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).
Flywheel vibrations by adjusting the balance of the crank web.
| Identifier | ExFiles\Box 85\2\ scan0154 | |
| Date | 7th February 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} x212 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}11/KW.7.2.35. Flywheel Vibrations. We want to find out whether we can still eliminate this trouble by having 100% balance of the crank web nearest the flywheel. We cannot increase the size of all the balance weights owing to lowering the torsional period. We intend therefore to lighten the front weight by as much as we increase the back one. Will you please prepare a pair of weights to Hs.{Lord Ernest Hives - Chair}1756/7, and make sure they are in static balance on the narrow pin crankshaft in B-10. We can then fit them in a car and get comparative results. After fitting please replace the standard weights and retain Hs.{Lord Ernest Hives - Chair}1756/7, so that the changeover can be made when required. We realise the shaft will not be in dynamic balance, but have to find out whether this matters. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||