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).
Summary of two tests conducted on the Development Hawk 114° camshaft regarding exhaust duration and valve lift.
| Identifier | ExFiles\Box 179\2\ img019 | |
| Date | 7th December 1931 | |
| R.{Sir Henry Royce} FROM HR/sn.{Mr Sanderson} c. to Mr. H.F. c. to Mr. Ds. c. to Hy.{Tom Haldenby - Plant Engineer} HR/sn.{Mr Sanderson}2/HA.7.12.31. X7010 DEVELOPMENT HAWK 114° CAMSHAFT. We carried out two tests on this camshaft. (1) M.P.37. This test was to determine whether any advantage would be gained from a shorter duration exhaust cam. The results shew that there is nothing to be gained by shortening the duration of the exhaust cam on E.{Mr Elliott - Chief Engineer} 32448, the "M.V. 114° shaft." (2) M.P.38. This shows that we can expect to gain nothing further on this shaft by increasing the valve lift with the existing size of valves. HR/Rm.{William Robotham - Chief Engineer} M.P.37. and M.P.38 attached: | ||