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).
Engine performance, detailing fuel detonation curves, M.E.P. limits for different cooling systems, and maximum jacket temperatures.
| Identifier | ExFiles\Box 173\2\ img083 | |
| Date | 25th January 1934 guessed | |
| XIII this curve with the fuel where detonation is suspected. If detonation is taking place the curve will fall away as shewn. [Graph] - Y-axis labels: B.M.E.P., Sh. Fuel LBS. - X-axis label: TOTAL FUEL LB/HR - Graph line labels: 99% POWER, NON DETONATING FUEL, DETONATING - Graph annotations: 10%, .43 With regard to the respective limit of M.E.P. on water Cooled and air Cooled engines, he has had no case on a multi cylinder engine where the design was at all comparable. On a single cylinder, however, where he sourroanded an air cooled cylinder with water, he found that the water cooled could stand 50% additional M.E.P. The figures he gave on one particular fuel was Air Cooled 200 M.E.P. Water Cooled 300 M.E.P. Ethylene Glycol. Max jacket temp permitted on Climb 300°F usual operating temp 250°F which they are not supposed to exceed. | ||