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bcone1381
Joined: 25 Apr 2017
Posts: 42
Location: Southeast Michigan
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 Posted: Sun Oct 25, 2020 6:48 pm Post subject: Wire Harness Fabrication |
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A lot of theory and educational design topics get discussed and promoted here. System Design and wire harness fabrication and installation are two very different arenas in EAB aircraft.
I've seen some elegantly installed electrical systems. The wire bundles look like a highway system with roads branching off left and right as they pass each component. They are very orderly and neat.
The techniques used that might make these kind of wire bundles inspire confidence is of interest to me. I've youtube'd a few things. Rope being used to plan the route of a harness from components, to a main trunk, to components. I've seen wiring diagrams drawn onto 8' long butcher paper that is attached to 4x8 sheets of peg board and the harness is build on to it.
Are there some outstanding resources available to help take the theory of aircraft electrical systems and help a tenderfoot look like a veteran as he applies AC43.13 without redoing it three times?
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Bearhawk Patrol Kit Build
Last edited by bcone1381 on Wed Oct 28, 2020 4:51 am; edited 1 time in total |
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jsajpf
Joined: 21 Feb 2019
Posts: 8
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| Posted: Mon Oct 26, 2020 7:46 pm Post subject: Re: Wire Harness Fabrication |
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If you haven't run across the Dark Aero project yet, recommend having a look at their Knowledge Base resource they make available. The Avionics Spreadsheet Tool is a pretty impressive collection of info to aid in planning a build. Found here: https://www.darkaero.com/knowledge/avionics/.
They have a video on their YouTube channel explaining some of their routing layout techniques (i.e. a variation on the butcher paper theme).
The FAA has some guidance available in the form of a Job Aid with numerous pictures and illustrations, meant primarily for large transport category aircraft. https://www.faa.gov/training_testing/training/air_training_program/job_aids/
And this resource from Australia has proven useful; its kind of an updated Chpater 11 of AC 43.13-1B: https://www.casa.gov.au/standard-page/ac-21-99-aircraft-wiring-and-bonding
Best,
John
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mikepienaar09(at)gmail.co
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| Posted: Tue Oct 27, 2020 9:59 am Post subject: Wire Harness Fabrication |
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| Quote: | From my experience
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Leave extra wire at the end of where ever you are routing your wire for a
service loop and just in case, 4 or 5 feet is not excessive.
Make sure you have enough space, the bundles are much thicker than I
imagined at the start.
Put in 4,5 or even 6 extra wires just in case you want to reposition
something or decide on something new
I printed labels on paper and used clear heatshrink to seal the labels onto
the wire, shorter intervals between labels at the termination and larger
spacing in the middle of the run, this worked well
Don't be discouraged if it looks messy while you are working, it looks much
better after you tidy up and lace or tie your bundles.
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