公开(公告)号：US20200010183A1

公开(公告)日：2020-01-09

申请号：US16030406

申请日：2018-07-09

Applicant: Bell Helicopter Textron Inc.

Inventor： Amarjit KIZHAKKEPAT ,  Glenn Alan SHIMEK

IPC: B64C27/50 ,  B64C3/56 ,  B64C29/00

Abstract: A method of blade fold for a tiltrotor aircraft includes configuring the tiltrotor aircraft in a flight ready position with a rotor system in an inverted-Y position, unlocking a first rotor blade of the rotor system to permit the first rotor blade to pivot relative to a yoke of the rotor system, restraining the first rotor blade to allow the first rotor blade to pivot relative to the yoke as the yoke is rotated, rotating the rotor system in a first direction so that the first rotor blade pivots closer to a second rotor blade, rotating the rotor system in a second direction to orient the rotor system into a modified inverted-Y position, unlocking a third rotor blade to allow the third rotor blade to pivot relative to the yoke as the yoke is rotated, and rotating the rotor system in the second direction so that the third rotor blade pivots closer to the second rotor blade.