dry sump (lubrication) system
- An engine lubrication system in which the lubricating oil is carried in an external tank and not internally in a sump. The sump is kept relatively free from oil by scavenging pumps, which return the oil to the tank after cooling. The opposite of a wet sump system. The pumping capacity of scavenge pumps is higher than that of the engine-driven pumps supplying oil to the system.
Aviation dictionary. 2014.
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