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).
Tests conducted on flywheel vibrations for the 25 HP engine.
Identifier | ExFiles\Box 137\4\ scan0390 | |
Date | 30th September 1931 | |
x634. 30.9.31 X.634. X.5300. 25 HP. FLYWHEEL VIBRATIONS. We have carried out further tests on the tail bearing to LeC.2920. The first test on 19-GIV in conjunction with a stiffened flywheel to GL.{G. Linnett}475 lowered the period from 3300 to 3000 r.p.m. and increased its intensity. We therefore tried the bearing on a thin (1/8") flange flywheel on 12-GIV. This eliminated the period but the engine (14-G6) was not very smooth at high speeds. We then tried the thin flywheel without a tail bearing. Under this condition there was a very slight vibration on drive and over-run at 2700 r.p.m. During the vibration the flywheel ran .012 out of truth in a vertical plane. A small amount of balance should eliminate this. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||