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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).
Thermostat-related overheating problems in the 40/50 HP model and proposing tests.

Identifier  ExFiles\Box 24\4\  Scan273
Date  12th November 1924
  
COPY.

To BJ. from Sg.{Arthur F. Sidgreaves - MD}

Sg{Arthur F. Sidgreaves - MD}2/EM12.11.24.

Re Thermostat on 40/50 HP.

You will recollect that at the last Derby Conference when we were discussing overheating troubles, I mentioned that a spanish customer had told me that his overheating troubles had disappeared when he removed his thermostatic control valve and that they re-appeared when he fitted it back.

W. did not (if I remember correctly) appear to attach much importance to this, but I think it is worthy of mention, that within the last week, we have received two orders for 40/50 h.p. chassis from overseas clients who particularly specify that they do not want the thermostatic control and mention that the reason for it being required is on account of overheating troubles.

I would suggest that if W. have not already done so, arrangements be made for them to carry out a definite test with and without the thermostat under exactly similar conditions - and as winter is now with us, it would presumably have to be done on the test bench.

(Sd.) Sg.{Arthur F. Sidgreaves - MD}
  
  


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