Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Various points and questions concerning engine water boiling issues.

Identifier  ExFiles\Box 24\4\  Scan077
Date  10th August 1923
  
To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce}
RG.{Mr Rowledge} EP.{G. Eric Platford - Chief Quality Engineer}
CJ. BY
BJ. PN.{Mr Northey}
OY. H.{Arthur M. Hanbury - Head Complaints}
} copies to.

X766

R 6/M10.8.23.

RE. WATER BOILING. X.1751 X.3499
40/50. & GOSHAWK. X.766 X.4240

(1) The fan seems to be the most important feature: to be very efficient it should in all cases be as large as possible even to the last .1 of an inch. It should run reasonably fast but not so fast as to be unreliable and noisy, and destructive to the belt.

(2) The bonnet louvres or shutters should not be abandoned and should be fitted if No.1. fails.

(3) The 40/50 ventilated underguards must be very good and should be retained, and tested if these are as good as No.2. (For clearness always use the term "Bonnet" or "Radiator shutters.)

(4) Mr. Sidney's report is most kind and reasonable, and we ought to know more exactly what are our limitations as to speed and temperature. His suggestion of a thicker radiator i.e. fore and aft, has been tried and not found any advantage, because the air current is reduced, and its temperature increased resulting in making the floorboards hotter.

(5) The gearbox undersheet can (according to Springfield) be be shortened by 17" without disadvantage.

(6) The only alteration to dimensions is to increase the face area preferably in height a slight amount, with increased size of fan ( should be tried.)

(7) Have we thoroughly thrashed out the feature of loss of water by water being thrown out, whereas we ought to only lose water in the form of steam after the first initial quantity?

(8) State how much is due to expansion of water, and how much due to displacement of water by steam in cavities in upper part of cylinders?

(9) On some of the 20 HP. cars we have a thermostat chamber which may help as a separator. Does it? (But no separator can do any good to prevent or reduce (7).)

(10) The principle of separating steam from water is usually a whirl chamber, the water passing away over the edges and the steam coming away at the centre (see sketch.) Has such a scheme been tried?

(11) We should all realise that overheating of the cooling water will always occur under suitable circumstances contd:-
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