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).
Page of various numerical calculations and jottings.
| Identifier | ExFiles\Box 16\2\ Scan004 | |
| Date | 11th February 1931 guessed | |
| 100 65.5- 34.5 87 11.75- 75.25 100 75.25- 24.75- 91 12.5- 78.5 100 78.5- 21.5 Dunchurch 15 7.75 6.75- 128 36 164 137 44 181 | ||