The failure of exhaust valves on post-war 40/50 HP cars.
| Identifier | ExFiles\Box 38\4\ Scan046 | |
| Date | 1st August 1923 | |
| X3436 R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. {John DeLooze - Company Secretary} EXPERIMENTAL REPORT. COPIES TO: RCJ WOR. {Arthur Wormald - General Works Manager} By E Da {Bernard Day - Chassis Design} EP {G. Eric Platford - Chief Quality Engineer} OY Hm {Capt. W. Hallam - Head Repairs} Expl. No. X3436 X.2764 REF. Hsl/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} | ||
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).