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JohnFrance
Joined: 17 Sep 2014
Posts: 79
Location: Grenoble France
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 Posted: Wed Oct 21, 2015 7:47 am Post subject: Choice of circuit breaker, where to install radio modules? |
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Hello to all,
I am planning to upgrade my avionics panel this winter using a Trig TY 91 radio and a Trig TT 21 transponder.
I am thinking of changing the circuit breakers (Europa square type 1, 3 and 5 amp).
Can anyone recommend a make and model that is well suited to the application?
It will probably be necessary to rewire the entire panel or at least part of it, any advice on wire types/section and method of attaching wires, crimping as opposed to soldering would be welcome.
My present thinking is to install both power/transmitter modules behind the rear baggage bay bulkhead to reduce coaxial transmitter cable length to a minimum, free up space behind the panel and move some weight rearwards so I can install a Li-Po battery in the engine compartment replacing the "heavy one" behind said bulkhead.
Has anyone already done something similar or are there reasons not to install this way?
Any constructive advice/criticism welcome.
Regards,
John
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Europa mono Nr 192 |
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graeme bird
Joined: 15 Jul 2010
Posts: 434
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| Posted: Sun Oct 25, 2015 12:19 pm Post subject: Re: Choice of circuit breaker, where to install radio module |
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As an ex UK MOD avionic/electronics apprentice, I used Raychem wire, 18AWG for power and 22AWG for signal (farmel 134-892)
I used white wire with small plastic coloured/numbered sleeves on the ends for identification.
I used reasonable quality (gold turned pin) solder D connectors with sleeves on the terminals to go through the bulkheads and connect the dash to other wiring but in retrospect crimped would have been better.
Where possible I used crimped ring terminals (the best quality I could afford) and made a 'quiet' and 'noisy' grounds and power using brass studs star points in the dash with very thick short wires through to the battery.
I tie wrapped or laced the wires to form looms.
I managed to get hold of some similarly insulated screened signal wire (4 wire) for sensitive bits like mic cables.
I the breakers I used were standard industrial thermal magnetic pop out/reset types.
I can't see a problem with where you intend to mount the radio. I think I would probably be more concerned with the routing of the mic wires than the loss in the feed to the antenna though. I sort to keep those short but then I used the Funkwerk integrated units.
Surprised you want to move weight back. Mine would probably benefit from weight being moved forward - seems to fly better 2 up.
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk |
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