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 for P.2. and Japan models, exploring potential solutions for crankshaft and bearing configurations.
| Identifier | ExFiles\Box 137\4\ scan0175 | |
| Date | 17th January 1931 | |
| E.{Mr Elliott - Chief Engineer} HS.{Lord Ernest Hives - Chair}) FROM R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} ) (At Le CanadelHenry Royce's French residence.) C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} X63H R1/M17.1.31. CAR WORK - P. 2. & JAPAN. FLYWHEEL VIBRATIONS. I am not quite clear that we know if the larger crank-shafts proposed for our car work will keep the flywheel quiet up to maximum road speeds of 75 for Japan, and 90 for P. 2. with the present back axle ratio and road wheels. It may be thought that speeds are too high, but with favourable road and wind I think they will be touched, and although we hope that even if this type of vibration came on before the master period (torsional) of the crankshaft it would not be serious because they have existed for a long time with no serious trouble of wear or breakage, and they probably exist on most car engines. Supposing our stiffest shafts and the lightest flywheels that are permissible are not good enough one would suggest double rear bearings or a tail shaft into gearbox or flywheel casing. Since they say now that half time gears do not need changing would it not be better to put them at the back if double bearings are thought more practical than tail bearings. If you think so kindly send me the best scheme we know for the units. R.{Sir Henry Royce} | ||