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 vibrations in a 25 HP engine.
| Identifier | ExFiles\Box 137\4\ scan0120 | |
| Date | 21th November 1930 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe} c.c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} Ds. c. to Ay. Ns.{Norman Scott} 634. Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}1/MJ.21.11.30. X.634. X.5300. 25 HP. VIBRATIONS. Continuing our report Hs{Lord Ernest Hives - Chair}/GEL/MJ.5.11.30., we have made the following further experiments on 12-G4. (1) Towed the car with bare crankshaft, flywheel (no clutch parts), and straight through drive to gearbox, and vibrations have been present. (2) Removed the cylinder head and block to lessen the rigidity of the crankcase which greatly amplified all vibrations. (3) Separated out the various static deflections due to loading the flywheel of 1V-G8.Unit. Hs{Lord Ernest Hives - Chair}/H.Grylls. | ||