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).
Performance graph showing engine Brake Horsepower against RPM to illustrate power loss caused by a water-heated induction pipe.
| Identifier | ExFiles\Box 65\4\ scan0317 | |
| Date | 20th July 1925 | |
| SHEET 1. ENGINE WITH OPPOSED PLUGS & INDUCTION PIPE IN CYLINDER HEAD. LOSS OF POWER CAUSED BY WATER HEATED INDUCTION PIPE. TEST BENCH EXH. SYSTEM WITH CUT OUT OPEN 4.2 TO 1 COMPN RATIO 20/7/25. BAR.756. B.H.P R.P.M. WITH HOT SPOT & AVERAGE WATER TEMP 35°C WITH HOT SPOT & WATER TEMP AT 80°C WITH WATER TEMP. 80° AND NO HEAT TO HOT SPOT LOSS WITH WATER 80°C REL. TO WATER AT 35°C. HP LOSS TO WATER HEATED INDN. PIPE A.C.L. 20/7/25 | ||