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).
Requesting a test to determine the maximum permissible leak in a release valve to improve oil pressure recovery time.
| Identifier | ExFiles\Box 144\3\ scan0197 | |
| Date | 9th April 1937 | |
| 1220 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}5/R.9.4.37. He. mentioned at the Conference the other day that the Aero people had overcome the time taken for re-covery of oil pressure by having a leak in the release valve. This allows a rapid escape for the air. Will you find out on one of your test bed engines what is the maximum leak we could contemplate with-out at any time being short of oil pressure. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||