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).
Cooling performance issues and radiator modifications for the Phantom II car.
| Identifier | ExFiles\Box 24\5\ Scan327 | |
| Date | 9th September 1930 | |
| To R.{Sir Henry Royce} From Hs.{Lord Ernest Hives - Chair} c. to SE. Wor.{Arthur Wormald - General Works Manager} c. to M.{Mr Moon / Mr Moore} Da.{Bernard Day - Chassis Design} c. to HY.{Tom Haldenby - Plant Engineer} 8766 Hs.{Lord Ernest Hives - Chair} 2/MJ. 9. 9. 30. x766 x7250. PHANTOM - COOLING. Recent tests which have been carried out show the Phantom ll cooling is not now as good as on the original cars. It will be remembered that soon after we had despatched a few Phantom ll cars we got into very serious trouble with radiators becoming stopped up. It was a very serious position because when it occurred the car was rendered useless. We stopped making any more of the standard radiators with the 6 m/m.{Mr Moon / Mr Moore} x 7 m/m tubes and changed to 5 1/2 m/m by 7 m/m.{Mr Moon / Mr Moore} When this modification was made it was recognised that we should be about 3° C. worse for cooling. We made about 150 cars with the 5 1/2 m/m x 7 m/m and the point was then raised that we had on hand £1,000 worth of radiator tubes of the 6 m/m x 7 m/m which could be made into 6 m/m x 7 1/2 m/m so that we should have the same gap as the 5 1/2 m/m x 7 m/m.{Mr Moon / Mr Moore} A test was made and the results obtained shewed no appreciable difference in the cooling. We have, however, gone carefully over the results again and on the average we are 3° C. hotter with the 6 m/m x 7 1/2 m/m compared with the 5 1/2 m/m x 7 m/m tubes. These two modifications added together mean that at average temperatures we are 5° C. hotter on the present car | ||