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).
Engine improvement by reducing friction on the slipper drive.
| Identifier | ExFiles\Box 74\2\ scan0263 | |
| Date | 24th November 1919 | |
| R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. V.3489 COPY. BN.{W.O. Bentley / Mr Barrington} c. to EH. EP{G. Eric Platford - Chief Quality Engineer}4/F24.11.19. RE IMPROVEMENT TO ENGINE BY REDUCTION OF FRICTION ON SLIPPER DRIVE. In view of the point raised in recent correspondence between R.{Sir Henry Royce} and the Works, with reference to engine vibrations and re-adjustment of the slipper drive, we have on several cars on test reduced the friction of the slipper drive, half the number of springs being taken off, and in doing so, consider that some improvement has been obtained as regards reduction of the vibrations. We have certainly confirmed the fact that there is no disadvantage in doing the above, and from the "feel" of the friction, it is amount which we require, judging from our early experiments on the slipper drive, and the fact that the mass of the slipper drive has now been reduced. I am dealing with cars on test as above described, and look upon this as an adjustment to obtain satisfactory engine running. I should be glad, however, if Mr. Hives will confirm the fact that this practice should be standardised, which he has promised to do. EP.{G. Eric Platford - Chief Quality Engineer} | ||