Item 1463

DESIGN: UniCopter ~ Rotor - Hub - ARR - Tension-Torsion Strap

Overview:

To incorporate tension-torsion strap instead of axial bearings too reduce the size and drag of the rotorhub.

Sketch:

 

Notes:

The straps are as long as possible so as to make the pitch change as easy as possible.

The sketch is of a 3-blade rotor. However it could be for a 4-blade rotor, with a single strap tying two blades together.

150 hits on Google for "Tension-Torsion Strap"

 

Look in NASA site as well.

One is http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19890004375_1989004375.pdf

 

Related Information:

See. DESIGN: UniCopter ~ Rotor - Hub - Twinned Blades

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Last Revised: January 15, 2007