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Lovely tailwheel

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Paul A. Franz, P.E.

Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

Posted: Mon Jan 19, 2009 5:29 pm Post subject: Lovely tailwheel

On Mon, January 19, 2009 4:42 pm, gary.algate(at)sandvik.com wrote:



some clippage...



 	  Quote: 	
		   OK Gents here are two fotos (before) and after.



 The King Pin is now basically vertical (as on old setup), plane tracks

 beautifully, no shimmy (I couldn't help myself so I played hooky and went

 for a couple of circuits) and it unlatches with a tap of the brake and

 full rudder.


	


The adapter you made to straighten up the king pin angle adds a little length. Is this

increased moment arm going to be alright? That effectively softens the spring rate and

raises the tail slightly.



 	  Quote: 	
		   I'm sure there is more to  this than any one contributing factor and it

 probably also relates to the stance of the plane. (Mine has tube gear).


	


That appears to be the case. I now believe that a vertical king pin is ideal but if

there is a shimmy tendency, putting in a small positive angle will work in your favor.



 	  Quote: 	
		   Thanks to all for your help on this as once again with everyone's help a

 problem has been solved and hopefully others can use the info


	


You certainly did nice work.

-- 

Paul A. Franz

Registration/Aircraft - N14UW/Merlin GT

Engine/Prop - Rotax 914/NSI CAP

Bellevue WA

425.241.1618 Cell

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_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office

gary.algate(at)sandvik.co
Guest

Posted: Mon Jan 19, 2009 6:03 pm Post subject: Lovely tailwheel

The adapter you made to straighten up the king pin angle adds a little length. Is this

 increased moment arm going to be alright? That effectively softens the spring rate and

 raises the tail slightly.

  

The spring rate is definitely softer but that's probably not a  bad thing. 

 

 That appears to be the case. I now believe that a vertical king pin is ideal but if

 there is a shimmy tendency, putting in a small positive angle will work in your favor.

  

If necessary I can put the adaptor  in a press and decrease the angle, but at the moment it appears to be pretty close to optimal for my plane. 

 

 Question to the list - does anybody know where the "chandelier" chain supplied from Kitfox with the kit for the tailwheel drag lines can be sourced. I had to extend mine and am now forced to use a cheap hardware chain as I haven't been able to find a supplier for the original. 

 

Gary 

 



 Paul A. Franz

 

 

 -

 -

          -Matt Dralle, List Admin.

 

 

 

  

 [quote][b]

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akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Mon Jan 19, 2009 7:31 pm Post subject: Re: Lovely tailwheel

Aircraft spruce has the chain.  



http://www.aircraftspruce.com/catalog/lgpages/comp_springs.php



You can order just the chains, but yer gonna pay alot more for shipping than the chain itself.

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_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....

gary.algate(at)sandvik.co
Guest

Posted: Mon Jan 19, 2009 8:17 pm Post subject: Lovely tailwheel

Thanks Leonard

 

 Gary Algate

 

 

 

  [quote][b]

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