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).
Conclusions on 20 HP engine tests and proposals for further crankshaft and camshaft development for the Phantom and Falcon 10 engines.
| Identifier | WestWitteringFiles\Q\2April1927-June1927\ 116 | |
| Date | 31th March 1927 guessed | |
| contd :- -6- CONCLUSIONS : We have demonstrated by the above tests that we can make the 20 HP. RR. engine equal and better the performance of such engines as the Lorraine Dietrich. The B.M.E.P. curve given by the 20 HP. we consider superior to the Lorraine. Before we can take full advantage of these factors to increase the output it will be necessary to modify the crankshaft in order to avoid the main resonant speed which at present exists at 3200 r.p.m. This job is in hand in which the present crankshaft is being modified to take the 1-G-1 type of damper for the purpose of experiment. FURTHER DEVELOPMENT : It is proposed to prepare a similar camshaft for the Phantom. It is also proposed to carry out similar experiments on the Falcon 10 camshaft in order to obtain the maximum B.M.E.P. at the normal working speed of 2100 r.p.m. Hs{Lord Ernest Hives - Chair}/A.C.Lovesey. | ||