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).
Performance chart showing horsepower, torque, and M.E.P. curves under various test conditions.
| Identifier | Morton\M22\ img077 | |
| Date | 5th May 1921 guessed | |
| HORSE POWER, Torque, & M.E.P., Ft. Lbs., (Lbs. PER Sq: INCH), 40, 120, 50, 150, 60, 180, Dynamometer Test. Cut Out Open. M.E.P. & Torque Curve., Bench Test. Cut Out Closed. HP. Curve., Bench Test. Cut Out Open. HP. Curve., Dynamometer Test. Cut Out Closed. HP. Curve., Road Speed With B..., Road Speed With P..., Road Speed With..., (34.50...) | ||