Subject: VTOL Canard Xplane update
From: Rotary Engine
Date: 9/9/2007, 10:50 PM
To: AARotary Engine


    > My son bought an Apple notebook, so I can now run Xplane at home.
    > I've got the VTOL canard into tailsitter mode for takeoff.
    > I did program the model for automatic stability below 50 knots,
   so it's
    > like a fly-by-wire computer is keeping the plane stable below
   that speed.
    > Takeoff is virtually hands off and is a beautiful thing to watch from
    > outside the plane. I'm trying to figure out if there is a way to
   capture
    > the screen to a movie.
    > I can land it vertically without crashing but not really at a
   particular
    > spot. In reality that would be handled by the computer and gps
    > coordinates.
    > Landing is best accomplished by holding a nose high attitude of
   about 60
    > to 70 degrees, and twiddling the throttle to control descent rate.
    >
    > Perry
    >
    > Do you have variable prop pitch simulation in there Perry?
    > Can  you change the thrust vector for maneuvering in vertical mode?
    > Does Xplane simulate the prop wash air flow over the control
   surfaces?
    >
    > It is going to be a challenge getting the empty weight down with
    > all that wing area.
    >
    > Paul Lamar

   Right now it's simulated with 400 installed HP, constant speed props at
   1200 RPM, 12 foot props.
   So you are right, weight will have to come down if HP is to come down,
   or the props need to be larger in diameter, or the tip speeds (prop
   RPM)
   increased a little.

   You can put in thrust vectoring but I haven't yet.
   It does simulate the prop wash, which is significant in this mode over
   the canard, unlike the original pusher.

   You should get the program, it's really cheap. x-plane.com
   <http://x-plane.com>

   As I said before, the takeoff is so cool! And with all the HP it climbs
   like a rocket.

   Perry

   I would expect so but the problem with a lot of HP is you
   have to cool it. Just ask Dave Leonard.
   I am squeezing cooling into the delta as we speak.
   --
   Paul Lamar ...No rotor no motor.


I think most recip powered helicopters use cooling fans..


Regards,

Matt-


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