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).
Table of figures showing automatic advance settings for the WAC.2 engine.
| Identifier | ExFiles\Box 65\1\ scan0009 | |
| Date | 21th August 1924 | |
| X8685 21.8.24. X.3949. AUTOMATIC ADVANCE FOR WAC.2 ENGINE. X8685 (Figures supplied by Hs.{Lord Ernest Hives - Chair} showing maximum and minimum engine degrees B.D.P. at which maximum power is maintained for various speeds). Speed. B.D.P. Maximum. Minimum. 500 22º 15º 650 26 20 Note 1. 750 31 24 Engine degrees 1000 39 29 and speeds throughout. 1250 44 35 1500 46 39 Note 2. 1750 47 39 2 to 3% less advance 2000 51 41 required when using 2250 54 44 both ignitions. 2500 56 47 3000 58 50 EFC. | ||