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).
Analysis of exhaust system power output with various parts, showing horsepower at the flywheel for different RPMs.
| Identifier | ExFiles\Box 66\2\ scan0021 | |
| Date | 10th February 1925 guessed | |
| ANALYSIS OF EXHAUST SYSTEM POWER OUTPUT WITH VARIOUS PARTS. (3) TABLE: H.P. at Flywheel. R.P.M., 1, 2, 3, 4, 5, 6, 7 2500, 112.5, 90.1, 99.5, 100.5, 114, 111.5, 113 2250, 113.5, 94.75, 101.3, 102.5, 113.5, 112.5, 112 2000, 109.2, 93, 98.4, 98.4, 109.5, 109.1, 109.4 1750, 100.5, 87.8, 92.2, 92.2, 98.6, 101.5, 100 1500, 88.2, 80.4, 82, 82.5, 87.25, 87.5, 88.4 1250, 73, 69.3, 69.8, 70.4, 73, 73.75, 72.9 1000, 58.3, 56.7, 56.25, 56.25, 59.2, 59.6, 59 750, 45, 43.6, 43.4, 43.4, 45.4, 43.4, 43.5 650, 41, 39.8, 38.9, 37, 40.25, 39.7, 39.4 KEY: 1. Complete system C.O. open. 2. Complete system C.O. close 3. Swan neck removed. 4. Silencer removed and of intermediate pipe stopped up. 5. Intermediate pipe removed 6. Front expansion chamber removed. 7. Open exhausts (corrected for temp. of hot spot.) Bar. 754.5. Temp. 18°C | ||