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).
Report estimating the variations in tappet clearance for an overhead camshaft engine due to temperature effects, comparing a Standard Head and a Ramp Head.
| Identifier | ExFiles\Box 133\2\ scan0162 | |
| Date | 2nd July 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} King (handwritten) Hs{Lord Ernest Hives - Chair}/Smth.12/KW. 2.7.35. Overhead Camshaft Engine. Variation in Tappet Clearance. From measurements we have made on a Bentley engine, we estimate that on an overhead camshaft engine of Bentley size with an aluminium head, the following would be the variations in tappet clearance due to temperature effects :- Standard Head. Table 1: Headers: Exhaust Valve, Inlet Valve Sub-headers: KE.965, Silchrome, Silchrome Row 1: Starting Up, - .005, - .0035, 0 Row 2: Engine Hot, - .0015, + .0015, + .003 Ramp Head. Table 2: Headers: Exhaust Valve, Inlet Valve Sub-headers: KE.965, Silchrome, Silchrome Row 1: Starting Up, - .005, - .0035, 0 Row 2: Engine Hot, + .0005, + .0035, + .005 | ||