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).
Graph showing oil flow through hand-fitted bearings against engine RPM.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan110 | |
| Date | 4th May 1926 guessed | |
| OIL FLOW THROUGH BEARINGS ON CAR. 12. EX. PRESS 17.5 - 27 lbs / □'' HAND FITTED BEARINGS OIL FLOW PTS/MIN 0 1 2 3 R.P.M. 500 1000 1500 2000 2500. aeb | ||