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jindoguy(at)gmail.com
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 Posted: Wed Jan 17, 2007 4:10 pm Post subject: Second thoughts on welding Kolb structure |
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Like several of you, I rejected the idea of welding some of the structure of the Kolb. I thought about the heat treat and deformation issues and kicked my brain into cruise control on reflex.
Somewhat later, after banging my head, again, on the fuselage weldment of the Cumulus that hangs from the ceiling of the garage, it occured to me that the empennage components could be welded 4130 just as well as riveted aluminum. The cumulus tail feathers are welded, not a pop rivet in sight. Even the hinges are welded to the structures.
Of course there's the issue of weight. On reflex, again, it seems like the steel structure might be a close second, but surely could not be as light as aluminum. But, I've been wrong before.
So, in the spirit of "one good test beats a thousand well reasoned opinions", is there anyone out there who has the tailfeathers for his Kolb done, but not covered? I'm not sure model would make that much difference, but to be as close as possible, a Fire Star or a FS 2 are very similar in area of the tail feathers of the Cumulus. If you're near central Kansas, I can bring scales to do the weighing.
Rick
--
Rick Girard
"Ya'll drop on in"
takes on a whole new meaning
when you live at the airport. [quote][b]
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possums(at)bellsouth.net
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| Posted: Wed Jan 17, 2007 7:03 pm Post subject: Second thoughts on welding Kolb structure |
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So, in the spirit of "one good test beats a thousand well reasoned
opinions", is there anyone out there who has the tailfeathers for
his Kolb done, but not covered? I'm not sure model would make that
much difference, but to be as close as possible, a Fire Star or a FS
2 are very similar in area of the tail feathers of the Cumulus. If
you're near central Kansas, I can bring scales to do the weighing.
Rick
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Just some different "mods" we've done on the tail -
down south in Possum country.
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biglar
Joined: 14 Jan 2006
Posts: 457
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| Posted: Wed Jan 17, 2007 7:23 pm Post subject: Second thoughts on welding Kolb structure |
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Good ideas, and perty nice workmanship, Possum. How has it all worked out
in practise ?? Do not Archive.
Larry Bourne
Santa Fe, NM
www.gogittum.com
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Larry Bourne
Palm Springs, CA
Building Kolb Mk IIIC
"Vamoose" |
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possums(at)bellsouth.net
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| Posted: Wed Jan 17, 2007 9:55 pm Post subject: Second thoughts on welding Kolb structure |
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At 11:22 PM 1/17/2007, you wrote:
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Good ideas, and perty nice workmanship, Possum. How has it all
worked out in practise ?? Do not Archive.
Larry Bourne
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OK so far - but you never know?
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MKIIIX040
Joined: 31 Mar 2006
Posts: 123
Location: Millinocket, Maine
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| Posted: Thu Jan 18, 2007 5:57 am Post subject: Second thoughts on welding Kolb structure |
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I like the toe in you've added to the rudder.
Vic
[quote][b]
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MKIIIX040
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