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).
Differences between Lucas and Watford drawings for a 40/50HP Chassis Magneto.
| Identifier | ExFiles\Box 40\2\ Scan058 | |
| Date | 8th October 1925 | |
| X8793 To EFC. BY/SS{S. Smith}3/DB.{Donald Bastow - Suspensions}8.10.25. Re 40/50HP Chassis - Magneto. We have checked up Messrs Lucas's drawing M.416-A, with our standard Watford E.71374, and find the following differences:- 1. The Thread on the Driving Spindle is 7/16 B.S.F. on Lucas and 3/8" Whit. on Watford. 2. The taper of Driving Spindle is 1 in 5, which works out at 11°-25' not 11½°, as shown on Messrs Lucas' drawing. 3. The control lever should be left blank for drilling at Derby. BY/SS.{S. Smith} | ||