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Drogue parachute
A drogue parachute is a parachute designed to be deployed from a rapidly moving object in order to slow the object, to provide control and stability, or as a pilot parachute to deploy a larger parachute. It was invented by Giovanni Agusta in 1911.
==Design and operational characteristics==
A drogue parachute is more elongated and has a far smaller area than a conventional parachute and therefore provides less drag. This means that a drogue parachute cannot slow an object as much as a conventional parachute, but it can be deployed at speeds at which conventional parachutes would be torn apart.〔(【引用サイトリンク】url=http://www.nasm.si.edu/events/apollo11/reliveapollo11/glossary.cfm )〕
The drogue parachute's simpler design allows for easier deployment. Where a conventional parachute could get caught in itself while unfolding or fail to inflate properly (thus not slowing the falling object as much as it should), the drogue parachute will inflate more easily and more reliably to generate the expected amount of drag.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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