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).
Graph comparing fuel consumption (pints per HP hour) against engine RPM under three different throttle and exhaust test conditions.
| Identifier | ExFiles\Box 50\3\ Scan274 | |
| Date | 14th January 1924 | |
| ENGINE R.P.M. PINTS PER HP HOUR Test No 2. Solid line - Hot throttle with exhaust blowing straight thru jacket. Boilers on. Test No 3. Dotted line - Hot throttle, cock turned off, exhaust cannot blow thru jacket. Boilers on. Loaded up at 500 RPM. Test No 1. Broken line - Standard Springfield scheme. THROTTLE HEATED TO MAKE COMPARISON AT 2000 RPM DISTRIBUTED BY CHICAGO BLUE PRINT CO. NO 346 BY CK {Mr Clark} 'D BY ON Jan 14-24 | ||