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).
Various vehicle component failures, their frequency, and average mileage at occurrence.
| Identifier | ExFiles\Box 107\2\ scan0242 | |
| Date | 11th March 1937 | |
| -3- 11.3.37. (8) 12 Speedometer trip faulty 4¼ - average mileage 4,503 10 " " 3½ - " " 24,319 (9) 10 Misfires due to Ethyl Petrol 10 " " 4¼ - " " 5,139 " " 3½ - (10) Front engine suspension bearing causing knocks 5 - 4¼ - average mileage 14,789 11 - 3½ - (11) 7 failures of water leaks from No.2. cylinder plate. 40 " " " 4¼ - average mileage 6,419 " " " 3½ - (12) 6 Faulty clocks 9 " " 4¼ - " " 3,940 " " 3½ - " " 18,000 (13) 4 Failures of rear silencer Baffles coming loose - 4¼ 5 " rear snout anchorage rattles - av. mileage - 6,300 (14) 6 Failures 4¼ comprising - Brush noise and voltage regulator - av. mileage 10,712 20 Failures - 3½ Brush noise and sticking - " " 25,381 (15) 2 Failures of Petrol Tank leaks from rivets underneath. ____________________ (1) Axle Failures. Driving Dogs. This complaint has been known for some considerable time. The Expt. Dept. have, within the last two months, conceived a design which is now being tried out on 6.B.IV in France. The average mileage shows up the weakness. Noise. This is due to the weakness in the pinion bearing. It is not capable of taking the torque. The gears become out of alignment, and noise develops. The latest GB.2035 roller bearing is not standing up to the job. Three nose pieces and bearings have been sent to Kingsbury for test on the Trials Cars, to design Ex.23493, also on N.Sch.4985 is to be tried when the parts arrive. | ||