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).
Radiator water loss due to vehicle pitching and proposed solutions including baffling steam pipes.
| Identifier | ExFiles\Box 11\3\ 03-page245 | |
| Date | 22th July 1930 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}S/MJ.22.7.30.Contd. We find that if the car is run on the smooth road where no "Pitching" takes place, very little water is lost by splashing but as soon as the car starts to "Pitch" plenty of water is lost when the car is run with the radiator cap off. If you cut one of the steam pipes off short and connect it by means of rubber tubes to a receptacle you should be able to find out exactly how much water is lost when the car is driven at say - 75° C. top water temperature with the level up to the steam pipes at this temperature the car being driven as far as possible to avoid "pitching". If the results shew that the majority of the loss is due to splashing we think that a great deal of it can be prevented by baffling the entrance to the steam pipes, and suggest that you carry out experiments to see how this can best be done. We agree that there is insufficient reserve of water over the matrix since now the loss of two pints less water will cause the tubes to be visible. We hope it will be found possible to increase the capacity of this top tank by fitting the extension under the bonnet. The attached sketch is our idea of how the trouble might be overcome by design, the tube from the radiator cap having holes drilled in at the correct water level so that the radiator cannot be overfilled, an air seal being formed as on the Bijur tank. This same tank would act as an effective | ||