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VG Installation/Evolvement of Kolb Design

 
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John Hauck



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

PostPosted: Wed Feb 08, 2006 3:55 pm    Post subject: VG Installation/Evolvement of Kolb Design Reply with quote

If the Kolbs had not advanced beyond the origional model, most of us
be flying something else, the design of the Kolbs must evolve or it
will eventually die.
|
| Michael A. Bigelow

Hi Mike:

The wing shape and dimensions of the Kolb have not changed since the
Ultrastar, 1984 or there abouts.
I don't know about the SS and FF. Somebody who does, help me out.
Not really sure about those two. It is Homer Kolb's airfoil and hard
to beat for the job intended.

The Kolbs have gotten bigger, wider, narrower, longer and shorter,
heavieer, beefed up somewhat, but basically the same old Kolb.

john h


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



Joined: 10 Jan 2006
Posts: 1246

PostPosted: Wed Feb 08, 2006 5:15 pm    Post subject: Re: VG Installation/Evolvement of Kolb Design Reply with quote

Hi John,

I dont really know that much about the history of Kolbs, but they all look like they would be fun to fly. The first one I saw in a picture was a really light plane, with a tiny engine, long legs, but with the strong tube spar wing, and tube to the tail that we see on all Kolbs. Very Happy

The evoloution I am referring to is the differnt models that are now available and the improvements that have been made in each one. The firestar now the firestar II, the MKII now the stronger MKIII, and now the MKIII Xtra. They have done an excellent job of steadily improving things over the years without ruining the design and have managed to stay way ahead of the competition.

Michael A. Bigelow


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"NO FEAR" - If you have no fear you did not go as fast as you could have !!!

Kolb MK-III Xtra, 912-S
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JetPilot



Joined: 10 Jan 2006
Posts: 1246

PostPosted: Wed Feb 08, 2006 5:21 pm    Post subject: Re: VG Installation/Evolvement of Kolb Design Reply with quote

BTW John, there was a thread about 10,000 feet in a Kolb. I was wondering how high you have been with your 912 S. Did the engine start to lose much power, how was its performance way up there. Now that I am about to start flying a 912S im really curious how that engine does at high altitudes.

Michael A. Bigelow


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"NO FEAR" - If you have no fear you did not go as fast as you could have !!!

Kolb MK-III Xtra, 912-S
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n79rt(at)kilocharlie.us
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PostPosted: Wed Feb 08, 2006 5:28 pm    Post subject: VG Installation/Evolvement of Kolb Design Reply with quote

Hi Mike:

The wing shape and dimensions of the Kolb have not changed since the
Ultrastar, 1984 or there abouts.
I don't know about the SS and FF. Somebody who does, help me out.
Not really sure about those two. It is Homer Kolb's airfoil and hard
to beat for the job intended.

The Kolbs have gotten bigger, wider, narrower, longer and shorter,
heavieer, beefed up somewhat, but basically the same old Kolb.

john h

<snip>

Correct Mr. Hauck! EXACT same airfoil on everyone of them...matter of
fact other than the different size hole in the spar mounting plates,
they are the exact same ribs... rib spacing changes from model to model,
but the shape of the rib and the distance from leading edge spar to
trailing edge spar is the same.

For what it's worth, common airfoils are certainly not new...Aside from
the 208 Caravan, the 177 Cardinal, and the 210 every Cessna ever built
used the NACA 2412
airfoil...140,150,170,172,180,185,205,206,L-19,Skymasher... the list
keeps going...

Jeremy


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n79rt(at)kilocharlie.us
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PostPosted: Wed Feb 08, 2006 5:46 pm    Post subject: VG Installation/Evolvement of Kolb Design Reply with quote

every Cessna ever built
used the NACA 2412
airfoil...140,150,170,172,180,185,205,206,L-19,Skymasher... the list
keeps going...

Jeremy
<snip>

Correcting myself...exclude the jets...there different critters
altogether.

Jeremy


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herbgh



Joined: 10 Jan 2006
Posts: 145

PostPosted: Wed Feb 08, 2006 6:12 pm    Post subject: VG Installation/Evolvement of Kolb Design Reply with quote

John

"Homer Kolb says these valleys play an important role in the
performance of his wing. "


I wonder what Homer meant ? I have never seen an analysis of the
Kolb airfoil. Modified Clark Y is all that I see.

Reason that I ask; I am toying with the idea of using .016 aluminum
and foam false ribs back to the main spar(d cell) when I build the new
set of single lift strut wings for my Firefly. I intend to keep the
current set of wings intact just in case. Smile

Has anyone ever done an analysis of this airfoil? I think the
US,Firelfy and Firestar all have the same airfoil? I notice that max
chord is around 24 to 25 %.

The modified airfoil on my N3 pup has its max thickness at 30% or so..
Modified Gottingen 387 I think it is called?

Herb


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