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).
The camshaft timing for the Goshawk II engine, detailing indicating devices and permissible errors.
| Identifier | WestWitteringFiles\F\April1921\ Scan14 | |
| Date | 9th April 1921 | |
| To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} Copy to Col. " " HS.{Lord Ernest Hives - Chair} X4229 RE "GOSHAWK II" - CAMSHAFT TIMING. We attach herewith drawing Lec.1377 giving details of some indicating devices which will be required on the wheelcase. These arrangements are necessary to enable the assemblers correctly mesh the half time wheels. The markings on the wheels, the fan pulley, and the crankshaft, are required to be made in their correct position with relation to the top dead centre of No.1 crank, but the teeth on the gear wheels can be cut anywhere. This latter condition introduces a slight permissible error in the timing of the engine. E.{Mr Elliott - Chief Engineer} | ||