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Installing wing tanks in 601XL?

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a.s.elliott(at)cox.net
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Posted: Sun Jul 22, 2007 9:22 am Post subject: Installing wing tanks in 601XL?

I have a QB 601XL kit with the 15 gal tanks.  I was wondering how many  layers of cork people use to install the tanks and how the layers are laid out  on the tank.  The plans and photo guides are not consistent nor complete in  this regard.

  

 Also, the tanks I got have about a 20x30mm rectangular boss for the  drain valve, that extends 6-7 mm from the tank bottom.  Am I supposed to  cut a (fairly large) matching hole for this in the bottom skin, or float the  tanks far enough above the skin and only cut a hole for the valve?

  

 Thanks,

 Andy Elliott, Mesa, AZ

N601GE (reserved)

601XL/TD/QB, Corvair,  building...

   [quote][b]

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sperry50(at)comcast.net
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Posted: Sun Jul 22, 2007 10:18 am Post subject: Installing wing tanks in 601XL?

Andy,  

I put one layer of cork strips on the tanks in such a way that the tank would not be making metal to metal contact with the skins. I put it over all of the surfaces and it seems to work OK like that for me.  

As for the tanks, they must be building them different now. My tanks have a round boss for the drain and the bottom skin had already been cut with an appropriate sized hole. After the tank is in place the boss extends just barely through the hole on mine.  

Skip Perry – 601XL   

DO NOT ARCHIVE

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Afterfxllc(at)aol.com
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Posted: Sun Jul 22, 2007 10:19 am Post subject: Installing wing tanks in 601XL?

You will need to place the cork around the welds so the welds wont hit the  skin it depends on the clearance of the ribs on the sides as to how many strips  of cork you put on the sides of the tank. As far as the drain valve you will  more than likely have to make the hole the same size as the boss but wait until  you are sure the tank is where it will be when the LE is closed otherwise you  will be off center and have to make a larger hole for it. I put a total of 4  strips on top of the tank and closed the LE to make sure they were just touching  the skin. some places may have more than others. Around the fuel filler I had to  add a extra piece of cork so the skin wouldn't crush and made a firm seat for  the flange.

  

 Hope this helps

  

 Jeff



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amyvega2005(at)earthlink.
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Posted: Tue Jul 24, 2007 8:36 am Post subject: Installing wing tanks in 601XL?

you put cork until it is a snug fit but do not over stuff, or wing skill will bulg when riveting and not only is it unattractive(like a fat lady in a mini skirt) but it streses the skin.  A little goes a long way.



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