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).
Monthly bar chart from 1939 tracking the frequency of various vehicle component faults.
| Identifier | ExFiles\Box 131\3\ scan0094 | |
| Date | 22th June 1939 guessed | |
| 1939 JAN FEB MARCH APRIL MAY JUNE HYDRAULIC SHOCK DAMPERS A - OIL LEAK B - INTERNAL KNOCK C - ADJUST RIDE CONTROL D - CONNECTING LINKS SLACK E - TIGHT PISTONS P177 P171 GEAR BOX NOISY A - COMING OUT OF ENGAGEMENT B - OIL LEAK C - STRAINED SELECTOR GATE D - WORN BEARINGS E - GEARS NOISY SEIZED W292 W314 DYNAMO TROUBLES A - OILED UP COMMUTATOR B - FAULTY REGULATOR C - BRUSH STICKING D - DRIVE RATTLE 7 W317 RACE NOISY N 87 W 317 W 322 ROAD WHEEL HUBS RUBBING A - ADJUST END FLOAT B - FAULTY RACES P 16 CLOCKS FAULTY W340 PETROL GAUGE FAULTY T - TANK UNIT G - GAUGE P 174 W 284 W 301 P 224 P 218 AVERAGE MILEAGE JAN B 41000 D 36400 FEB B 26800 MARCH B 30050 D 25000 APRIL B 26080 D 18000 AVERAGE MILEAGE JAN A 3500 B 10000 APRIL B 23700 AVERAGE MILEAGE JAN 16000 FEB 4800 GWH{George W. Hancock - Head Chateauroux} 7 | ||