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).
Overheating Peregrine engine oil, suggesting improvements by referencing American car cooling systems.
| Identifier | ExFiles\Box 87\1\ scan0021 | |
| Date | 17th March 1933 | |
| Sg.{Arthur F. Sidgreaves - MD}.from PN.{Mr Northey} X240. PN{Mr Northey}1/WT17.3.33 Overheating of Engine Oil. Peregrine. --------- Referring to the very interesting and valuable collection of data in Hs{Lord Ernest Hives - Chair}/Rml/KT13.3.33, it is to be anticipated that R.{Sir Henry Royce} may be able to make some constructive proposition with regard to the next move which should be made in cooling Peregrine engine oil. I am surprised not to see some reference to a line of thought which would appear to be well worth while in this connection, and one which I understand is becoming universal American practice, for example the Chrysler and Buick cars have entirely dropped radiator shutters and make use of a thermostatically controlled water circuit, such as we used with the "Silver Ghost", thereby not only enabling the engine to heat itself up very quickly first thing on a cold morning (at which time the main radiator water circuit remains closed), but also the engine room has frequently the advantage of a free current of air flowing through the radiator, or otherwise there might be some restriction. This additional cooling would of course help the crankcase cooling and dynamo as well. Along with this arrangement the Buick have a small external radiator right in the engine-water-circuit through which the engine oil passes and gets heated by the water when starting up from cold, and later on during the engine's running the oil becomes cooled by the water circulated. The removal of radiator shutters again would certainly mean a material reduction of cost. PN.{Mr Northey} | ||