Paul,

I'm still looking into the possibility of a vertical installation for a
helicopter.  I would be absolutely elegant if it could be made to work.
What would you think of installing three teflon buttons, one inch diameter,
or larger, near the apex inside the rotor edge seals on what would be the
lower side of the rotors.  Would there be enough oil between the rotor and
the side plate that the buttons would ride on an oil film?  Where are the
thrust bearings on the crankshaft?

Steve Brazil