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.




I wouldn't run the engine vertical. Besides the oiling and cooling problem,
you will have the entire weight of each rotor on the bottom irons. I would
think this would lead to some pretty quick wear.

Bob Mears



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