Today's Message Index:
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1. 06:45 AM - Re: Out of square / accident history (mikeperkins)
2. 09:05 AM - Re: Out of square / accident history (kerrjohna@comcast.net)
3. 04:56 PM - Re: Out of square / accident history (Lowell Fitt)
Message 1
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| Subject: | Re: Out of square / accident history |
This is a very good idea. However, some of the models have offset thrust centerlines.
Ground-looping seems to be hardest on the landing gear, so tracking should
be checked.
Some airframe damage will be obvious by looking for skin wrinkles or a tube that's
not quite straight. But if the owner has attempted to cover up things, then
they might only be visible to an A/P or someone who's previously built a fabric
airplane. A weak point in the early models is the truss between the landing
gear, just beneath the front of the seat - cracks and breaks are not uncommon
after a bone-jarring landing. The wings, with their wood-to-aluminum bonding,
should also be looked at carefully for adhesive separation between the ribs
and spars. Also, cracked stinger ribs (that support the flaperons) are not uncommon.
Horizontal and vertical tail should be checked for squareness with the
airframe. Poor fuel system installation has also caused vapor lock, especially
where builders (or subsequent owners) have run the fuel lines uphill or have
sharp bends. Corrosion in the lift-strut tubes. . . .
So many things really. Good to get an A/P or another Kitfox builder to look it
over for you.
--------
Mike Perkins
Havana, Illinois
Model I, 532, B gearbox, GSC prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442379#442379
Message 2
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| Subject: | Re: Out of square / accident history |
I'm wondering what you will find or how you will interpret the findings.=C2
- Shortly after completing my classic 19 years ago it was left overnight
at a nearby airport.=C2- The people at the FBO had been somewhat sceptica
l aboutf homebuilts and a little out spoken.=C2- When I went back the sai
d they owed an apology.=C2- They had measured the plane ever which way as
you have suggested and the largest variance was 1/8 inch.=C2- "None of t
he certified planes on this field are rigged that close."=C2- This would
suggest you don't know what you have unless you know what you started with.
=C2- Rippled fabric might be a clue but often can be reshrunk.=C2- If t
he measurements are way out of whack look further.
=C2-
John Kerr
----- Original Message -----
From: "TURBO T" <turbot@shaw.ca>
Sent: Tuesday, May 19, 2015 9:37:33 PM
Subject: Kitfox-List: Out of square / accident history
Good day
=C2-
A lot of kitfoxes seem to get ground looped at one time or another,=C2- I
am guessing this may twist the frame out of whack a bit.
=C2-
If inspecting a KF for purchase , is it worth while to check the distance f
rom centerline to wingtips front & back ?
=C2-
Maybe compare spinner to wingtip distances side to side=C2-=C2-=C2- &
=C2-=C2-=C2- =C2-tail to wingtip distances ?
=C2-
=C2-
=C2-
=C2-thanks
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Message 3
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| Subject: | Re: Out of square / accident history |
I helped a guy fix his Lite2 twice after ground loops - the second time
with pretty significant damage. From what I saw, the best way to check
for landing induced damage would be to remove the seat pan and inspect
the tubing below each door and extending forward and aft for a foot or
so. It shouldn't be hard to recognize welded repairs by comparing one
side to the other and repairs that were done by straightening tubing
should be evident as it is almost impossible to straighten without
having some minor distortions here and there. One other guy told me
that his hard landing resulted in binding at the aileron bellcrank at
the bungee bulkhead. I would check that area for evidence of scraping.
Mentioning the bungee bulkhead reminded me that some who had hard
landings that took the bungees to the limits of the limit cables saw
damage to the bulkhead from the impact of the cables.
Lowell Fitt
Model IV-1200
From: kerrjohna@comcast.net
Sent: Wednesday, May 20, 2015 9:04 AM
Subject: Re: Kitfox-List: Out of square / accident history
I'm wondering what you will find or how you will interpret the findings.
Shortly after completing my classic 19 years ago it was left overnight
at a nearby airport. The people at the FBO had been somewhat sceptical
aboutf homebuilts and a little out spoken. When I went back the said
they owed an apology. They had measured the plane ever which way as you
have suggested and the largest variance was 1/8 inch. "None of the
certified planes on this field are rigged that close." This would
suggest you don't know what you have unless you know what you started
with. Rippled fabric might be a clue but often can be reshrunk. If the
measurements are way out of whack look further.
John Kerr
-------------------------------------------------------------------------
-------
From: "TURBO T" <turbot@shaw.ca>
Sent: Tuesday, May 19, 2015 9:37:33 PM
Subject: Kitfox-List: Out of square / accident history
Good day
A lot of kitfoxes seem to get ground looped at one time or another, I
am guessing this may twist the frame out of whack a bit.
If inspecting a KF for purchase , is it worth while to check the
distance from centerline to wingtips front & back ?
Maybe compare spinner to wingtip distances side to side & tail to
wingtip distances ?
thanks
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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3D
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