by the C.I. crankcase and block cast in one. This we shall also have on test shortly. It is interesting to have confirmation that the flywheel is at least partially responsible for roughness. Report attached - He/GR.{George Ratcliffe}1/MJ.5.11.30. Hs{Lord Ernest Hives - Chair}/Ru. | ||