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).
Investigation into the cause of water loss from a new radiator on the 25-EX model.
| Identifier | ExFiles\Box 11\3\ 03-page244 | |
| Date | 22th July 1930 | |
| X7941d X7250 G.W.Hancock, Hotel De France, Chateauroux, Indre, FRANCE. to GWH.{George W. Hancock - Head Chateauroux} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.22.7.30. LOSS OF WATER FROM 25-EX. We have been conducting some tests here to find out why water is lost from the new radiator. We find that the loss by expansion, if the radiator is filled up to half way up the over flow pipe, is no greater than previously. The reason for this is that the position of the over flow pipe relative to the top of the radiator has not been altered. We find, however, that the radiator tubes become visible on the new radiator when two pints less water has been lost than on the old one. The reason for this of course is the reserve of water carried out over the top of the tubes in the new radiator is less than the old one by this amount. We find that by expansion only up to 95°C. we only lose just over a pint of water and therefore the rest must be accounted for by splashing or by variation in the level of the top water tank when the engine speed varies. We should like you to confirm the amount lost by expansion up to 95°C. on your car and then to confirm whether the rest is lost due to variation in water level by engine speed, or by splashing down the steam pipes. | ||