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).
Experiments investigating flywheel vibrations on a 25 HP engine.
| Identifier | ExFiles\Box 5\6\ 06-page070 | |
| Date | 2nd October 1930 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe} c.c. to Sc. Wor.{Arthur Wormald - General Works Manager} c.c. to Ss.{S. Smith} Z. c.c. to Da.{Bernard Day - Chassis Design} Ey. COPY. YS309 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}1/WJ.2.10.30. X.634. X.S300. FLYWHEEL VIBRATIONS ON 25 HP. Experiments on 12-G4. shewed that - (1) With Std. flywheel the vibration period is at 3100 R.P.M. (2) With flywheel of 32% less inertia the period was unchanged. (3) With lever plate, pressure plate and driven member removed, a straight drive from the crankshaft to the gearbox being fitted, the period had vanished. (4) Retaining the straight through drive and putting back all the moving parts, the period was still non-existent. | ||