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601XL form blocks joggle and crimp cutouts

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Jugle

Joined: 04 Aug 2007
Posts: 47
Location: Victoria, Australia

Posted: Tue Oct 30, 2007 10:44 pm Post subject: 601XL form blocks joggle and crimp cutouts

Forgive me if I'm getting a bit pedantic here, but I just want to be sure. Where I've notched out the form blocks for the joggle for the spar and for the crimps along the rib edges, do I need to round those edges off like the rest of the block?



I'm concerned that if I bash with a hammer and wooden block to follow those recesses I might get some cracking... or is the bend shallow enough to cope?



What have you done?



Glenn.

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_________________
Glenn Andressen
601XL- Rudder, Stabiliser parts completed, Wing ribs, nose ribs done, 70% Fuselage parts made.

lwinger

Joined: 21 Jun 2006
Posts: 229
Location: Tustin, CA

Posted: Wed Oct 31, 2007 12:40 am Post subject: 601XL form blocks joggle and crimp cutouts

I didn't round them, and didn't have any problem with cracking.  The joggle just isn't that extreme, and you shouldn't need to beat them down with great force.  You should be fine.

  

 Larry Winger

 601XL/Corvair

 Scratch building

 Wings 80% done

  

  

 On 10/30/07, Jugle <glenn(at)eastcoastit.net (glenn(at)eastcoastit.net)> wrote: [quote]--> Zenith-List message posted by: "Jugle" <glenn(at)eastcoastit.net  (glenn(at)eastcoastit.net)>



Forgive me if I'm getting a bit pedantic here, but I just want to be sure. Where I've notched out the form blocks for the joggle for the spar and for the crimps along the rib edges, do I need to round those edges off like the rest of the block? 



I'm concerned that if I bash with a hammer and wooden block to follow those recesses I might get some cracking... or is the bend shallow enough to cope?



What have you done?



Glenn.



-------- 

Glenn Andressen

601XL- just started.





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=142906#142906  [quote][b]

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_________________
Larry Winger
Tustin, CA
Plans building 601XL/650 with Corvair
Installing fuel system
www.mykitlog.com/lwinger

Jugle

Joined: 04 Aug 2007
Posts: 47
Location: Victoria, Australia

Posted: Wed Oct 31, 2007 12:59 am Post subject: Re: 601XL form blocks joggle and crimp cutouts

 	  lwinger wrote: 	
		  I didn't round them, and didn't have any problem with cracking.  The joggle just isn't that extreme, and you shouldn't need to beat them down with great force.  You should be fine.

	


Thanks Larry. 

BTW, I have your kitlog site bookmarked and have already used it several times as a reference. Keep up the good work.



Glenn

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Glenn Andressen
601XL- Rudder, Stabiliser parts completed, Wing ribs, nose ribs done, 70% Fuselage parts made.

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Wed Oct 31, 2007 8:07 am Post subject: Re: 601XL form blocks joggle and crimp cutouts

I actually cracked one and had to remake the part. Be careful.



 	  Jugle wrote: 	
		  Forgive me if I'm getting a bit pedantic here, but I just want to be sure. Where I've notched out the form blocks for the joggle for the spar and for the crimps along the rib edges, do I need to round those edges off like the rest of the block?



I'm concerned that if I bash with a hammer and wooden block to follow those recesses I might get some cracking... or is the bend shallow enough to cope?



What have you done?



Glenn.

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maarten versteeg

Joined: 15 May 2007
Posts: 37
Location: San Antonio

Posted: Wed Oct 31, 2007 2:23 pm Post subject: 601XL form blocks joggle and crimp cutouts

Hello Glenn,



I didn't round off the edges of the joggles and the crimps for

the main spars and didn't have any problems. I used MDF for

the form blocks, so it may have given a little bit, but with

the spring back for the flange I never got too sharp bends on

the crimps.



Regards,

	Maarten

         601XL plans building wings



 	  Quote: 	
		   Time: 11:44:33 PM PST US

 Subject: 601XL form blocks joggle and crimp cutouts

 From: "Jugle" <glenn(at)eastcoastit.net>

 

 

 Forgive me if I'm getting a bit pedantic here, but I just want to be sure. Where

 I've notched out the form blocks for the joggle for the spar and for the crimps

 along the rib edges, do I need to round those edges off like the rest of the

 block?

 

 I'm concerned that if I bash with a hammer and wooden block to follow those recesses

 I might get some cracking... or is the bend shallow enough to cope?

 

 What have you done?

 

 Glenn.

 

 --------

 Glenn Andressen

 601XL- just started.

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_________________
Maarten Versteeg
601XL scratch building wings

Ron Lendon

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

Posted: Wed Oct 31, 2007 2:58 pm Post subject: Re: 601XL form blocks joggle and crimp cutouts

FYI



Here is a little different approach to putting the joggle in the rear wing ribs.  



http://mykitlog.com/users/display_log.php?user=rlendon&project=113&category=0&log=23490&row=231

I didn't soften the crimps either, just ground them into the MDF and tapped em home usng the Mark Townsend method (Metalworking 101 Homebuilt Help).

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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:
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