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).
Engine cooling modifications and performance in warm weather, involving the India Office.
| Identifier | Morton\M5\ img042 | |
| Date | 1st December 1921 | |
| contd. -2- 5. Slowing down the water circulation. 6. Fitting an auxiliary water tank. 7. Fitting a simple exhaust pipe to a single silencer at the rear. (With the object of opening out the air space and cooling the engine room a little). 8. Cowling the Fan. Mr. Hives reported that there is a slight plenum of air under the bonnet with the car stationary and the fan running at a fair speed, but the effect of opening bonnet doors to relieve this pressure is very slight. Speeding up the circulation and cowling the fan both had adverse effects. Finally it was decided that the quickest, cheapest and likely to be the most efficacious proposal, would be to increase the radiator as much as the space available would allow. The high finish now put on radiators would not be required. The radiators taken off the cars would be good stock. We then went to the India Office and found Majors - Lewin and Fraser not really dissatisfied with the car, and prepared, if we would say the rise in temperature was all right, to settle the matter at that. But we were not prepared to say the car would not boil under any circumstances, in view of what we know has happened abroad and does happen in England in warm weather. Major Lewin and Fraser were a little vague as to what would be considered all right, but it was evident they did not expect the car to boil under any reasonable condition, or at any rate, not to lose any water owing to the difficulty of contd. | ||