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 receipt and testing of a sample Lucas E.5RR dynamo for the Goshawk.
| Identifier | WestWitteringFiles\G\September1921\ Scan92 | |
| Date | 20th September 1921 | |
| R.R. 235A (100 T) (S.H. 798. 10-12-20) G 2947 ORIGINAL To R & E from EFC. c. CJ & PN.{Mr Northey} c. By & EP.{G. Eric Platford - Chief Quality Engineer} c. Eg & Da.{Bernard Day - Chassis Design} c. R.R. of America Inc. X,4359L - LUCAS E.5RR Dynamo for "GOSHAWK". We have recently received from the Lucas Company the first of the two sample Lucas dynamos for the Goshawk, this having been made up for us in accordance with our requirements mechanically and electrically as regards output curve. The suggestion of using the single field winding third brush control for this machine for the Goshawk has been put to them on several occasions, owing to the simplification of the wiring and the fact that it is possible to produce, with this system of control, an output curve more exactly corresponding to what we consider the requirements for the chassis dynamo to be. Messrs. Lucas at first raised some objections to this system of control, which objections we have already reported. Latterly, however, they stated that they had quite an open mind on the question and said they would build two machines for the Goshawk, one with their standard system of control and one with the single field winding third brush. The one we have now received and tested is the former of the two. As was stated to Messrs. Lucas, one good reason why we preferred the simple scheme was the reduction in the number of conductors (three instead of four) between the switchbox and the dynamo, and we understand that on the Contd. | ||