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).
Conclusion regarding the temperature rise in a starter motor based on its short duty cycle.
| Identifier | WestWitteringFiles\I\July1922\ Scan23 | |
| Date | 10th December 1920 | |
| R.R. 235A (100 T) (S.H. 78S. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2047 (2) that the duty is so short that there is no serious rise of temperature in a starter motor, which is in reasonably good condition and a fair efficiency. [Signature] R.{Sir Henry Royce} | ||