Today's Message Index:
----------------------
1. 04:56 AM - tie rods vs cables (Douwe Blumberg)
2. 05:44 AM - thermals in a Piet (Michael D Cuy)
3. 08:22 AM - Re: T-88 (Carbarvo@aol.com)
4. 09:01 AM - Re: tie rods vs cables (Barry Davis)
5. 03:12 PM - Re: T-88 (VAHOWDY@aol.com)
6. 05:20 PM - Wing construction question for UK builders (Peter W Johnson)
Message 1
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| Subject: | tie rods vs cables |
Hi guys,
The guy who started my project made up tie rods for to .brace the center section
and landing gear (straight axle) instead of cables. By are beautiful and I'd
like to leave them but I was wondering if anyone knew the strenth factor versus
swaged cables because these end in threaded clevis fittings. I know rods
are used all the time as flying wires etc, but these are eight inch and I was
wondering if threaded ends like that could be a weak link. Like I said, the workmanship
is beautiful and the fittings are aircraft fittings.
Also, when building up my shoulder harness support structure, does anyone know
how many G's one should be trying to stop from flying forward?
Thanks!
Douwe
Message 2
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| Subject: | thermals in a Piet |
<002b01c43313$dba6e680$0600a8c0@laptop>
--> Pietenpol-List message posted by: Michael D Cuy <Michael.D.Cuy@grc.nasa.gov>
Chuck G. is right on about telling what his ride is going to be like by
what color the fields are ahead of him. It is so true. Sometimes my
biggest challenge is to keep the Piet at a given altitude. If you get
caught in a good one you'll be going up at such a great rate that you have
to throttle back and point the nose down just to keep level. On the other
hand there are the sink holes where you have to climb just to maintain
alt. It's pretty annoying since it also is generally accompanied by
turbulence biggie-sized.
Mike C.
Message 3
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James...When you get to the point where you're mixing up larger batches of
the T-88, you might want to consider getting a pair of LARGE (I mean MOLY-SIZED
- 60cc) hypodermic syringes ..The kind with graduations on the side. I put
resin in one and catalyst in the other. Seals are good enough that I don't have
a
problem with oozing. I keep the two of them in a little rack I built of wood,
with the business ends pointing up. This makes for neat and accurate
metering...Carl Vought/Huntsville, AL
Message 4
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| Subject: | Re: tie rods vs cables |
When we were deciding on our anti drag wires, our engineer type said,"Well lets
see...6" tall wing x 14' long @ 100 mph, hummmm" than we worked out a formual
on paper then said" it is like someone pushing backward on the leading edge of
the wing at the tip at around 65 pounds of pressure. Looks like your wires will
hold about 2000 pounds....kinda overbuilt ain't it"
So we decided that after the big crash people will stand and say "man, that
plane sure is totaled, but those drag wires look brand new.."
Bottom line is, both solid and cable wires are used everyday with excellent
results. The choice is up to you. The important thing is to keep building.
barry
----- Original Message -----
From: Douwe Blumberg
To: pietenpolgroup
Sent: Thursday, May 06, 2004 8:01 AM
Subject: Pietenpol-List: tie rods vs cables
Hi guys,
The guy who started my project made up tie rods for to .brace the center section
and landing gear (straight axle) instead of cables. By are beautiful and
I'd like to leave them but I was wondering if anyone knew the strenth factor versus
swaged cables because these end in threaded clevis fittings. I know rods
are used all the time as flying wires etc, but these are eight inch and I was
wondering if threaded ends like that could be a weak link. Like I said, the
workmanship is beautiful and the fittings are aircraft fittings.
Also, when building up my shoulder harness support structure, does anyone know
how many G's one should be trying to stop from flying forward?
Thanks!
Douwe
Message 5
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James,
I think that using t-88 below 70 Degrees is a bad practice. I had a cold
workshop and found that t-88 can lay on the surface and not penatrate to the
pores of the wood. Some test pieces would seperate at the joint with only a
small (10%) amout of wood torn from the opposite piece. I think the manfacturer
recommends thinning for good wetting on some woods.
Howdy
Message 6
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| Subject: | Wing construction question for UK builders |
--> Pietenpol-List message posted by: "Peter W Johnson" <vk3eka@bigpond.net.au>
Hi Guys,
I am about ready to cover the front of the wing with 1/16th ply as noted in
Jim Wills plans. How are the fitting nuts/bolts attached? Are they welded to
the fitting or are inspection holes left in the ply for access to the
fittings?
Many thanks
Peter.
Wonthaggi, Australia
http://www.cpc-world.com
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