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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).
Radiator tests for a Goshawk-11 engine, comparing small and large radiator performance.

Identifier  ExFiles\Box 29\3\  Scan116
Date  23th August 1923
  
BROOKLANDS - 23rd. Aug. 1923.

RADIATOR TESTS - 6-GOSHAWK-11.

Wednesday. Tests carried out with the small radiator and cowl. Atmospheric conditions hot. No marked improvement was obtained with the cowl. The water boiled freely in every case after about 6 mins. running all out.
Radiator changed Wed. evening.

Thursday. Larger radiator tests with shutters on and off, Undershield off and Bonnet Shutters open. No perceptible improvement was noticed with shutters or undershield off, possibly owing to the varying atmospheric conditions, it being sunny in the early morning and cold and showery during the afternoon. A marked difference was observed with fan belt loose and tight, also increased cooling with bonnet shutters.
It was unfortunate that owing to the difference in the days the two radiators could not be compared directly. One certainly had the impression that the longer tubes gave increased cooling.

Hs{Lord Ernest Hives - Chair}/Rp.
  
  


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