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).
Selection and testing of three potential dynamos for the Rationalised Range.
| Identifier | ExFiles\Box 168a\3\ img039 | |
| Date | 24th February 1940 | |
| 6142 Hm{Capt. W. Hallam - Head Repairs}/RC.{R. Childs} Rm.{William Robotham - Chief Engineer}4/ML.24.2.40. Dynamos for the Rationalised Range. There are three potential machines available: Lucas 4½", Lucas 5", and R.R. 5". We think that we should carry on with testing all three machines. It seems doubtful if the 4½" machine would be big enough for anything larger than the 4-cylinder cars. Judging by our experience on the Bentley and with the latest R.R. improved 72-slot armature 5" machine should cater for any conditions which are likely to arise. Two essentials to enable the machine to cope with the job:- (1) The use of S.A.E. 20 oil. (2) The use of 48 watt. hedlamp bulbs. Hm.{Capt. W. Hallam - Head Repairs} | ||