MONITOR SYSTEM FOR MONITORING THE STARTING OF A ROTARY WING AIRCRAFT, AN AIRCRAFT, AND A METHOD USING THE SYSTEM
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United States of America Patent
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Issued Date -
Jul 17, 2014
app pub date -
Jan 15, 2014
filing date -
Jan 16, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of starting a turboshaft engine (5) of an aircraft (1), said aircraft (1) being provided with a rotary wing, said aircraft (1) having a freewheel (15) interposed in a drive train (10) between said engine (5) and a rotor (2) of said rotary wing (1), said engine (5) comprising a gas generator (6) and a free turbine (9), the drive train (10) including an upstream portion (11) connecting said free turbine (9) to said freewheel (15), the method comprising the following steps: measuring the torque (Tq) exerted on said upstream portion (11), and measuring a speed of rotation (Ng) of said gas generator (6); comparing said torque (Tq) with a torque threshold (Stq) and comparing said speed of rotation (Ng) with a speed threshold (Sng); and stopping said engine (5) when said torque (Tq) is less than the torque threshold (Stq) and when said speed of rotation (Ng) is greater than the speed threshold (Sng).
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