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).
Blueprint graph showing M.E.P. and Torque curves from Bench and Dynamometer tests.
| Identifier | Morton\M22\ img075 | |
| Date | 5th May 1921 guessed | |
| 100 300 90 270 80 240 Bench Test - Cut Out Open. - M.E.P & Torque Curve. Bench Test. Cut Out Closed. M.E.P & Torque Curve. Dynamometer Test. Cut Out Open. M.E.P & Torque Curve. | ||