Determining rotorcraft collective adjustment during ground test
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United States of America Patent
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Aug 11, 2015
Grant Date -
Oct 30, 2014
app pub date -
Jul 7, 2014
filing date -
Jun 6, 2012
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Abstract
A method for evaluating a collective alignment of rotor blades for an aircraft while the aircraft is on the ground is disclosed. The method includes determining an air density altitude, and determining a torque value for each engine of the aircraft, while the aircraft rotor blades are operated at a normal speed and the rotor blades are set to a full down position for ground operations via a collective controller. The method further includes evaluating the collective condition by comparing the torque value to a predetermined flat pitch torque alignment limit for the air density altitude, and providing an indication of the collective condition.
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