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).
Analysis of different timing drive schemes for the B60 engine, including metal gears, chain drive, and Wraith spring drive.
| Identifier | ExFiles\Box 124\2\ scan0128 | |
| Date | 15th April 1940 guessed | |
| -2- The various schemes possible for the B60 are:- 1. Metal timing gears: This is a step backwards and likely to be noisy. 2. Chain Camshaft Drive: In this case the camshaft would have to be fully located either by two way thrust faces or by reversing the direction of the thrust, the latter alternative being the best. 3. Wraith spring drive: To determine whether or not the chain will stand up, I suggest that the engine allocated for endurance should be fitted with a suitable chain and a fully located camshaft either by reversing the helical angle of the oil pump and distributor gears or by providing a forward thrust face to P.L.7 or to E.CD-1529. Rm{William Robotham - Chief Engineer}/JRS | ||