Design modifications for the camshaft driving gear for the Wraith III and Bentley III, specifically a version without the cam balancer.
| Identifier | ExFiles\Box 7\8\ X 607 Camshaft-page14 | |
| Date | 17th February 1938 | |
| WEALD C. to Rm. {William Robotham - Chief Engineer} 607. Haler DA. {Bernard Day - Chassis Design} 6/9.17.2.38. WRAITH lll and BENTLEY lll. CAMSHAFT DRIVING GEAR WITHOUT CAM BALANCER. Please receive herewith E.CD.478 Camshaft Driving Gear without Cam Balancer - Wraith lll & Bentley lll. This design is in accordance with request in memo Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 7/NH.27.1.38. and in addition to showing the cam balancer deleted also calls for the following modified features :- (1). The oil supply hole drilling to front camshaft bearing is simplified. (2). A modified type of fixing for the Fabroil to the metal centre of the cam wheel is shown. (3). The spherical feature on the camshaft thrust plug has been moved from the plug in the wheelcase to the plunger in camshaft. In item (2) the lugs for holding the Fabroil portion of the gear are forged to finished size, the centre part of wheel is otherwise machined all over. The reason for the alteration item (3) is to ensure that the contact point of the plunger is on the axis of the camshaft, as the wheelcase is not accurately located at this point. Will you please detail and instruct the necessary parts to be made for this experiment. DA. {Bernard Day - Chassis Design} Swdll | ||
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).