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).
Tests on fan positioning for improved cooling efficiency on the 12-EX and its proposed application to standard Phantom cars.
| Identifier | ExFiles\Box 15\1\ Scan032 | |
| Date | 25th April 1927 | |
| To Da.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. EY. X7250 Hs{Lord Ernest Hives - Chair}/Rml/T25.4.27. X766 X7250 We have been carrying out some tests to determine whether the fan when pushed up close to the radiator as on 12-EX has any increased cooling efficiency. We find that we can measure an increase of some 5% at speeds round about 30 m.p.h. We consider that this is a very definite advantage because there appears to be no attendant disadvantages. We suggest that the position of the fan should be altered with the new type radiator with shorter tubes of smaller section. We wondered whether you could give us a scheme which will enable us to put the fan on standard Phantom cars in the same position as on 12-EX. The main modification which must be incorporated before we can do this is the radiator shutter control. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||