C.A.V. dynamo for the 'Goshawk II' and recommendations for its brushes.
| Identifier | WestWitteringFiles\H\November1921\ Scan49 | |
| Date | 10th November 1921 | |
| To EFC. {E. Fowler Clarke - Electrical Engineer} from R. {Sir Henry Royce} Copy to CJ. " " WOR. {Arthur Wormald - General Works Manager} " " BY. {R.W. Bailey - Chief Engineer} F.O. NOV 10 1921 ORIGINAL 6 R10/G9/11/21. X. 4359V X.4342V, RE C.A.V. DYNAMO FOR "GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II". X.5348 X.3945 Regarding the C.A.V. dynamo, this seems to be the best one we have received. Apparently also the C.A.V. starter motor may also be considered the best. Regarding the brushes for these machines, it is advisable to use brushes with the least amount of copper in the mixture for the motor, and for the dynamo which is constantly running, I strongly recommend the single "O" quality of LeCarbone that has been found by Royce Limited to have such excellent lasting and wearing qualities; this was mentioned in a recent memo to you. Be sure there is no mistake about the class and make of brushes for our own make of motor and dynamo. R. {Sir Henry Royce} X | ||
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).