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).
Page two of a memo discussing modifications and testing of a double rear main bearing and flywheel.
| Identifier | ExFiles\Box 127\4\ scan0049 | |
| Date | 17th June 1937 | |
| -2- A.Taub Esq. June 17th.1937 (10) A double rear main bearing with a timing wheel between the bearings did not give immunity from trouble and a thin flange flywheel was still necessary. We took a lot of measurements optically with the gearbox removed and found these useful for quick determination of benefits or otherwise of modifications. With the gearbox removed all vibrations were about 500 r.p.m. lower. Its stiffness effect of the gearbox attachment is shown on G.54793. We attach a sketch of the optical apparatus and also a photograph of a sample of records. Yours sincerely, | ||