13.0 Wire routing

This entry is part 45 of 67 in the series 13 - Electrical / Instruments

One of the tasks with the electrical system is securing the wires. Larger wires like the main power distribution wires and large wire bundles are secured by Adel clamps.  2013-12-13 IMG_20131213_101703_841a

It’s also possible to use Adel clamps for smaller wire bundles. This is the autopilot roll servo wire harness.

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But in some places, Adel clamps are difficult to use if there’s limited space/access since they have to be screwed in and they’re a bit overkill for small wire runs.

One of the places they won’t work is on the gear legs.  I don’t want to do anything that could affect the integrity of the gear leg like drilling a hole in it.

So I picked up a bag of plastic wire tie mounts with self adhesive foam backing at Oshkosh.


Because the gear leg is not smooth, I made some “pads” with epoxy/cabo covered by some small 1″x1″ pieces of wood covered with duct tape.  Once the epoxy cured, I popped off the wood and had a perfectly flat surface to attach the foam mount to.

Here’s the gear leg with the wire mount.

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It held pretty good… for a while.  Then it came loose.  The amount of pull on the wires when the gear retracts is just more than the foam adhesive can handle. I even found some other places that didn’t have much stress on them which came loose as well.  And since it’s made out of nylon, finding a glue that can adhere to it would be a pain. There are probably some of these available that have NASA quality adhesive but they’re also probably $5 each.

So fellow builder Erik Franks mentioned these guys.

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Since they’re made out of aluminum, Resin Research epoxy will bond to them very well (RR epoxy is real good for bonding to aluminum!).  They’re small, light and have a lower profile than the plastic mounts.

So next week when I’m down in Sebastian, I’ll swap out the old plastic POS mounts with the new ones.

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