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).
The production test of a 20 HP dynamo, detailing three minor faults observed.
| Identifier | ExFiles\Box 51\1\ Scan414 | |
| Date | 31th March 1925 | |
| X.4383. To Mr. Brock. from EFC. {E. Fowler Clarke - Electrical Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 7/T31.3.25. X.2383. 20 HP. DYNAMOS. Herewith we return to you 20 HP. dynamo 1504, having made the desired observations. As regards performance, we find this machine satisfactory to our present production test with the exception of one or two minor points which are as follows :- (1) We find the positive brush spring pressure to be rather light, i.e. 11 ozs. (2) The clearance between the control brush holder and the commutator is somewhat in excess of our limit given. (3) Commutator end cover fouls oil cap slightly, also drive locking spring ring. EFC. {E. Fowler Clarke - Electrical Engineer} | ||