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).
Further experiments on flywheel vibrations for a 25 HP engine.
| Identifier | ExFiles\Box 137\4\ scan0098 | |
| Date | 20th October 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.c. to E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} c.c. to Ev.{Ivan Evernden - coachwork} x634 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}1/WJ.20.10.30. y634 xA300 FLYWHEEL VIBRATIONS ON 25 HP. Continuing our report Hs{Lord Ernest Hives - Chair}/GRL/WJ.2.10.30. on flywheel vibrations, we have made the following further experiments. - (1) To obviate the constraint of our straight through drive from crankshaft to gearbox we fixed this drive to the flywheel by rubber bushes. The usual period was still present beginning at 2200 R.P.M. (2) Retaining rubber mounted drive and removing clutch parts, the period still began at 2000 R.P.M. (3) Increasing the overhang of the flywheel by 1/2" does not effect the period. (4) Towing the car with pistons and connecting rods absent the period is still unaltered. | ||