Item 1170

DESIGN: Dragonfly ~ Rotor - Hub - Assembly w/ Side Arm

Drawing:

Notes:

This will put additional loading on the head and the teetering bearings, but perhaps not too much.

Just make damn sure that high thrust by the blade will not want to twist the rotor head's arm and thereby increase the pitch on the blade.

Consider lowering the tie-bars to reduce the loads on it and on the related bearings. This lengthening of the sidebar will also cause the angle between the tie-bar force and that of the spindle force closer to being the perpendicular.

More Notes:

There are two ways of doing this.
    1. Have the teetering axle splines to the yoke and the drop-arm at the side.
    2. The vertical section of the yoke continues on down past the spindle and at the bottom has an arm extending out to the side, for attachment of the tie-bar.

Slight Problem:

The current design of the tie-bar will not be able to handle the compressive loading. See DESIGN: Dragonfly ~ Rotor - Hub - Tri-Teetering - Tie-Bar. It will need to be modified slightly.

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Initially displayed (& posted on PPRuNe): February 28, 2003 ~ Last Revised: March 11, 2003

The above utility invention is openly and publicly disclosed on the Internet to negate an entity from patenting it, to the exclusion of all others whom may wish to use it. ~ Reference patent law 35 U.S.C. 102 A person shall be entitled to a patent unless - (a) the invention was known ... by others in this country, ..., before the invention thereof by the applicant for patent.