System and method of operating multi-engine system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11939914
APP PUB NO 20230175436A1
SERIAL NO

17540576

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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There is described a method of operating a multi-engine system of an helicopter. The multi-engine system has a first turboshaft engine having a first shaft, a second turboshaft engine having a second shaft, a gearbox having a clutch system, and a range of rotation speeds defined as a placarded zone. The method generally has rotating the first shaft at a flight rotation speed when clutched and rotating the second shaft at a first idle rotation speed when unclutched, the first idle rotation speed above the placarded zone; decreasing a rotation speed of the first shaft from the flight rotation speed to a given rotation speed within the placarded zone; decreasing a rotation speed of the second shaft to the given rotation speed; clutching the second shaft; and decreasing the rotation speeds of the first and second shafts to a second idle rotation speed below the placarded zone.

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Patent Owner(s)

Patent OwnerAddress
PRATT & WHITNEY CANADA CORP1000 MARIE VICTORIN LONGUEUIL QUÉBEC J4G 1A1

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beauchesne-Martel, Philippe Brossard, CA 45 182
Coutu, Daniel Longueuil, CA 18 19
De, Lussy Gaetan Montréal, CA 3 0
Hebert, Jeremie Napierville, CA 10 8

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