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).
Confirming the coil winding specifications for the 20 HP Chassis Dynamo.
| Identifier | ExFiles\Box 51\1\ Scan307 | |
| Date | 16th November 1923 | |
| X. 4383 To EFC. {E. Fowler Clarke - Electrical Engineer} BY {R.W. Bailey - Chief Engineer} /RD4/M16.11.23. X.4383 - 20 H.P. CHASSIS DYNAMO. Re EFC {E. Fowler Clarke - Electrical Engineer} 5/T16.11.23, will you kindly note that our instructions are "120 turns of 19 S.W.G. (.040) D.C.C Copper Wire per Coil" and we have no reason to think that this is not being done. BY {R.W. Bailey - Chief Engineer} /RD. | ||