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).
Experiments and suggestions regarding heating throttles for the Phantom engine.
| Identifier | ExFiles\Box 66a\1\ scan0105 | |
| Date | 19th February 1926 | |
| Hs.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} LE CANADELHenry Royce's French residence. To E.{Mr Elliott - Chief Engineer} } BY.{R.W. Bailey - Chief Engineer} } c. to CJ. BJ. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} X8080 R1/M19.2.26. X8230 X.8080 X.8520 X.8070 PHANTOM - HEATING THROTTLES. I have suggested superheating the water by boiler on exhaust pipe because the valve in the exhaust pipe is such a difficult piece to keep right, and it may have some effect on slow running and the regularity of the exhaust noises. Altogether I came to the conclusion that the valve in the exhaust is not practical. It was also doubted whether the very hot throttle at full loads, and in hot weather, was good. The experiments carried out by Hs.{Lord Ernest Hives - Chair} (Mr. Lovesey) shew that the extra heat and the rapid heating of our present standard is very desirable, but two points are not clear - (1) can we do without the valve, and (2) is the very hot throttle good in very hot weather, say in India? Tests shew the superheated water to be better than simple water heated, both in time and temperature (certain fears are expressed but these can be avoided or made unimportant.) The following appears possible. (1) An extremely small amount of water is allowed to flow and this should boil, making steam which should condense, and the water cooled again before leaving the jacket. (2) The boiler and jacket should be hermetically sealed with the right quantity of water to make steam up to 3 or 4 atmospheres with small safety valve. The boiler would have to be below jacket so as to allow water to drain back. (3) I have asked if heat supplied to the ingoing air can take the place of heat at the throttle, partly or entirely - (I think not). (4) Can we make an induction pipe which is less dependent upon heat and will do with water only? (5) Can we modify the carb. so as to give an emulsion fog which is less dependent on heat and pipe form? Mr. Lovesey's very able and leng-thy report clears up a good many points but I think he should still stick to the subject, trying out both schemes toafinish of the ideas suggested. In the superheated scheme a small hole say of .025 dia. contd :- | ||