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 specifications and potential modifications for the Peregrine model.
| Identifier | ExFiles\Box 2\7\ B002_X 140 to 143-page05 | |
| Date | 13th March 1933 | |
| X140. E.{Mr Elliott - Chief Engineer} from He/Lid.{A. J. Lidsey} c. to Ds. c. to EV.{Ivan Evernden - coachwork} He/Lid.{A. J. Lidsey}6/KT.13.3.33. RADIATORS - PEREGRINE. X425L On 3.Per.II chassis we have fitted a 38 mm. Marston Mark III matrix. The cooling on this car is super-efficient with an air temperature of 11°C, the maximum obtainable top water temperature (with shutters propped fully open) is 55°C. Thus under very high air temperatures the water temperature will still be under 90°C. The matrix thickness is the smallest we can obtain. We expect on this car to use eventually the Harrison Vee matrix which is 15% more efficient than the Marston Mark III. To use this with the present radiator dimensions will of course produce ridiculously low water temperatures. Since we cannot reduce the matrix thickness further, the only alternative if we are to take advantage of the opportunity to decrease weight and cost is to reduce the frontal area by cutting off 3" from the bottom of the matrix. The overall external dimensions of the present radiator will of course be retained so as not to alter the appearance. We cannot see any reason why this procedure cannot be adopted, and if you are in agreement will you please let us have a suitable scheme to try out experimentally. He/Lid.{A. J. Lidsey} | ||