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).
Bar chart tracking various engine faults, their causes, and frequency from January to June 1939.
| Identifier | ExFiles\Box 131\3\ scan0045 | |
| Date | 1st January 1939 guessed | |
| 1939 JAN FEB MARCH APRIL MAY JUNE ENGINE THROTTLE STICKING DUE TO RETURN SPRING STRETCHING DISTORTION OF THROTTLE BODY GUMMINESS A - NEW SPRINGS B - LUBRICATED C - DISTORTED MODIFIED SPRING ANCHORAGE AND NEW SPRING IS BEING FITTED B 3C 13 A 17 B C A W 301 NOISY VALVE GEAR DUE TO WORN TAPPETS ROLLERS AND PINS 21,000 MILES. HEAVY OIL CONSUMPTION K P 169 P 161 P 159 W 316 POOR PERFORMANCE IRREGULAR SLOW RUNNING W 301 VALVE SEATS DISTORTED M.R. SERIES EXHAUST MANIFOLD STUDS BROKEN GWH{George W. Hancock - Head Chateauroux} 3 | ||