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).
Testing a noisy Hyatt Roller Bearing and the policy of modifying parts based on the practice of the 40/50 HP model.
| Identifier | ExFiles\Box 180\M1\1\ img051 | |
| Date | 1st October 1921 | |
| R.R. 235a (100 T) (S.H. 798. 10-12-39) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948 Contd. -2- X4282 Hal/LGS.10.21. ********** Hyatt Roller Bearing. We tested the Hyatt Roller Bearing in the box by itself driving the shafts by means of a belt. There was no doubt about the noise coming from the roller bearing. We quite agree with your remarks, however, that American cars use these bearings and are silent. It may be that we have fitted the roller bearing too tightly which is the cause of it making the noise. We will test the bearing again with different clearances to see whether it will be more silent. *The policy we adopt in connection with troubles on Goshawk ll. is, whenever a part gives trouble we modify it so that it follows the practice which has proved successful on the 40/50 H.P.* FE. | ||