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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).
Superheated water hot spot system for a Phantom engine.

Identifier  WestWitteringFiles\O\2January1926-March1926\  Scan81
Date  12th February 1926
  
Expl: Report.
Expl: No.
Ref. Hs{Lord Ernest Hives - Chair}/ACL/LB12.2.26.

To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL.
c. to CJ. BJ.
c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer}
c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer}
c. to OY. Wor.{Arthur Wormald - General Works Manager}

X8080
X8230

EXPERIMENTS WITH SUPERHEATED HOT SPOT ON PHANTOM ENGINE.

The following experiments were made with the object of exploring the possibilities of the proposed system of a water heated hot spot in which the temperature of the water supplied to it is raised above the jacket temperature by passing through a boiler on the exhaust pipe. A diagram is given which shows how we arranged the apparatus for our tests.

Further tests carried out were with the standard exhaust heated system and the simple water hot spot where the water was obtained direct from the cylinder head without passing through a preheater, in order to furnish data which could be used for the comparison of the merits of the above three systems.

A very desirable feature - in fact the most desirable providing the hot spot is satisfactory under normal working conditions - is that it should possess the quality of rapidly attaining its normal working temperature when starting from cold. The advantage we should expect the proposed system to possess over the simple hot water jacketed throttle would be increased rate of heating from cold, consequently a strict bases of comparison of the three systems would be a record of the increase in the rate of heat supplied to the charge, but several difficulties in the way prevent us using this method. Another method which suggests itself is recording the temperature rise of the hot spot itself but this proved to be unreliable due contd:-
  
  


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