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.