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rear wing spars

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zenith-list(at)steensland
Guest

Posted: Mon Apr 28, 2008 10:48 am Post subject: rear wing spars

Looking ahead a little, I was wondering how scratch builders are bending 

their rear wing spars?  Most of the D-I-Y brakes I've seen are all 8' 

and the spar is a full 12'.



Are people extending their brakes to bend a full 12' or are they farming 

out those few bends.

-- 

Lee Steensland

601XL/Corvair (7637L reserved) Kit/Scratch builder 0.01% complete!

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amyvega2005(at)earthlink.
Guest

Posted: Mon Apr 28, 2008 11:50 am Post subject: rear wing spars

there are instructions on how to connect two pieces to make one rear wing spar.

You can get them from Seb or Roger Heintz.



Juan



--

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sky_ranger161

Joined: 07 Jun 2006
Posts: 91

Posted: Mon Apr 28, 2008 12:08 pm Post subject: rear wing spars

Hey Lee,

   

  I can't speak for everyone, but I made the rear spar splice that's been approved by Chris Heintz. This allows you to bend the rear spar in two 6-foot sections. In my mind, it's actually an improvement because it provides a doubler at a place where you've cut a big hole in the rear spar for the aileron control rod. You can the get hand-drawn version on Mark Townsend's 601 site:

   

  http://www.ch601.org/resources/rear%20spar/601xl_rear_spar_splice.htm

   

  or another builder, Randy Bryant drew it up a little more legibly at:

   

  http://www.n344rb.com/plans/RearChannelSplice.pdf

   

  You can visit my Kitlog site to see it built. There are more pics than this one - this is just the  first one I could find:

   

  http://www.mykitlog.com/users/display_log.php?user=debo&project=132&category=1384&log=32988&row=94

   

  Hope this helps.

   

   

   

  Debo Cox

  Nags Head, NC

  www.mykitlog.com/debo

  Making fuselage parts

 [quote][b]

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leinad

Joined: 19 Sep 2006
Posts: 283
Location: Central Virginia

Posted: Mon Apr 28, 2008 3:31 pm Post subject: Re: rear wing spars

Lee,

A see a few others have posted the splice 2 pieces method.  I can't say what's best, but I made all my long bends, including the rear spar, the rear longerons and others by bending the metal over a board.  I've prepared a 3/4" piece of oak that is 12 foot long with an edge that is cut back about 30 degrees, then rounded to the desired radius.  I clamp the metal between this board (on the bottom) and another 2/4 on top to my work bench.  I then bend the metal over, at first by hand, then using a soft rubber mallet.  I go a little bit at a time until the bend is formed.  There are pictures in the Wings section on my web sight of the rear spars. 

http:\\daniel.dempseyfamily.us

By the way, this is basically the same edge treatment I used on all my forming blocks.   Anyway that's how I did it.

Dan

601XL plans builder.  (fuselage complete) 

 	  Quote: 	
		  "zenith-list(at)steensland"]Looking ahead a little, I was wondering how scratch builders are bending 

their rear wing spars?  Most of the D-I-Y brakes I've seen are all 8' 

and the spar is a full 12'.



Are people extending their brakes to bend a full 12' or are they farming 

out those few bends.

-- 

Lee Steensland

601XL/Corvair (7637L reserved) Kit/Scratch builder 0.01% complete!

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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_________________
Scratch building XL with Corvair Engine

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Mon Apr 28, 2008 7:07 pm Post subject: Re: rear wing spars

I bent mine in a press brake but could only get them 90 degrees so I setup a fixture on the table top to tweak the flanges and hold the size between bends.



see it here:



http://mykitlog.com/users/display_log.php?user=rlendon&project=113&category=1683&log=24458&row=192



You can also bend it by hand as Dan suggests just go slow, bend a little at a time the whole length.

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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

cj.tremblay(at)videotron.
Guest

Posted: Mon Apr 28, 2008 7:21 pm Post subject: rear wing spars

Lee, go on my web site 



http://www.zodiac640.com/



On this specific page below, you will see how I do this kind of bending for

my tail wing spar ( 9 feet x .040 in 6061-T6). The spar is around 3 meter

long. Special bending technique required to bend with increment of 10

degrees, on a left and right alternance bending.



http://www.zodiac640.com/tail.htm



I do also other bendings for my wing spars (12 feet long for uper and lower

angle in .032 in 6061-T6) with my 8 feet brake.



Good visit. Ask me questions if you have those after visit.



A+ 



Christian Tremblay

CH640 Plan builder

 



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n1269k

Joined: 23 Jan 2009
Posts: 8

Posted: Sat Nov 21, 2009 5:24 am Post subject: Re: rear wing spars

Does anyone know how the two piece rear wing spar will be affected by the new safety upgrades?

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