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).
Examination of Bentley dynamo failures, suspecting considerable night driving as the cause.
| Identifier | ExFiles\Box 162\1\ img076 | |
| Date | 3rd July 1937 | |
| WIP- Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} BY.2/G.3.7.37. FRANCO-BRITANNIC AUTOS Ltd - 5 JUIL 1937 12 AVENUE GEORGE V PARIS VA BENTLEY DYNAMO FAILURES. From an examination of the commutators on the two dynamos returned I gained the impression that the cause of the trouble was probably the result of considerable night driving. Before pursuing the matter further, therefore, I would like you to find out, if possible, whether the owners of the two chassis do much night driving. The point I have in mind is that the commutators were blackened apparently more as the result of sparking under high load conditions than the presence of oil or soft brushes. This condition could only arise, however, if the cars were repeatedly driven long distances at night with the lights on. The cars in question are :- (1). Chassis B.121.H.M. Mileage 8,453. Dynamo No. E.7.B.F. (2). Chassis B.122.J.D. Mileage 3,658. Dynamo No. S.8.B.R. BY.{R.W. Bailey - Chief Engineer} | ||