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).
The limitations of control settings at different speeds.
| Identifier | ExFiles\Box 168\3\ img184 | |
| Date | 23th May 1939 | |
| -2- HY{Tom Haldenby - Plant Engineer}/RD.2/B.23.5.39. The limit of 1° at slow speed is often too fine whereas 1° at high speed is often too coarse. HY{Tom Haldenby - Plant Engineer}/RD Att: C.1. C.2. C.3. | ||