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).
Letter regarding the replacement of a Bijur dynamo and electrical output calculations for a 20 HP car dynamo.
| Identifier | ExFiles\Box 39\2\ Scan001 | |
| Date | 6th February 1919 | |
| R.R. 531w(50r) (S.G. 756. 24-2-20.G.2030) TO EH. from R.{Sir Henry Royce} c. EFC. X.3533 6th February 1919. R6/G6.2.19. X.3231. RE BIJUR DYNAMO. X.3762. X.3362. X.435. With reference to the Bijur dynamo, I am quite in agreement with you sending the one from 49-GB, to replace the one which is here belonging to the Packard Car. It should be ready to fit the same bracket as the plant is in daily use for the office. X.3533. Mr. Clark may be coming next week and might bring this together with other electrical parts which will serve for models, to guide same calculations. We are allowing for 60 watts as the output for the 20 HP. car dynamo, i.e. 12 volt 5 amps, cutting in at 8 to 900 revs - 600 engine revs. Will this be about right for a small limousine ? R | ||