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Thread: Building a Fokker D VII

  1. #181

    Join Date
    Aug 2011
    Location
    Alabama
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    1,957
    Ideally, one would want the arm holding the wheel vertical to the ground as much as possible.

    I guess I'm looking at the mount for the rear support perpendicular to the skid and interpolating the angle, when it's probably going to go forward of that for a steeper angle. I hadn't anticipated the skid coming off of the airplane at a 50 degree angle, which seems pretty aggressive.

    I've had some tail wheel woes and just want to keep you from experiencing the same...
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

  2. #182
    Frank proper tail wheel camber is demonstrated in this sketch. Remember the tail skid flexes, or in my case pivots, which changes the relative camber of the tail wheel pivot. That is why the initial position of the, free camber, set to compensate for the suspension.
    Name:  Fok tail wheel.jpg
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Size:  60.8 KB

  3. #183

    Join Date
    Aug 2011
    Location
    Alabama
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    1,957
    Thanks! I suppose I should have known you'd of sussed it all out.

    And I didn't say that your wheel on the end of the skid is absolutely brilliant in wondering about geometry.
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

  4. #184
    Dangit
    Well that's not gonna work. I have about a 3* to 5* pitch on the spokes and I actually need a 13* to 15*, better I nail that down to an exact angle. Oh the discouragement of a failure in design and effort. I have about 3 weeks work in the wheels at this point. My suspicion is that I will be making new hubs. I guess I had some foresight when I bought 6' of 5" diameter 6061 T 6 aluminum for the hubs.
    Name:  Fok wheel lacing.jpg
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