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601XL outboard spar and long range tanks

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dgardea(at)gmail.com

Joined: 26 Mar 2007
Posts: 50
Location: Indianapolis, IN

Posted: Mon May 14, 2007 11:14 am Post subject: 601XL outboard spar and long range tanks

I recently picked up the wing kit at ZAC along with the long range tanks. Having completed the ailerons and flaps, I'm now moving onto the wings. Glad to be back building again as my job had put a major delay in the project for the past year. I see that the standard pre-built 601XL wing spar comes with a nose rib angle at 1490 from the root for nose rib #4. This will interfere with the back of the long range tank. I have seen a couple posts that say ZAC says this angle should be cut off .. as opposed to removed. Any advice on the best way to cut it off? I was thinking of using my dremel with a rotary wheel with scrap underneath to protect the spar. I have been unable to contact ZAC yet as their line has been busy most of the day. Any advice or previous experience on this is appreciated.



Thanks,



Dave Gardea

601XL - Corvair - tail done, working on wings

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CH650 - Corvair - flying!
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Michael Valentine

Joined: 09 Jan 2006
Posts: 108

Posted: Mon May 14, 2007 11:29 am Post subject: 601XL outboard spar and long range tanks

I cut mine as close as possible with snips and then filed.  I also added 2 ribs where the hat stiffener is - around 1700mm - at the end of the tank.  I think this is required if you go this route.



Michael in NH



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On 5/14/07, dgardea(at)gmail.com <dgardea(at)gmail.com (dgardea(at)gmail.com)> wrote:[quote] --> Zenith-List message posted by: "dgardea(at)gmail.com" <dgardea(at)gmail.com (dgardea(at)gmail.com)>



I recently picked up the wing kit at ZAC along with the long range tanks. Having completed the ailerons and flaps, I'm now moving onto the wings. Glad to be back building again as my job had put a major delay in the project for the past year. I see that the standard pre-built 601XL wing spar comes with a nose rib angle at 1490 from the root for nose rib #4. This will interfere with the back of the long range tank. I have seen a couple posts that say ZAC says this angle should be cut off .. as opposed to removed. Any advice on the best way to cut it off? I was thinking of using my dremel with a rotary wheel with scrap underneath to protect the spar. I have been unable to contact ZAC yet as their line has been busy most of the day. Any advice or previous experience on this is appreciated. 



Thanks,



Dave Gardea

601XL - Corvair - tail done, working on wings



--------

Dave Gardea

601XL - Corvair

working on wings





Read this topic online here:



  [quote][b]

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Mon May 14, 2007 11:31 am Post subject: Re: 601XL outboard spar and long range tanks

Cut it with anything that does not damage the underlying spar.   You can even use snips although the material is a little thick and at an awkward angle.  I scored mine with a cutting wheel and then grabbed it at both ends with a couple of pairs of pliers and snapped it off.  I took a file to the edge to dress it.



Tim

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Zodiac XL - Jabiru 3300A
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dredmoody(at)cox.net
Guest

Posted: Mon May 14, 2007 12:24 pm Post subject: 601XL outboard spar and long range tanks

The angle can be scored deeply with an OLFA knife then simply broken off at the score line. A little bit of filing/sanding smooth and you're ready to move on.



Dred



---- "dgardea(at)gmail.com" <dgardea(at)gmail.com> wrote: 

 	  Quote: 	
		   

 

 I recently picked up the wing kit at ZAC along with the long range tanks. Having completed the ailerons and flaps, I'm now moving onto the wings. Glad to be back building again as my job had put a major delay in the project for the past year. I see that the standard pre-built 601XL wing spar comes with a nose rib angle at 1490 from the root for nose rib #4. This will interfere with the back of the long range tank. I have seen a couple posts that say ZAC says this angle should be cut off .. as opposed to removed. Any advice on the best way to cut it off? I was thinking of using my dremel with a rotary wheel with scrap underneath to protect the spar. I have been unable to contact ZAC yet as their line has been busy most of the day. Any advice or previous experience on this is appreciated.

 

 Thanks,

 

 Dave Gardea

 601XL - Corvair - tail done, working on wings

 

 --------

 Dave Gardea

 601XL - Corvair

 working on wings

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=112783#112783

dgardea(at)gmail.com

Joined: 26 Mar 2007
Posts: 50
Location: Indianapolis, IN

Posted: Mon May 14, 2007 1:06 pm Post subject: Re: 601XL outboard spar and long range tanks

Thanks for the quick replies, guys. I appreciate the help and advice.



Regards,



Dave



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CH650 - Corvair - flying!
http://n631dg.t15.org/home.html

PatrickW

Joined: 27 Oct 2006
Posts: 380
Location: Fort Worth, Texas

Posted: Mon May 14, 2007 7:11 pm Post subject: Re: 601XL outboard spar and long range tanks

 	  Michael Valentine wrote: 	
		  I also added 2 ribs where the hat stiffener is - around 1700mm - at the end of the tank.  I think this is required if you go this route. 	




