Home-made Tiedowns

Home-made Tiedowns

Postby N111YX » Mon Aug 06, 2012 11:36 pm

I made these from 1.5 in extrusion and some 10 inch bolts for about $35. There is a company making something similar and I'm not trying to take away any business but if one can build a Sonex, these should be no problem. I'm sure that plenty of Mooney pilots will cough up $100.00 so as to not get their hands dirty... :lol:
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Kip

2010 Waiex 0082 (first flight May 2010)
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Re: Home-made Tiedowns

Postby 142YX » Tue Aug 07, 2012 1:39 am

nice. how much does the whole setup weigh?
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Re: Home-made Tiedowns

Postby N111YX » Tue Aug 07, 2012 9:26 am

It's about 4.5 lbs. The stakes are the bulk of it!
Kip

2010 Waiex 0082 (first flight May 2010)
Jabiru 3300 #1637 and #3035
Dynon D-180
Becker radios
Garmin GDL 82 ADS-B
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Based near Atlanta

Also flying a...
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Re: Home-made Tiedowns

Postby structurespilot » Tue Aug 07, 2012 2:07 pm

Nice job on the tie downs Kip. We used to use spiral screwing style dog tie downs with our C182. They worked great in grass, but not so good in gravel.
Waiex Tail kit built! Working on Corvair engine core.

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Re: Home-made Tiedowns

Postby N111YX » Tue Aug 07, 2012 6:46 pm

I have found that the dog tie downs are frowned upon ever since the Lakeland tornado. I was a bit embarassed to be using them at OSH and was even more embarassed when one broke while I was tightening it into the hard ground at OSH. I "rented" a set from EAA during the stay but now I have a real set... :)

structurespilot wrote:Nice job on the tie downs Kip. We used to use spiral screwing style dog tie downs with our C182. They worked great in grass, but not so good in gravel.
Kip

2010 Waiex 0082 (first flight May 2010)
Jabiru 3300 #1637 and #3035
Dynon D-180
Becker radios
Garmin GDL 82 ADS-B
1050 hours
48 states visited
Based near Atlanta

Also flying a...
2000 Kolb Firestar II, Rotax 503, 575 hours
N111YX
 
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Re: Home-made Tiedowns

Postby structurespilot » Tue Aug 07, 2012 7:07 pm

What happen at the lakeland tornado? Did planes flip over due to the dog ties?

Norm
Waiex Tail kit built! Working on Corvair engine core.

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Re: Home-made Tiedowns

Postby N111YX » Tue Aug 07, 2012 7:38 pm

Many airplanes were flipped and/or destroyed. It seems that nearly all tie-down sysytem types failed but the dog tie downs were the first to go. It makes sense. Would the desingers really engineer a multi-thousand pound pull force capability for dog security...?



structurespilot wrote:What happen at the lakeland tornado? Did planes flip over due to the dog ties?

Norm
Kip

2010 Waiex 0082 (first flight May 2010)
Jabiru 3300 #1637 and #3035
Dynon D-180
Becker radios
Garmin GDL 82 ADS-B
1050 hours
48 states visited
Based near Atlanta

Also flying a...
2000 Kolb Firestar II, Rotax 503, 575 hours
N111YX
 
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Joined: Fri Jun 03, 2011 9:43 am
Location: Atlanta, GA USA

Re: Home-made Tiedowns

Postby fastj22 » Thu Aug 09, 2012 12:29 am

I talked to the vendor at Airventure selling the design you used. He had a really good design but wanted $70 for his kit.
I guess he didn't realize that us home builders could do the same thing for $10 with spare material from our kits and a trip to Home Depot. Or like you said, was marketing to the Mooney guys who don't want to get their hands dirty.

However, it did get me thinking. I thought the steel spikes were excessively heavy. I have a source of titanium rod that will machine it to the size of the steel spikes. But I would need some commitment from enough builders to make them economical. Maybe around a $1 per spike if I order 1000 of them. Or just use aluminum rod as the shear force per rod would be minimal. I get enough folk, I'll make it happen.

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Re: Home-made Tiedowns

Postby N111YX » Thu Aug 09, 2012 10:41 pm

I think I paid $1.32 per "spike" (10 inch bolt) so that price would be attractive...:)
Kip

2010 Waiex 0082 (first flight May 2010)
Jabiru 3300 #1637 and #3035
Dynon D-180
Becker radios
Garmin GDL 82 ADS-B
1050 hours
48 states visited
Based near Atlanta

Also flying a...
2000 Kolb Firestar II, Rotax 503, 575 hours
N111YX
 
Posts: 705
Joined: Fri Jun 03, 2011 9:43 am
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Re: Home-made Tiedowns

Postby 142YX » Sun Aug 12, 2012 11:23 am

fastj22 wrote:I have a source of titanium rod that will machine it to the size of the steel spikes. But I would need some commitment from enough builders to make them economical. Maybe around a $1 per spike if I order 1000 of them. Or just use aluminum rod as the shear force per rod would be minimal. I get enough folk, I'll make it happen.


I would love to believe that price, but unfortunately i must assume you have some figures incorrect given the price for titanium rod, even 3/16" diameter is about $10 per foot:

http://www.mcmaster.com/#standard-titanium-rods/=itf7qp

what's your source?
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