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).
Design of a spring-mounted tachometer drive on a camshaft, referencing drawing LeC.2331.
| Identifier | ExFiles\Box 43\3\ Scan088 | |
| Date | 12th March 1926 | |
| To EY. from E.{Mr Elliott - Chief Engineer} c. to BJ. RG.{Mr Rowledge} HS.{Lord Ernest Hives - Chair} V4003 E/1/M3.12.26. RR. F.10. TACHOMETER DRIVE. X.4003. X.2063. We send you herewith drawing LeC.2331. shewing the RR.F.10 tachometer drive on camshaft. We believe the pinion as shewn can be applied to an existing camshaft, but for the drive itself a new valve gear cover is required. The gear is arranged on a spring mounting so that if it does not mesh, no damage will result when the cover is placed on the engine. We believe that a gear is being drawn in Derby in which a driven wheel is arranged side by side with the pinion on the camshaft, with the idea that the gear will roll round when the cover is dropped on the engine. R.{Sir Henry Royce} however points out that this gear can still be made to jam. E.{Mr Elliott - Chief Engineer} | ||