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).
Graph comparing engine RPM against lift in pounds for 3rd gear and top gear, showing average performance and proposed minimums.
| Identifier | ExFiles\Box 69\4\ scan0384 | |
| Date | 1st August 1928 guessed | |
| Hs{Lord Ernest Hives - Chair} R.P.M. 2750 2500 2250 2000 1750 1500 1250 1000 750 500 Average AL 3rd gear Average CL 3rd gear Present minimum Proposed new minimum 3rd gear Average AL Top gear Average CL Top gear Present minimum Proposed new minimum Top gear LBS. LIFT 190 180 170 160 150 140 130 120 DYND.WN/500 33" wheels 15/52 Axle | ||