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Arrow-copter. This is my dream-gyro

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  • #16
    I do not know details of this design (nor I can read German). I just noticed on the two photos earlier in the thread (the side one mostly) that air intakes go more up towards the prop (if you can say so) which would mean that in normal flight the nose should be upper to make them level. ... If it is true - then it is not a dramatically HTL.

    Xeneon is also slightly upper TL (it as discussed on the forum) the cabin aerodynamics adds up to total stability picture.

    It might be a similar case.

    A regular gyro would have TL level and the prop thrust adds a bit to the total lift when the nose goes up at the take off, but nobody said It has to be like this.

    I just wonder if I'm right.

    Leonid
    Last edited by Leonid; 05-30-2008, 01:09 PM.

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    • #17
      I found this OLD thread and wonder what these opinions are now of one of the nicest if not the finest examples of the newer gyro's.

      As is now apparent to me form can follow function.

      And really what's wrong with that if it's safe and TRAINING is in place!?;)

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      • #18
        I have a thing about T tails. I built a wind tunnel to test all of the different tail designs for a pusher gyro back in 2008 thinking that a V tail would be great. I was right, although Ernie's cruciform tail is the best, the V tail is a close second, and the original Bensen design with the HS ahead of the VS is unbelievably stable! And I discovered the T tail stinks - it is by far the worst design of all, which tells me that anyone whoever designed a gyro with one did absolutely zero testing of models in a wind tunnel, quite obviously. And if they didn't bother to test aerodynamics of their design, what the hell are they doing designing and selling anything that flies and that my life depends on? Just goes to show you can sell anything so long as you find a sucker to buy it and call it experimental. Major faux pas in my book and a seriously good reason to pass this gyro up. You see, as the prop wash twists and hits the T, this design catches it in one quadrant only and causes major adverse yaw which when coupled with a crosswind can create completely unnecessary control issues. Get a real tail. WIth the Bensen, the HS is ahead of the VS and the wind slips right by without getting trapped and causing problems. Imagine that.
        GT Mills
        Peachstate Rotorcraft Club

        Mohawk Aero Corporation
        PO Box 30133
        Savannah, GA 31410
        www.MohawkAeroCraft.com info@MohawkAeroCraft.com

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        • #19
          I'm in agreement with you Mike about the vast difference between the large forward side surface area with the fuselage and the diminutive surface area the the vertical stabilizer.

          Greg, I do certainly like the size and amount of surface area you have on your tandem Air Command.

          Jerry, I have a story about the toy Arrowcopter. In April of 1968 I was playing with my recently acquired Arrowcopter toy in front of my house when it was caught in a tree. I went into my house to get my football to dislodge the toy when I found my mother sobbing in front of the TV. The announcement just came through that Dr. Martin Luther King had been shot.

          Wayne

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          • #20
            The Arrowcopter has been around for that long ??? I don't think so !
            Happy Flying, Chris S.

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