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).
Page discussing future investigations for the Eagle 1X engine, including induction systems and valve bounce analysis.
| Identifier | ExFiles\Box 43\1\ Scan092 | |
| Date | 25th September 1924 | |
| R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -6- Expl. No. REF HS{Lord Ernest Hives - Chair}/TAG/LG28. 8. 25. It would appear that the line of investigation to be followed would be with the idea of improving the power output at low speeds when the Eagle 1X. type carbs. and induction pipes are fitted. As high speed aero engines are, apparently, going to be the engines of the future, the Eagle 1X. induction layout has much to recommend as will be seen by the foregoing curves, and incidentally if the high speeds are to be adopted, experiments with camshafts giving a little more overlap might prove interesting. It is proposed to try out an induction system similar to that of the Condor 111. and 1V. engines on an Eagle. Indicator diagrams, especially of the light spring type, might be very useful in connection with the improvements on the induction system and will be taken at the first opportunity. More evidence could be collected that would probably help in explanation of the 'kink' spoken of earlier in this report. VALVE BOUNCE. Valve action was observed with the oscilloscope showed no bounce up to 2300 r.p.m. either with the inlet or exhaust valves. Seething and swaying in the springs was observed at all speeds. The engine ran quite comfortable at 2400 r.p.m. full throttle. GENERAL. For the tests a spirit of 50% Aviation and 50% benzol was used, having a specific gravity of .775 at 15°C temp. A 25% Aviation and 75% Benzol was tried but made no contd :- | ||