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 an exhaust heated system's performance, with a graph comparing warm-up times for various configurations.
| Identifier | ExFiles\Box 66\2\ scan0215 | |
| Date | 1st July 1926 guessed | |
| contd :- -2- (2) Standard without the exhaust butterfly. (3) Standard with the outlet pipe from hot spot leading directly into the atmosphere and no butterfly valve. (4) Superheat system with .062 diameter water feed hole. (5) Do. with .025 feed hole. Graph Text: Y-Axis: TEMP °C. X-Axis: TIME - MINS Top Curve Label: STD WITH BUTTERFLY CLOSED Middle Curve Label: NO BUTTERFLY HOT SPOT EXHAUSTING INTO THE ATMOSPHERE Bottom Curve Label: STD WITH BUTTERFLY OPEN Box Label: VOL. OF WATER IN HOT SPOT FOR HEATING = 355 C.C. Main Body Text: The curves for the exhaust heated system shew that with the present arrangement the exhaust butterfly valve is necessary to get quick warming up. An arrangement was tried in which the exhaust feed pipe was taken into the exhaust pipe and turned upwards to face into the gas stream. (see sketch). No advantage was gained by this and actually the circulation was slower than with the pipe in its normal position due to no doubt the pressure effect being neutralized by the high gas velocity in the exhaust pipe. contd :- | ||