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Mk III to Xtra Conversion

 
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mdnanwelch7(at)hotmail.co
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PostPosted: Thu Jan 18, 2007 12:21 pm    Post subject: Mk III to Xtra Conversion Reply with quote

Hi Everyone,
I'm new to the list, just signed up yesterday. Not new to Kolb, tho. I
bought a Mk III back in 1999, and I recognize a few familiar names.
I have not finished building my Mk III Classic, yet I am very close. I
got held up from finishing the Mk III and I did not want to cover it until I
could store it inside a hanger. Essentially, about all that's left is the
fabric and paint. But!! I really, really think I want to back the
process up a little, and make a few aerodynamic changes...(like Barnaby
Wainfan suggested) to create what should have been all along...a Mk III
Xtra.
That sucker looks like it's going fast, sitting still. While I have
absolutely no doubt whatsoever about my own talents to making a worthwhile
conversion, I am curious if there are those among you who have considered or
even done this very thing.
I can do the fuselage modifications (mostly just widening the front and a
newer better windshield
design). Of course, I'll have to make a new fiberglass nose, etc. Any
thoughts on the matter?? Thanks, Mike Welch in
Utah (southwest corner...two hour drive from Las Vegas)

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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

PostPosted: Thu Jan 18, 2007 12:52 pm    Post subject: Mk III to Xtra Conversion Reply with quote

| I'm new to the list,

Mike Welch

Hi Mike:

Welcome to the Kolb List.

While I am a happy camper with my old mkIII, there are those on the
List that will welcome discussions on how to make it look faster, etc.

Have never had a chance to fly with a mkIIIx long enough to do any
comparisons between my mkIIIc and the xtra. Looking forward to doing
that comparison, one of these days.

john h
mkIII
hauck's holler, alabama


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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama
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Richard Pike



Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

PostPosted: Thu Jan 18, 2007 2:52 pm    Post subject: Mk III to Xtra Conversion Reply with quote

I would be interested in the implementing mods that involve the fuselage
from the doors back. I understand that the Xtra has a different side profile
that reduces drag, and while it would be good to have the wider nose, it
would also probably help to have the aerodynamic mods from the doors to the
rear of the fuselage that improve drag. Which would be vastly easier to
install.
Plus, I like the front the way it is <grin>

In your case, why not ask TNK to sell you just the front end? Probably
wouldn't break the bank, and save you reinventing the wheel...

Richard Pike
MKIII N420P (420ldPoops)

do not archive

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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

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APilot(at)webtv.net
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PostPosted: Thu Jan 18, 2007 9:34 pm    Post subject: Mk III to Xtra Conversion Reply with quote

The airflow from behind the doors to the prop area is also of interest
to me. An upside down fin similar to what we see on race cars which
they attach to the trunk lid if attached to the rear belly, might bring
air up to the prop. And, maybe some diverters or vortex generators
attached to the rear sides of the fuselage would help. I do know that
my prop gets more air with my half (summer) doors than with my full
coverage winter doors. Someone has mentioned a "V" be installed, but I
cannot visualize it.


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