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).
Bensport J.1. tachometer drive, its design, modifications required, and a request for fitting.
| Identifier | ExFiles\Box 62\3\ scan0308 | |
| Date | 2nd December 1932 | |
| 86142. To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} c.c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} RHC.{R. H. Coverley - Production Engineer} re Bensport J.1. - Tachometer Drive. Please receive herewith: LeC.3293 showing the tachometer drive on the end of the dynamo. This is a small epicyclic reduction gear making the speed of the tachometer drive shaft a quarter engine speed. The armature shaft of the dynamo is the only part affected, and we were obliged to modify this because of the close proximity of the exhaust downtake pipe. We should like this drive to be fitted to the first experimental chassis. E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}2/HP.2.12.32. | ||