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).
The cause and cure for the failure of exhaust valves on post-war 40/50 HP cars.
| Identifier | ExFiles\Box 35\3\ scan 041 | |
| Date | 15th August 1923 | |
| R.R. 403 (40 H) (SL 42 12-7-23). J.H. D.{John DeLooze - Company Secretary} X2764 EXPERIMENTAL REPORT. COPIES TO: R.C.J. W.O.R. By.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} OY. HM.{Capt. W. Hallam - Head Repairs} Expl. No. Y3486 2764 REF. Hs{Lord Ernest Hives - Chair}1/LG15. 8. 23. OBJECT OF TEST. To find cause and cure for failure of Exhaust Valves on post-war 40/50 H.P. cars. TESTER. A.{Mr Adams} C. Lovesey. CONDITIONS. Tests carried out on engine bench with standard 40/50 H.P. engine. SUMMARY OF TEST. A number of Exhaust Valves have failed on post-war cars. We have no record of similar failures on pre-war cars. Tests show the reason why the pre-war valve is free from trouble is because the stem elongates only .0015" under full power compared with .009" on the post-war type valve under similar conditions. We recommend we revert to the pre-war shape of Valve. Hs.{Lord Ernest Hives - Chair} | ||