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).
Hand-drawn plan of an oil pump and piston assembly for reverse torque.
| Identifier | ExFiles\Box 180\M2\M2.1\ img004 | |
| Date | 22th July 1918 | |
| OIL PUMP IS SHOWN CONNECTED ONLY FOR PISTON TEST & HALF DUTY CRANK TEST. SEE MEMO ATTACHED HOLES THROUGH TO CROWN OF PISTON TO GET PRESSURE UNDER THE CROWN ORDINARY MOTOR CYLINDER FOR REVERSE TORQUE PLAN E/6267/8 OEZ 22/7/18 | ||