weight of displaced air

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i. The total volume swept by pistons during the 180° rotation of a crankshaft of an internal combustion engine. It is the volume between top dead center and bottom dead center of an engine cylinder. Also called a swept volume.
ii. The mass of air displaced by a balloon or an airship. It may also be referred to as the weight of displaced air.
iii. The distance of any point from a standard point.
iv. The separation between a target and an interceptor at any point of time.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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