Valve timing specifications for RR.F. and H. supercharged engines.
| Identifier | ExFiles\Box 33\4\ Scan120 | |
| Date | 30th August 1928 | |
| RG. {Mr Rowledge} from E. {Mr Elliott - Chief Engineer} c. to BJ. Hs. {Lord Ernest Hives - Chair} BY. {R.W. Bailey - Chief Engineer} Lr. {Mr Ellor} X.1770 E1/M30.8.28. VALVE TIMING FOR RR.F. AND H. {Arthur M. Hanbury - Head Complaints} SUPERCHARGED ENGINES. Re. proposed timing for the above. R. {Sir Henry Royce} agrees to this as follows :- IN.14 14 EX. Clearance = .020" Angle between cams = 118º IN 70 70 EX. The valve lift however for RR.F. should not exceed its present value of .463", neither should the H. {Arthur M. Hanbury - Head Complaints} valve lift exceed .500" The valve lift curves should be of the compen-sated type as last designed for Condor(Aero Engine). E. {Mr Elliott - Chief Engineer} | ||
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).