hunting hinge

alpha hinge

alpha hinge
The hinge at the root of a helicopter rotor blade with its axis perpendicular to the plane of rotation. It allows the blade tip to move back and forth in its plane of rotation. Movement about the alpha hinge is called drag. Drag dampers oppose this movement. Also called a lead-lag hinge or a hunting hinge.

lead-lag hinge

lead-lag hingeclick for a larger image
The hinge at the root of a helicopter rotor blade with its axis perpendicular to the plane of rotation. It allows the blade tip to move back and forth in its plane of rotation. Movement about the lead-lag is called drag. Drag dampers oppose this movement. Also called an alpha hinge or a hunting hinge.
References in periodicals archive ?
In addition to the huge practical benefits for humans - providing food, and keeping herd numbers in check - hunting hinges on intangibles we all face in different forms.