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).
Gearbox noises, suggesting the cause is either incorrectly made gear teeth or a decline in the quality of ball bearings.
| Identifier | ExFiles\Box 75\1\ scan0156 | |
| Date | 31th August 1921 | |
| X.3426. 31.8.21. Extract from R2/G31.8.21. X.2628. X.2565. X.3426 Regarding gear box noises, no alteration has been made for a very long time in our gear boxes, and therefore it is a question of the Works getting the gear teeth right, unless it is possible the quality of the ball bearings has gone do-wn, in which case another make should be tried. R.{Sir Henry Royce} R.R. 255a (100 T) (S.H. 798 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2848 | ||