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).
Camshafts, supercharging, and gearboxes, with observations on competitor designs.
| Identifier | ExFiles\Box 173\2\ img063 | |
| Date | 13th February 1934 guessed | |
| II Camshafts:- I noticed that Hudson Essex ^as we have frequently done in the past^ used a very lop sided Camshaft, if we get one of the new Cars it will be worth studying as it must be efficient. - Generally speaking, I have not seen a Camshaft to give good slow running that has more than 1° or 2° overlap measured at .020 tappet clearance. Supercharging C.M. seem interested in the Graham supercharging. They say it gives them M.E.P. where they can use it. They already find they can get 110 H.P. at 4000 R.P.M. which is all they can use for because of detonation, hence they do not want boost low down. This reasoning is not correct I know but probably, when coupled with the torque reaction difficulty, (approx so.) They think the centrifugial easier to silence from Duesenbergs results but dont know much about it. Anyhow they are starting a considerable research. Gearboxes A factor has been established that if a box will stand 16 hours full torque | ||