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I decided to turn my normal tire into a breakaway tire. Tonight I was able to make the internal armature which will hold each half of the tire in a semi-circle shape. I used 1" EMT conduit and made a jig to bend the curve.







This armature is made to be a 28" diameter on center. That would make it sit in the center of a 4" drainage pipe shaped to a 24" inner diameter. That's all for tonight. I still have some training to do.
 

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More progress. I glued wood circles onto the armature in order to keep the drainage pipe in place. The masking tape is just holding the wood in place while the adhesive dried.


Then I put the pipe over the armature. Looking good so far!


The magnets are in the mail, and I purchased the colored duct tape tonight (though I think I'm going to try to locate heat shrink tubing).
 

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Both armatures are now complete:




And the magnets arrived! They are 1" square and 1/2" deep. They have a magnet to magnet pull of 49.48 pounds.


I embedded the magnets in the end plates on the armature:
 

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More progress. Got the magnets in both ends now...


Here's a little explanation of what I have going.
 

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Just have to add side straps
 

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Thanks GatorDog. It was a fun project!
 

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Hey Willy, how long was the conduit use used on each side? I'm trying to build my own and was wondering. Thank you!
It was built a really long time ago- I don't remember. But the inner diameter is 24" and I think the plywood rings are 4" so the conduit is a 26" diameter circle, or 81.68" in circumference.
 

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Very nice design! I'm going to use it as the basis for my own tyre jump. I have made the hoop out of 3mm aluminium so far. I will be adding some electronics to make it able to be remotely controlled ,like the jumps i have made. The end design will be that the jumps will automatically adjustedwhen the dogs microchip is scanned. Here's a link to my prototype : : https://youtu.be/QZH3cLPUb0U. And the first sets : https://www.facebook.com/sfdab/videos/949379378515040/.
 

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Wow nice yeah I wish I was handy -agility equipment is so expensive and the less inexpensive stuff is just crap.
 
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