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nickc(at)mtaonline.net
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 Posted: Fri Jan 23, 2009 10:52 am Post subject: Structural additions to wing? Power for a Kolbra? |
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Hello Kolber’s,
I have seem a handful of pictures on the web of builders adding, additional, structural support members to the Kolb wing.
I have no current plans to add any structure when I start to build my basic “three leading edge wing” similar to the mark lll classic. I will be extending the wing ends and adding droop tips, but we have already cover that subject. Does anyone think there is something I Should add to the wings structure? If so why?
Are there any Kolbra pilots out there…I am wondering about power requirements for the Kolbra. I seen to remember John H saying something about John W not being happy till he had a 912?
Thanks as always,
Nick Cassara
Palmer, Alaska 15 degrees NE winds to 30kt
[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Jan 23, 2009 11:08 am Post subject: Structural additions to wing? Power for a Kolbra? |
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Nick:
Make that a 912ULS.
John W started out with a direct drive Jabiru, never got off the ground with a Verner, then went to the Rotax 912ULS. Somewhere along the line he sold the 912ULS and mounted a used 912UL. Flew it one time, took it off and sold it. Picked up the phone, found a new 912ULS and bought it. John W was once again happy. 
Rotax 912's are expensive, but you get an engine you can depend on. In your part of the world, which I have had the opportunity to fly several times with both a 912UL and a 912ULS, I wouldn't fly with anything else on a Kolb. I fly for enjoyment. Not being able to depend on my power plant would take a lot of enjoyment out of my flying.
john h
mkIII - 67F and the wind is gusting to 20 mph. So much for flying today...
[quote]
Are there any Kolbra pilots out there…I am wondering about power requirements for the Kolbra. I seen to remember John H saying something about John W not being happy till he had a 912?
Thanks as always,
Nick Cassara
Palmer, Alaska 15 degrees NE winds to 30kt
[b]
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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| Posted: Fri Jan 23, 2009 12:27 pm Post subject: Re: Structural additions to wing? Power for a Kolbra? |
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John Hauck gave me a lot of good advice when I was building my Kolb, including some mods to make it a stronger. I have John Hauck's Rib strengthening in my MK III Xtra wings, and I think its a great idea. They add a lot of strength with very little weight. Even with many years of turbulence, and flying in all kinds of conditions, I will have peace of mind knowing that my wings are stronger than they need to be, and that structurally, they will probably outlast me  I also have and like John's elevator and tail gussets.
I am sure there are a couple things that John H has done that I don't remember off hand... John H's Kolb has flown more than 2000 hours, and in some very exciting conditions from the stories I hear ! If anyone has a good idea on what you can do to strengthen a Kolb Structure or make it last longer, John H would be the guy to ask !
Mike
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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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Ralph B
Joined: 14 Apr 2007
Posts: 367
Location: Mound Minnesota
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| Posted: Fri Jan 23, 2009 5:05 pm Post subject: Re: Structural additions to wing? Power for a Kolbra? |
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My Kolbra has an early 912 80-hp engine and it seems to do fine with a passenger. If it had a 912 100-hp, it would cruise faster, but burn more fuel too.
Ralph
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Ralph B
Kolb Kolbra 912uls
N20386
550 hours |
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blackbird
Joined: 10 Jan 2006
Posts: 51
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| Posted: Sat Jan 24, 2009 5:48 am Post subject: Structural additions to wing? Power for a Kolbra? |
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Ok guys,
Still lurking in here....Still working on Kolbra #004.......using a 582 blue head ... I know that John H. and John W. were very close.........
I had the opportunity to speak with John H. on several occasions at the sun-n-fun flyins over the years........He told me that the 582 will fly the Kolbra fine.........but, he used a Jabiru first (my original choice)....but was not happy with the performance of the engine on the airframe.......He went with the 912S because, his words were , using a larger prop due to gearbox means more push and less rpms.........aka going places affordably.......LOL.......We laughed about it and he did all of the research.......
One of these days , John H. , I will get to meet you ........I fly out of the Briar Patch (9 GA1) which is 5 minutes from the house...
Wayne McCullough
[quote][b]
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Wish I lived in the American REPUBLIC!!! |
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sat Jan 24, 2009 7:08 am Post subject: Structural additions to wing? Power for a Kolbra? |
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Wayne:
Hope to be at Sun and Fun in April.
Briar Patch looks like the perfect airport. Its over there near my old stomping grounds, Hunter Army Airfield. I did my instrument and advance rotary wing training there. John W and I both went through the AH-1G Cobra Transition at Cobra Hall on Hunter. That's been 40 years ago.
Got to fly a little yesterday. MKIII and 912ULS performed great. Made me feel good. I had not forgotten how to do it.
I now have 303.0 hours on the engine and 2,871.5 hours on the airframe. Anybody got any more time than that on a Kolb? I haven't flown 10 hours since I got back from the Kolb Homecoming last September. I think I will make up for it come Sun and Fun and the annual flight to Monument Valley and other parts West... Might even break 3,000 hours.
john h
mkIII - Watching the rain drops fall.
[quote] I fly out of the Briar Patch (9 GA1) which is 5 minutes from the house...
Wayne McCullough
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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