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).
Extract detailing modifications to the oil pump for the American Model.
| Identifier | ExFiles\Box 77\1\ scan0152 | |
| Date | 27th September 1919 | |
| R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.3672. Extract from R6/G27.9.19. RE AMERICAN MODEL. OIL PUMP. Opposite hand and running in reverse direction. Alter worm drive. Oil piping same but left hand. | ||