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 heated system performance, comparing configurations with and without a butterfly valve for quick warming up.
| Identifier | ExFiles\Box 66a\1\ scan0123 | |
| Date | 8th 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. Text from graph: Y-axis: TEMP °C X-axis: TIME - MINS Plot labels: STD WITH BUTTERFLY CLOSED NO BUTTERFLY HOT SPOT EXHAUSTING INTO THE ATMOSPHERE STD WITH BUTTERFLY OPEN VOL. OF WATER IN HOT SPOT FOR HEATING = 355 C.C. Main 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 :- | ||