Where did you find that information...?  



I'm just now finishing one wing, and don't recall seeing any requirement for 2 more ribs.  I *think* I have the most recent drawings.



I'd sure hate to button this thing up missing a couple of wing ribs...



Thanks,



Patrick

601XL/Corvair

Michael Valentine

Joined: 09 Jan 2006
Posts: 108

Posted: Tue May 15, 2007 7:42 am Post subject: 601XL outboard spar and long range tanks

Patrick - I did not have the most recent designs on this one.  My spar was built for 12 gallon tanks with 4 nose ribs inboard of the tank, two just outboard, another space for a 12 gallon tank, then three more ribs outboard of the second space.  When I spoke with the factory about changing the spar to accomodate the longer 15 gallon tank, they said I should put 2 nose ribs outboard of the tank.  There was already a hat stiffener in that location - easy to install two ribs right there. 



Michael in NH



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On 5/14/07, PatrickW <pwhoyt(at)yahoo.com (pwhoyt(at)yahoo.com)> wrote:[quote] --> Zenith-List message posted by: "PatrickW" <pwhoyt(at)yahoo.com (pwhoyt(at)yahoo.com)>

Michael Valentine wrote:

 	  Quote: 	
		   I also added 2 ribs where the hat stiffener is - around 1700mm - at the end of the tank.  I think this is required if you go this route. 


	




Where did you find that information...?



I'm just now finishing one wing, and don't recall seeing any requirement for 2 more ribs.  I *think* I have the most recent drawings.



I'd sure hate to button this thing up missing a couple of wing ribs... 



Thanks,



Patrick

601XL/Corvair





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=112869#112869  [quote][b]

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Tue May 15, 2007 8:30 am Post subject: Re: 601XL outboard spar and long range tanks

When you install the 15 gallon tanks you move the rib from the position of the L that you cut off to another flange outboard of the tank.  You still have 7 Nose Ribs - 3 inbd of the tank and 4 outboard.



See pix.



Tim

NoseRibs2.jpg

Description:

Nose ribs - XL Seen from wing root

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32.61 KB

Viewed:

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Almost done! It'll fly in spring!

dgardea(at)gmail.com

Joined: 26 Mar 2007
Posts: 50
Location: Indianapolis, IN

Posted: Tue May 15, 2007 8:48 am Post subject: Re: 601XL outboard spar and long range tanks

Tim,



So I will need to add a new nose rib "L" for the relocated nose rib #4? Thanks for the pic. What is the new position for the relocated nose rib #4? I could not find any reference to this in plans or assy docs, i.e., modifications of the spar/nose rib attachment points to support the long range tanks. (Maybe I did not look hard enough)



Thanks,



Dave

_________________
Dave Gardea
CH650 - Corvair - flying!
http://n631dg.t15.org/home.html

PatrickW

Joined: 27 Oct 2006
Posts: 380
Location: Fort Worth, Texas

Posted: Tue May 15, 2007 8:52 am Post subject: Re: 601XL outboard spar and long range tanks

 	  Tim Juhl wrote: 	
		  See pix.Tim 	




Gotcha.  Thanks.  I'm ok.



It sure is nice to have this forum to correspond with others who are doing the same thing.



Patrick

601XL/Corvair

dgardea(at)gmail.com

Joined: 26 Mar 2007
Posts: 50
Location: Indianapolis, IN

Posted: Tue May 15, 2007 8:56 am Post subject: Re: 601XL outboard spar and long range tanks

Pls disregard the last post .. I found the location, just the other side of the hat stiffener, on the drawing at 1750 from the spar root for the relocated nose rib #4 to support the long range tank.



Thanks for the help again, guys.



Dave Gardea



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_________________
Dave Gardea
CH650 - Corvair - flying!
http://n631dg.t15.org/home.html

Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Tue May 15, 2007 9:19 am Post subject: Re: 601XL outboard spar and long range tanks

For what it is worth - I had to add additional cork to the ends of the fuel tank to get a snug fit using the ZAC rib locations.   IMPORTANT - Fitting the tank is difficult with both the #3 & 4 ribs riveted in place.  In my case I didn't rivet NR4 until the tank was installed because my capacitance type fuel sender was installed on that end.  If you used the standard float type you might want to hold off on riveting NR 3 until everything is fitted and the tank installed.  I also had to build up some cork around the filler hole (about 5/16") to make a snug fit without pushing the skin down around the neck.  See pix.



If your filler neck turns in with any difficulty at all you might want to get on the list for the "big tap" loaned out by ZAC.   On one of my tanks when I hand screwed the neck in and left it for a couple of days I couldn't get it back out.  The threads crossed and locked and I had to destroy the neck to remove it.  If you want more info do a search of Fuel Filler Neck Woes.



Tim

fillHole.jpg

Description:

Cork sheet used to support skin around fuel filler hole - glued together with contact adhesive.

Filesize:

48.53 KB

Viewed:

388 Time(s)

_________________
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Almost done! It'll fly in spring!

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