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).
Issues with flywheel vibration and proposing a trial with a thinner flange.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan324 | |
| Date | 21th July 1931 | |
| HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} [Strikethrough]C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager}[/Strikethrough] [Strikethrough]C. to E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer}[/Strikethrough] ORIGINAL 'CHINA' - FLYWHEEL [Strikethrough]WHIRL[/Strikethrough] Vibration. R2/M21.7.31. x634. x5300 In stiffening this with extra bearing and stiffer flange the result is much worse, and I think: (1) We have now carried the period up to a speed where the disturbing forces are great. (2) That we carry the effect to the wheel by the stiffer flange. (3) That the period is not out of the engine range; (not high enough.) Therefore the extra bearing is not wrong, but the stiff flange is, and a trial should be made retaining the extra bearing and making the flywheel flange quite thin so that the crank deflection is not carried to the flywheel, and perhaps without the extra bearing it would be quite OK. because the period would be so low that the inertia forces would be very small and not disturb the flywheel. [Signature] R.{Sir Henry Royce} | ||