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nickc(at)mtaonline.net
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 Posted: Tue Sep 08, 2015 3:09 pm Post subject: Caulking Tube ends...? |
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Hello All,
On the Kolb U-Tube building instructions they seal the rib ends with some type of caulking. Why?
Thanks,
Nick Cassara
Palmer, Alaska
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Tue Sep 08, 2015 3:36 pm Post subject: Caulking Tube ends...? |
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Hi Nick:
Being at the Rock House I finally have reliable WIFI for the
first time in two months.
BTW, Kolbers, passing through Palmer, Alaska, a few weeks
ago, I got to meet Nick Cassara at the airport. He is doing
a fine job of rejuvenating and modifying the original Kolb
Kolbra, New Kolb Aircraft's prototype. Wish Nell and I
could have spent more time with Nick.
While passing south through Mesa, Washington, Nell and I
spent the day with Andy and Sheila Slinkard. Andy is an old
home builder and recently completed an HKS powered FS II.
Got to take a real close look at the FS and Andy's work. He
is a real craftsman.
Reference caulking rib tube ends, I have never seen this in
any Kolb manual. I, personally, would not want to plug
them. I see no reason to. Down side might be a good place
to trap moisture/condensation. I don't recommend doing
that.
Good to be back in the Lower 48.
Another BTW. The annual Rock House Kolb Flyin will be the
end of the week, starting this Friday. Just because it is a
Kolb Flyin doesn't make it a Kolb only flyin. All aircraft
and Kolb enthusiasts are welcome. This is the 11th Annual
Rock House Kolb Flyin. Actually, the first was on the
Alvord Desert in 2005. Larry and Karen Cottrell, two dogs,
a cat, a parakeet, a Peregrine Falcon, a Kolb FS, and a
motor home, were waiting for me (MKIII), John Williamson
(Kolbra), and Gary Haley (MKIII), at a set of GPS
coordinates right where they were supposed to be. The three
of us flew up to the Alvord after the Unplanned/Unorganized
Kolb Flyin, Monument Valley, Utah. Some great memories from
these experiences.
john h
mkIII
Rock House, 7 miles south of Burns Junction, Oregon
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Ducati SS
Joined: 15 Oct 2009
Posts: 93
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| Posted: Wed Sep 09, 2015 1:43 am Post subject: Re: Caulking Tube ends...? |
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Because the rib ends are open to the inside of the wing after covering I suspect there is some concern that debris created during fabric riveting or later repair will find there way inside the wing. Any debris would likely, due to flexing and vibration find its way between the structure and fabric. I guess each builder would have to decide which is the bigger risk, moisture or debris. Perhaps covering the ends with something porous such as fine nylon mesh would work.
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Sep 09, 2015 6:45 am Post subject: Caulking Tube ends...? |
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I use high pressure air to blow out pop rivet mandrel ends
and drill chips. This usually cleans them up pretty good.
I remember the first wings I built I did not do that. Ended
up with this debris wondering around loose inside the wing.
john h
mkIII
Rock House, OR
--
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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