Hello Guys , I have one question regarding a vertical
        installation.
        If I isolate the oil circuit with a sump pump and have
        the oil tank separated from the engine.
        Do you think It would create problem for the engine to
        run?

        Thank you

        Frank

        Sustained vertical operation.
        I can't say for sure because I have never seen this done.
        I am also sure the devil is in the details so it depends
        on how well the scavenging system is designed. You would be on
        the bleeding edge. You will probably need a scavenge
        pump to extract the oil from behind the rear main bearing.
        If you don't do this the rear main bearing might overheat.

        The other major problem might be... you may not get oil flowing
   out of
        the lower rotor. The rotor may merely fill up with oil allowing
        no cool oil to flow in. Effective rotor cooling depends on a
        constant flow
        of cool oil. Therefore the oil cooling of the lower rotor
        may not function.

        You won't know all this until you try.
        It would be safer to use a bevel gear box and run the
        engine as Mazda designed it to run.

        In VTOL use vertical operations are used for only a few seconds
   while
        landing and taking off.

        Paul Lamar ...No rotor no motor.


   Paul,

   You've said it at least once before, but I think expecting VTOL to not
   spend much time hovering is unrealistic.  Before I'd consider flying it,
   I'd want to hover the thing for several hours - just to figure out
   how..  And then, people are going to hover taxi from where they start up
   to a safe location from which to depart.  Vertical departures from the
   tie down are going to blow the neighbors around -
   unpopular.  Finally, I
   wonder about the approach method.  Do you expect that a normal approach
   will be flown (with a traffic pattern)?  In what configuration?
   Translation from wing lifting to rotor lifting at low speed close to the
   ground?  The Ospreys transition from forward configuration to vertical
   while still on the downwind - was watching them at Kirtland AFB a couple
   of weeks ago..


   Regards,

   Matt-


   Thanks Matt.

   Testing is another matter. One might have to limit the time one tests
   in the vertical mode to insure the engine does not over heat.

   If it is a heliopad vertical departures from the tie down blowing the
   neighbors around is normal. You can not taxi a skid helicopter with out
   first lifting off.

   I envision a normal high angle of attack approach with a complete
   transition
   to vertical on short final. A modified flare if you will. Previous
   delta wing
   airplanes approached at a high angles of attack anyway. Lacking
   adequate thrust
   and control they could and did get in the back side of the power
   curve mode
   which generally resulted in a crash. Particularly the jet powered
   deltas
   as they had little or no roll control. They had no prop wash over
   the tail.

   We have the thrust and we have the pitch control at angles of attack all
   the way up to 90 degrees. Roll control is provided by both the
   variable thrust vector angles (both lateral and fore and aft)
   and the prop wash over the elevons.

   The V22 Osprey was sold as both a helicopter AND a normal airplane.

   I think that is unrealistic for what I have in mind. Super efficient
   high speed cross country travel with VTOL only. It is not an adequate
   helicopter IMHO.
   --
   Paul Lamar ...No rotor no motor.

Okay Paul,  fair enough..

I'd be interested in seeing a scale model fly.  One without any gyro
help (which the RC helicopters use).


Regards,

Matt-

Perry might be working on one.