Today's Message Index:
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1. 06:16 AM - Re: slow day on the list (Thom Riddle)
2. 10:00 AM - Re: slow day on the list (Dennis Thate)
3. 10:14 AM - FireFly Broken or Detached Outer Wing Braces. (Jack B. Hart)
4. 06:10 PM - sacrilege? (Dana Hague)
Message 1
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Subject: | Re: slow day on the list |
Great video, Bob. Thanks for posting it.
I don't suppose that Aeronca back then bothered with approving or disapproving
maneuvers like loops or spins :-). Based on the flying I've done with you in
recent years, you appear to have been a bit more adventurous back then. Of course
that was long before cell towers.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Don't accept your dog's admiration as conclusive evidence that you are wonderful.
Ann Landers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=334501#334501
Message 2
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Subject: | Re: slow day on the list |
Thanks for that very fine vintage video. It reminds me of getting up early on Sunday
mornings as a kid skipping church and watching a half hour local TV show
, [ Sherm Booen's World of Aviation ] of mostly flying up to northern Minnesota
to go fishing or a area flight breakfast, with a hand held movie camera .....
technology of that time period.
http://www.pavekmuseum.org/Booen.htm
Thanks for the memories .
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
Faith is believing what you know ain't so - Mark Twain
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=334530#334530
Message 3
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Subject: | FireFly Broken or Detached Outer Wing Braces. |
Kolbers,
>From my flight log:
November 9, 2010 - Removed propeller for cutting to 48 inches. Washed the
FireFly, and while washing heard a noise. Found that both rear outer wing
corner braces have broken.
March 19, 2011 - Cut the wing fabric over the rear diagonal 5/16 inch OD
brace to the main spar. The left brace broke at the cross brace attachment
bracket, The forward end was loose in attachment to the spar tube. The
right brace was not broken but the attachment holes in the brace tube were
torn out and the forward end was free. Both braces show that they were in
high compression in that one cannot move them back into place with out over
lap or, in the case of the space between the attachment end and the spar, a
gap of about 1/8 of an inch.
Most likely cause is that when the fabric was shrunk before painting it put
this brace into severe compression and moved it out of direct/straight
column. This makes the brace very unstable and unable to resist side to
side vibration. As result the bowed brace vibrates and swings around the
direct line between the attachment points. This in turn causes local tube
flexing, and finally, fatigue failure at an attachment point results.
To repair, one must move the spar attachment point from inside to out side
the spar tube. Long rivets should be used to penetrate both walls of the
bracing tube and the spar tube. Also, the same end of the small tube brace
should be filled with JB Weld and the same substance used between the
contact point of the tube. This will prevent the joint from moving, resist
brace torsion and the pulling of the rivets through the tube wall.
To repair the lower end, one can slide a slightly larger tube over the
original tube, fill the gap with JB Weld, and use several pop rivets to
hold it together.
None of this will keep the tube from going into compression on a new build.
But much of the movement and/or vibration about a column can be minimized by
using a tape and/or woven fish line and/or a diagonal metal tube brace from
the end bow to the middle of the suspended brace length and on to the back
side of the main spar.
Jack B. Hart FF004
Winchester, IN
Message 4
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I'm starting to think it might be time to move on from my UltraStar. It's
a great airplane, and I love flying it, but for what I want, it's... limited.
I'd like to take somebody for a ride on occasion. I'd like to be able to
handle grass fields over 6" tall without trashing my prop. I'd like a
plane that's easier to repair if, God forbid, that Cuyuna gets quiet and I
have to put it down in a rough spot and break it (there aren't many spots
here in CT that _aren't_ rough).
The sacrilege part is that (gasp!) I'm thinking of a 2 seat Quicksilver (a
specific one, N numbered, that I've flown before, and can almost certainly
get VERY cheap, from a friend, though it'll need some work). I know the
Kolb is a much better, better flying airplane, with the storage advantages
of folding wings and enclosed trailer... but there are the above drawbacks,
too. I can't afford much of anything else (as I said, I can get the Quick
cheap)... otherwise a different Kolb would be an option, I'd _love_ a
Slingshot... or even a FSII...
So who wants to talk me out of this? Or make an offer for a US with
trailer, before I come to my senses?
-Dana
--
Come to think of it, there already are a million monkeys at a million
typewriters, and the Internet is _NOTHING_ like Shakespeare!
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