Rolls-Royce Archives
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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).
Vehicle failures, their frequency, and average mileage at which they occurred.

Identifier  ExFiles\Box 131\4\  scan0091
Date  11th March 1937
  
-2-

Pulling Uneven N.S. 4¼ - 14 average mileage 6,473
N.S. 3½ - 23) " " 20,464
O.S. " - 15)

Thumping of brakes. 4¼ - 16 " " 8,754
3½ - 39 " " 14,483

Juddering of Front. 4¼ - 2 " " 14,237
3½ - 6 " " 20,487

Fierce Rear 4¼ - 6 " " 6,237
Fierce Front 3½ - 5) " " 20,851
" - 8)

Oil on Fabrics. 3½ - 6 " " 22,273

(3) Clutches. 74 failures comprising:-

Jaggers 4¼ - 16 average mileage 6,000
Worn Out 3½ - 33 10,000 to 30,000
Slipping 4¼ - 1 average mileage 19,177
3½ - 18
Fierce 3½ - 2
Slow Stopping 4¼ - 2
3½ - 2

(4) 14 Failures of Dynamo drive comprising scrubbing of rubber blocks causing a rattle 4¼ - average mileage 7,900.

(5) 27 Front Axle controls, comprising:-
slack and end play in bottom bearings causing rattle and brake judders -
4¼ - average mileage 8,753
3½ - all cars are checked - 105 cases dealt with.

(6) 44 Noisy Rev. Counter Drives
4¼ - average mileage 4,414
24 " " 3½ - " " 21,320

(7) 23 Speedometer drive noisy -
4¼ - average mileage 4,876
  
  


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