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N111KX (Kip)
Joined: 27 Jan 2006
Posts: 96
Location: Atlanta, GA
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 Posted: Fri Jul 11, 2008 5:45 pm Post subject: Very Minor Structural Failure |
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During the pre-flight today I ran across this little failure. It's the steel rod that keeps the fabric away from the aileron torque tube. It seems to have broken away from the weld. Also noteworthy is that there is no real stress on mine as my cage is uncovered. You may want to keep an eye on this.
One of the last airframes from old Kolb.
Total time...370 hours
Years since manufacture...10 (8 years flying)
Regards,
Kip
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Kip
Firestar II, N111KX
Waiex, N111YX
Quickie 1, N111QX
Atlanta |
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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| Posted: Fri Jul 11, 2008 7:03 pm Post subject: Re: Very Minor Structural Failure |
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Thanks for the heads up Kip, it is always good to know what problem areas might be so that I can keep an eye on them. It is beyond me as to why that would break there, as you say it looks like its just to keep the fabric formed and away from the tube.
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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icrashrc
Joined: 16 Mar 2006
Posts: 247
Location: Mishawaka, In
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planecrazzzy
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| Posted: Sat Jul 12, 2008 4:20 am Post subject: Re: Very Minor Structural Failure |
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Since it's only for fabric.... Why don't you just take it off....?
I agree with crash....The fabric keeps it from vibrating...
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Gotta Fly...
Mike & Jaz in MN
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PS I noticed you called it "Structual failure"....not so
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N111KX (Kip)
Joined: 27 Jan 2006
Posts: 96
Location: Atlanta, GA
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| Posted: Sat Jul 12, 2008 4:32 am Post subject: Re: Very Minor Structural Failure |
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I could have taken it off long ago but I always wanted the option to cover the cage. I'm getting the Dremel out now...
Kip
PS It's structure that failed or, structural failure.
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Kip
Firestar II, N111KX
Waiex, N111YX
Quickie 1, N111QX
Atlanta |
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planecrazzzy
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| Posted: Sat Jul 12, 2008 5:49 am Post subject: Re: Very Minor Structural Failure |
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If you can just take it off.... Then it's not structural....
More for aerodynamics.
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Gotta Fly...
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Ralph B
Joined: 14 Apr 2007
Posts: 367
Location: Mound Minnesota
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| Posted: Sat Jul 12, 2008 6:24 am Post subject: Re: Very Minor Structural Failure |
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Here's another one to keep an eye on. This happened four years ago (June 04).
Ralph
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Ralph B
Kolb Kolbra 912uls
N20386
550 hours |
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slyck(at)frontiernet.net
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| Posted: Sat Jul 12, 2008 8:04 am Post subject: Very Minor Structural Failure |
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Fatigue cracks.
If they are at a vibration node they will happen eventually.
Here's my not so humble opinion: wire feed welds are stronger,
mostly by virtue of the
high nickel alloy but also more rigid in a narrow band than gas
welding, making them
more susceptible to an earlier crack. A gas weld leaves a softer
condition around the weld
and I try to reduce this a little by sponge-water quenching. Right
after the first hard landing
I may (or may not) notice the weld joint taking a little set. After
that it has reached a happy state
of strength that will endure many more similar impacts with no
further distortion.
BB, 50% gas welded MkIII cage
On 12, Jul 2008, at 10:24 AM, Ralph B wrote:
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N111KX (Kip)
Joined: 27 Jan 2006
Posts: 96
Location: Atlanta, GA
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| Posted: Sat Jul 12, 2008 8:14 am Post subject: Re: Very Minor Structural Failure |
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From the internet so it's true..."structural failure refers to loss of the load-carrying capacity of a component or member within a structure or of the structure itself..."
Now, since you gotta fly and I want to fly, let's fly and keep the thread as a suggestion to others to do a preflight, OK. 
| planecrazzzy wrote: | If you can just take it off.... Then it's not structural....
More for aerodynamics.
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Gotta Fly... |
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Kip
Firestar II, N111KX
Waiex, N111YX
Quickie 1, N111QX
Atlanta |
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