Av8r3400

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Everything posted by Av8r3400

  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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  16. Av8r3400 added a post in a topic Rotax 582 engine failure. Can you solve the mystery?   

    If you look closely at the video, you can see the plane was in a stall with the yoke all the way back when it hit the runway.  The failure to fly the plane was as soon as power was being lost the pilot did not push the nose down.  MAYBE then, there would have been enough energy to flair, maybe.
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  17. Av8r3400 added a post in a topic Kitfox IV 912 exhaust   

    in the box. 

    In its normal state (broken):
     

     
     
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  18. Av8r3400 added a post in a topic New Dash   

    For me, I wanted "notches" of flaps instead of the infinitely adjustable system that came from the factory.   A personal preference.
    I further modified my plane with an elevator trim tab to eliminate trimming with the flapperons.
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  19. Av8r3400 added a post in a topic You Said It Can’t Be Done, But Here It Is!   

    2 7G tanks.  Much less than optimal.  Pass.
     
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  20. Av8r3400 added a post in a topic New Dash   

  21. Av8r3400 added a post in a topic Stretching the AVID   

    Jim, what are you looking for specifically?  I can get what ever photos you want.  I'm working with Dave on another project currently and will be right next to "Sputzy".
     

     
     
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  22. Av8r3400 added a post in a topic You Said It Can’t Be Done, But Here It Is!   

    No photos.  I'll take it with a grain of salt.  The Mangy Fox had an advertised empty weight of 575#.  There was that much dirt in the damn thing!  With the BRS and all the other BS in it, it wasn't even close to that.  Now she's a portly, but happy 702# empty.
    I have a good friend who built his Kitfox IV-1050 very, very light and was conscious of every ounce.  He started with a 582 near the 500# mark and after he converted to a 912UL his empty weight was 585#.  Maybe it can be done lighter than that, but I haven't seen it personally.
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  23. Av8r3400 added a post in a topic Stretching the AVID   

    Moving the seat will be near impossible.  Extending and lowering the footwell is a far better option.
    This "C" model Avid fuselage belongs to a friend of mine who did the stretch and lowered and stretched the footwell like you want to do.

     
    What ever you do, be sure to factor in the 300 pounds that engine will weigh.  Your gross will still only be 950 (?) that the "C" model airframe was designed to...
     
     
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  24. Av8r3400 added a post in a topic Rotax 912 ULS Tuned Intake   

    I did the 105 hp Zipper.  Very happy, easy install. 
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  25. Av8r3400 added a post in a topic Grove gear coming what wheels and brakes do I need?   

    I have Grove wheels and their double puck brakes.  They work awesome with either my 21x800-6 or 26" Airstreaks.
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