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 power improvements with long duration cams and collaboration with aircraft manufacturers.
| Identifier | ExFiles\Box 43\3\ Scan185 | |
| Date | 18th September 1928 guessed | |
| CONTD :- -3- With the long duration cams, the ground level power at full throttle, 29.9" Hg Barometer, 15°C temp., is 730 B.HP. at 2250 ) 820 B.HP. at 2500 ) 100% Benzol There appears to be an appreciable increase in B.HP. with the long duration camshafts. Mr. Radcliffe, the Vickers Aerodynamic expert, was favourably impressed with the results, and returned with the intention of readjusting his calculations. It is, I think, extremely desirable that we should continue to co-operate with the aircraft manufacturers with a view to obtaining an agreement between their analysis of performances and our predicted powers. We have now three comparisons of engines fitted with the long duration cams, all of which shew the same characteristics. At a later date I hope to compare these and detail a modified method of correction, as the latter differs from that laid down by the Air Ministry. Lr.{Mr Ellor} | ||