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).
Volumetric efficiency, anti-detonating characteristics, and proposed blowing tests on engine models.
| Identifier | ExFiles\Box 133\2\ scan0048 | |
| Date | 4th July 1934 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}11/KW.4.7.34. In the absence of apparatus for directly measuring volumetric efficiency we believe that a repetition of the blowing test on the metal as opposed to the wooden models, including getting an orifice coefficient for the exhaust valve and port, would be well worth while, also taking compression pressure curves of the Bentley Ramp and Kestrel Ramp units. We realise that good volumetric efficiency may be largely opposed to good anti-detonating characteristics; we have however in our existing standard Bentley head one that is exceptionally good for absence of detonation but inclined to be very rough; to try the alternative, therefore, would be exceptionally interesting. | ||