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).
Request for the manufacture of two different camshafts for a Bentley (High Power) engine.
| Identifier | ExFiles\Box 85\3\ scan0044 | |
| Date | 5th May 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} x207 Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}14/KW.5.5.36. Bentley (High Power). Will you please have 2 camshafts made for development of the high power unit as follows :- 1st Camshaft. E.32381 inlet cam forms scaled down to .8648/1.00 ratio as previously arranged on Hs.{Lord Ernest Hives - Chair}965. E.59272 exhaust cam forms. Centre line of exhaust cam to lead the centre line of its inlet cam by 107.5°. Inlet cams to have .750" rad. followers. Exhaust to have standard Bentley roller followers. The timing of the shaft with .020" tappet clearance will be - I.O. 25° B.T.D.C; I.C. 50° P.B.D.C; E.O. 50° B.B.D.C; E.C. 5° P.T.D.C. 2nd Camshaft. E.32381 Inlet and exhaust cam forms, scaled down to .8648/1.00 ratio. Centre line of exhaust cam to lead the centre line of its inlet cam by 102.5°. .750" radius followers, both inlet and exhaust. The timing of this shaft will be - I.O. 25° B.T.D.C; I.C. 50° P.B.D.C; E.O. 50° B.B.D.C; E.C. 25° P.T.D.C. | ||