Architecture of a multiple-engine helicopter propulsion system, and corresponding helicopter
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United States of America Patent
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Sep 8, 2020
Grant Date -
Jun 1, 2017
app pub date -
Mar 20, 2015
filing date -
Mar 27, 2014
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Abstract
An architecture of a propulsion system of a multi-engine helicopter is disclosed, comprising turboshaft engines that are connected to a power transmission gearbox. It comprises: a hybrid turboshaft engine that is capable of operating in at least one standby mode during a stable flight of the helicopter; a pack for quickly restarting said hybrid turboshaft engine in order to bring said engine out of said standby mode and to reach a nominal operating mode; an auxiliary power unit that is connected to said electrotechnical restart pack by means of a first AC/DC converter and is capable of providing said restart pack, on demand, with power required for bringing said hybrid turboshaft engine out of said standby mode.
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