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).
Methods for carburettor throttle heating using super-heated water or steam to avoid a valve in the exhaust.
| Identifier | WestWitteringFiles\P\July1926-September1926\ Scan009 | |
| Date | 5th July 1926 | |
| R.R. 285A (100 T) (S.H. 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 TO HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} "CC TO BJ. BI. " " PN.{Mr Northey} GWD. ORIGINAL re. CARBURATION - THROTTLE HEATING. OBJECT: TO AVOID VALVE IN EXHAUST. R1/M5.7.26. X6080 X8230 We understand you are testing out for both engines the use of super heated water or steam. The boiler was to have a restricted entrance of about .025 guarded with 1" gauze of 100 meshes per inch. We do not mind if the water turns to steam in the boiler; in fact, that is what we would like, so that the slower the circulation the quicker will the water be hot, and the higher its temperature. An alternative system that I should like you to try is to use the water sealed up in a chamber fitted with a safety valve. The quantity of water would be small, say .1 lb. For constructing the boiler a sleeve should be fitted over the exhaust pipe having a difference in diameter of about .062. This should be welded on to the pipe and a connection should be welded near the top for the outgoing steam pipe say of .5 or less dia. which should be inclined upwards all the way to the carburetter jacket, and enter the jacket at the bottom. The system is fitted with a small safety valve to blow off at say 100 lbs. per sq. in. so that the water will be evaporated down to the right amount. The carburetter jacket which it is desired to heat should have ample capacity and must be strong enough to bear the pressure decided on. R.{Sir Henry Royce} | ||