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).
Tests conducted on the efficiency of valving for Phantom II and Bentley engines.
| Identifier | ExFiles\Box 17\6\ Scan135 | |
| Date | 24th August 1933 | |
| To Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Std. c. Wor.{Arthur Wormald - General Works Manager} C. c. S. By.{R.W. Bailey - Chief Engineer} c. Rg.{Mr Rowledge} Ds. c. FN. Bm. c. Lr.{Mr Ellor} Hs{Lord Ernest Hives - Chair}/Std.11/MA. 24. 8. 33. REPORT OF TESTS ON EFFICIENCY OF VALVING OF PHANTOM II AND BENTLEY ENGINES. General Purpose of Tests. This series of tests was made with a view to getting some comparison of the effects of head and port design on the volumetric efficiency of an engine - i.e. on the flow of mixture into the engine, and to determine whether the existing head design of R.R. Car engines could be said to approximate to the ideal in this respect. The tests were carried out on both Phantom II and R.R. Bentley units, the head designs of both being very similar. Tests were also conducted on an 8 litre cylinder block borrowed from the Bentley Co. Brief description of method of working. The efficiencies of valving and ports of individual heads were compared by comparing the air flows through such ports and valves for each head under similar conditions. The reasons for using this method and assumptions and calculations necessitated are dealt with in the attached appendix. List of Tests carried out and brief description of same. (A) - Phantom | ||