Av8r3400

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About Av8r3400

  • Rank
    Advanced Member
  • Birthday 01/31/1971

Profile Information

  • Gender Male
  • Location North Central Wisconsin

Av8r3400's Activity

  1. Av8r3400 added a post in a topic MATCO Tail wheel shimmy   

  2. Av8r3400 added a post in a topic MATCO Tail wheel shimmy   

    These are good points, Chris and I don't doubt your experience.  Damping and mass of the wheel itself are certainly factors to consider.
    However, every single time I have encountered tail wheel shimmy on my plane and others, it was directly caused by (and solved by) adjusting the caster angle of the pivot axis.  My plane was shimmying badly during my trip out west.  The steel spring had sagged and was making for a negative caster angle.  On that trip I purchased a used Grove aluminum spring.  After installing the spring, all shimmy went away and as you can see, it has a positive caster angle.  During the spring installation I disassembled the entire assembly to check for wear and anything else I could find.  All was good and the swivel action is very free and loose.  The chains also have some slack in them.  No shimmy at all.
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  3. Av8r3400 added a post in a topic MATCO Tail wheel shimmy   


     
    This photo has been around for a long time, but shows well the "Pivot Axis" everyone is talking about.
     
     
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  4. Av8r3400 added a post in a topic ROTEC prop for kitfox 4   

    I have a 78x48" Prince on my model IV.  I think Mike Kraus has a Prince on his Rotec.  I don't know what size it is...
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  5. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    My exhaust is a Kitfox factory system.  It doesn't use ball and socket joints, that is the major flaw in it's design in my opinion.
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  6. Av8r3400 added a post in a topic Hard starting...and the cure!   

    I actually run mine at .021-.022" gap for the same reason.
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  7. Av8r3400 added a post in a topic Converting to a 912   

    I like the addition of the stabilizer tube for the stinger.
     
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  8. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    Very nice looking setup, Randy.  (...and Leni!)
    Is that a Rotax muffler-can or custom as well?
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  9. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    Paul - Is that Dallas' plane?
     
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  10. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    If the 7SS system had proper ball joints, I'd buy one today and modify my FWF to make it fit.  That design is prone to breaks as well.  I am convinced it's the sleeve joints.
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  11. Av8r3400 added a topic in Avidfoxflyers General Hangar   

    I spy...
    I got a flier for Bruce's Custom Covers and guess whose Suber Avid is on the cover along with another nice looking Kitfox(?)...
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  12. Av8r3400 added a post in a topic Replacement of Jesus Bolts on Fuselage Wing Strut   

    I would think the number of fold, unfolding cycles would have to be astronomical for there to be a problem.  Like the elevator horn bolt on an Avid, this might be something to be inspected every so often if you fold on a regular basis.
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  13. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    I have that system shown in the box, installed on my plane now.  I hope it lasts.  My next step will be to replace the slip/sleeve joints on the muffler with proper ball and socket joints to allow for some movement.  I believe this is the major problem area.  It is where my first plane cracked (as well as around the stinger) and where my last system on the plane cracked prior to the stinger failure.  If you look at the cracked muffler you can see the major reinforcement pieces around the slip joints.  This misaligned the sleeves enough that assembling the system went from a real pain to almost impossible.
    IMO, this exhaust system is a poor design from Kitfox with many area that could be improved.
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  14. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    Yes, you can still get an exhaust through Kitfox for a model IV.  There are a couple variations, though.  They deal with the angle of the stinger exit. 
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  15. Av8r3400 added a post in a topic 11/30/2018 Alaska Earthquake   

    I texted with Leni earlier, he's fine...
     
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