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).
Engine specifications and proposed modifications for 'F' and 'H' type engines, focusing on camshafts and superchargers.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan027 | |
| Date | 16th December 1930 guessed | |
| - 4 - "R" type cams E.33096. 2.95" diameter chokes. Magnetos toggling 1° at full throttle. 8.8/1 supercharger gears. 10.25" supercharger rotor. Throttles 68° movement. The corresponding "F" MS. engine will have the same specification modifications but with 5.5/1 supercharger gear ratio instead of 8.8/1. We consider it is not certain that we have found the best camshaft for the "H" engine up to the present and we propose further tests are carried out to develop the required cam when sufficient data has been obtained on the 6/1 M.S. "F" engine now being tested to enable us to specify the type of cam required. The best existing "H" camshaft is the one tested i.e. E.33096. Hs{Lord Ernest Hives - Chair}/R.H. Dorey. Prints Att. 54 H.{Arthur M. Hanbury - Head Complaints} 60 H.{Arthur M. Hanbury - Head Complaints} 61 H.{Arthur M. Hanbury - Head Complaints} 62 H.{Arthur M. Hanbury - Head Complaints} 63 H.{Arthur M. Hanbury - Head Complaints} | ||