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).
The testing and modification of a Bentley Flexible Flywheel to achieve the desired flexibility.
| Identifier | ExFiles\Box 85\2\ scan0244 | |
| Date | 16th April 1936 | |
| X 212 To Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} HS{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}2/JH.16.4.36. EX. 21404 Bentley Flexible Flywheel The flywheel plate Ex. 21405 as supplied (.1875" thick) was considered to be too stiff, both torsionally, and under axial load, and it was eventually reduced in thickness, by .050", before the desired degree of flexibility was obtained. After the final grinding operation the plate was found to be distorted, the centre having sprung .060". Attempts were made to stretch the plate by loading and pressing, but although the centre was deflected .100" in the opposite direction to the set, the distortion remained practically unaltered. The torsion tests were performed with the damping plates free, but for the bending tests they were fully tightened. Finally the damping friction adjusting bolts were fully tightened and then gradually released until the desired amount of friction loading (1600 lb/ins approximately) was obtained. The accompanying graphs show (I) the variation in damping effected by releasing the damping plate nuts one, and two castellations each from the final setting, (II) the increase in axial flexibility with decreasing thickness - the standard G.56372 flywheel also being shown for comparison - and (III) the variation of torsional flexibility with thickness of plate. Hs{Lord Ernest Hives - Chair}/W.Bell. | ||