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).
The ramming effect in induction systems, detailing volumetric efficiency and power increases on the Kestrel cylinder.
| Identifier | ExFiles\Box 134\2\ scan0056 | |
| Date | 30th October 1935 | |
| - 5 - Hs{Lord Ernest Hives - Chair}/Wd.{Mr Wood/Mr Whitehead}1/GB.30.10.35. (e) The ramming effect depends very much on the induction system and with perfect valves a volumetric efficiency of 200% can be obtained; actually with the Kestrel cylinder a volumetric efficiency of 140% has been recorded by ramming and a test on the ramp single cylinder under power with a ramming induction pipe gave an increase in power of 22% compared with the normal induction system. It is estimated that on the old No.4 bed the ramp cylinder gave 5% more power than the Kestrel owing to more efficient use of the ramming effect present. (d) 2 or 3 M.E.P. may be lost on the suction stroke reducing the B.M.E.P. by this amount. This work is being continued to assist the design department in the development of inlet ports. --------- Hs{Lord Ernest Hives - Chair}/Wd.{Mr Wood/Mr Whitehead}/R.W.Corbitt. Attach 4 prints. | ||