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 plotting oil flow through bearings against engine RPM for car 12.EX.
| Identifier | ExFiles\Box 16\1\ Scan186 | |
| Date | 2nd May 1927 guessed | |
| OIL FLOW THROUGH BEARINGS ON CAR. 12. EX PRESS 17.5 - 27 lbs/[]" OIL FLOW PTS/MIN. 3 2 1 0 R.P.M. 500 1000 1500 2000 2500 acp | ||