Bywater's hydraulic petrol storage system, as its name implies, is based on the use of water power, and the method adopted is to displace the liquid in storage by water, thus obtaining many advantages, including that of always having storage tanks full of cither water or the liquid in storage, or both in combination, which entirely avoids evaporation. No pumps are used whatever, thus saving power and eliminating all the upkeep costs and diiiiculties connected with pumps working in volatile liquids. Labour cost is reduced to a minimum as the water does all the work. A further important advantage lies in the fact that the liquid delivered is entirely free from water and foreign matter owing to the liquid being forced out of the top of the storage tank instead of being drawn by suction pipe as in the case of pumping and other pressure systems. There being no evaporation, no explosive mixture is generated in the tank, thus avoiding any possibility of fire by explosion.
(1931), "Recent Technical Developments: Petrol Storage—An Engine Starter for Pilots—High‐Speed Magnetos—Uses of Rubber", Aircraft Engineering and Aerospace Technology, Vol. 3 No. 11, pp. 298-298. https://doi.org/10.1108/eb029479
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