Tie downs

[Ted Waltman]

Thanks for your comments Ben. I recently saw some pictures of pretty
severe damage to the ailerons on a Moose that, while tied down, didn't
have the controls locked in place.

I've walked around Oshkosh for a number of years and continue to marvel
at how cavalier some--a lot--of folks are about tying their expensive
planes down. Wouldn't take much wind at all to move them around.

Ted

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
bransom@dcsol.com
Sent: Friday, May 13, 2005 6:06 PM
To: rebel-builders@dcsol.com
Subject: Re: Ted's Alaska trip, tools and spare parts


One of the things that I appreciated seeing from Ted's site is the
fly-ties
tiedown kit. Having lost an ultralight to tie-down break away I'm
pretty
wary of winds coming up while parked -- I know wing loading helps but I
shake
my head seeing how planes are sometimes left.

Any pro-con comments to off-airport tie-down methods such as the
fly-ties? I
would think too, that if possible you want the plane parked tail into
the
wind (controls locked in neutral position) and a fly-tie set on the tail
as
well. And btw, Ted, thanks for the web site -- look forward to "wasting"
more
valuable build time myself as your trip gets going!!
-Ben



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[Ron Shannon]

Like several others, I didn't like MAM's 5/16" tie down eye bolts
because they're full threaded and the eye is small. I decided to use a
D-ring eye nut, as Wayne and others have suggested. Don't recall if
these sources have been posted before or not, but thought I'd pass them on:

I found cast 316 stainless lifting eye nuts at Bo'sun Supplies (see
http://tinyurl.com/3e2v6m). I chose the 5/16" for the monster 780 lbs.
load rating and because I'd already drilled one strut hole to 5/16" for
the MAM tie down bolts. The 1/4" eye nut's 460 lbs. working load rating
is probably more than sufficient.

The eye nuts are coarse threaded, so I got 5/16-18 818 stainless bolts
from boltdepot.com (see http://tinyurl.com/2lyekk). The 2.5" long bolts
(Product #148) were just about 2 threads too long, extending into the
eye a little too much, so I ground off about 2 threads. Unlike the MAM
bolts, these have a non-threaded shank.

I assembled them with a stainless flat washer and a stainless split-ring
lock washer under the eye nut, and some Loctite. Photos are at
http://tinyurl.com/34facz and http://tinyurl.com/32cdp7, and on the
Rebel Builders site, in Files, Rebel, Misc.

Ron
254R








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[Gary Gustafson]

Tiedowns are dependent on soil type. Claws do not seem to work very well

here in Florida and screw types seem to be better. Both types do not work

well in wet soil. Screw type harder to get in ground in rocky soil. The
video

provides a good explaination.



Here is a tie-down comparison:

http://www.mcp.com.au/screwits/comparison.html



Aviation Consumer Tiedown Test video of test results of various tiedowns:

http://www.youtube.com/watch?v=Loq1olceSIE



What do I use? A doggie auger type made of titanium that I purchased at:

http://www.ultralightnews.com/reviews/tiedown.htm

Very strong!!!!

However, I do not believe that this tiedown is available as I get no
response

from either an email and phone is no longer in service.



The result is that all kits do not meet FAA requirements - see video

So know your soil and buyer beware.



Gary





_____

From: Tom Packard [mailto:tjpackard@yahoo.com]
Sent: Saturday, April 02, 2011 11:30 AM
To: gargus7@att.net
Subject: [Bulk] Tie downs



Hi:
Saw your post regarding the Zenith planes not being secured with the Claw
tiedowns. Is there a specific tie down you know of that's better in wet
soil? I'd appreciate your feedback as I would hate to have my SR flip over
at Oshkosh this summer.
Thanks,
Tom Packard
SR 043





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