The test rotor has four blades assembled from a central laminated flat plate steel hub, to which are joined four radially directed, mutually per-pendicular, bonded steel flexure beams, each supporting a blade approxi-mately 130 inches in span.

Flexures can be incorporated in mechanisms with moving joints as pivots and sliders, enabling rotation and translation without wearing parts or stiction. They are also quite useful in providing semi-kinematic mounts and allowing for relatively large …

Aug 22, 2016 · Specially designed precision washers that align, level and adjust parts in a wide variety of applications. These shims fit the shoulder diameter to shorten screw length. These …

The two leaf flexure is much more prone to parasitic and off axis movement than the four bar flexure but it is far superior to mechanical pivots or hinges and it is compact, simple and inexpensive. As a true flexure it has no friction, stiction or backlash.

A photograph of the model rotor (fig. 3) shows the root end of the blades, the blade root flexures, and the rotor hub. In this picture, the flexural axes are inclined at 360.

Lattice flexure blades While looking for the most appropriate design for flexure blades, CSEM innovated with a lattice structure (patent pending) having the main advantages of: Lowering the bending stiffness while maintaining a sufficient thickness for manufacturing, Avoiding internal support structure thanks to the overhang angle,

associated model improvements. V-22 CAMRAD I1 Model The V-22 rotor is stiff in-plane with. a gimbaled hub and -15 deg pitch-flap coupling (a3). The structure is mostly co. posite, with a coning flexure and blade-fold hinges. The aerodynamic sections start with a 36-in chord at 5% r. dius, linearly tapering to a 22-in chord at the tip. The tape.

This rotary flexure bearing is a monolithic structure with inner and outer hubs connected by unique rotary compound flexure stages.

A flexure is provided for bearingless rotors wherein the effective hinge about which rotor blade flapping and lead lap motion occurs may be located at a point less than eight percent of the...

BO-105 helicopter applies hingeless rotor hub system and blade root uses a flexure of hingeless rotor hub system. So bending stiffness reinforcement for flexure was conducted for preparation of whirl tower test using BO-105 blade.