公开(公告)号：US20180290739A1

公开(公告)日：2018-10-11

申请号：US15482616

申请日：2017-04-07

Applicant: Bell Helicopter Textron Inc.

Inventor： Hassan A. Mughal ,  Jared Addison Hallett ,  Andrew Paul Haldeman

IPC: B64C27/45 ,  B64C27/82 ,  F16C23/04

Abstract: In one embodiment, a rotorcraft can include a teetering tail rotor assembly. The teetering tail rotor assembly can include one or more multi-bearing yokes. Each yoke can include three or more spherical bearings evenly spaced apart from each other. The teetering tail rotor assembly can include a tail rotor blade affixed to each yoke arm through the three or more spherical bearings. The physical dimensions of the three-bearing yoke can be 10% smaller than a two bearing yoke that can support an equivalent load. For example, the length of each three bearing yoke can be 28 inches, the thickness can be 0.85 inches, and the width can be 3.250 inches.