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).
Testing a washer with holes to reduce water loss from the radiator.
| Identifier | ExFiles\Box 11\3\ 03-page256 | |
| Date | 27th July 1930 | |
| To: Hs.{Lord Ernest Hives - Chair} From G.W.H. Hôtel de France, Châteauroux, Indre. 27/7/30. We have tried the fitting of a washer with 23 .125" holes in the outlet from the cylinder head to the radiator. The fitting of this has made a considerable improvement in reducing the loss of water. We ran 1000 miles with only a loss of 2 pints, the conditions as per our previous test, i.e. by filling the radiator to half way up the body of the thermostat when the temperature is 85°C. It does not however affect in the least the temperature of the water. We boiled consistently during yesterday afternoon's run with a following wind and an average air temperature of 24°C. The loss of water after this run was 4 pints. We may say that we were going to suggest a similar scheme fixed permanently in the outlet pipe inside the radiator top tank, but did not suggest as there is a very possible danger of the holes becoming choked up. Our idea was not to form a back pressure, but to stop splashing, i.e. the idea is a gauze filter that you put on a house tap to prevent splashing. We have not as yet received any news re the new radiator or the silencer for the carburetter. G.W.H. | ||