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RV-8 wiring diagram

 
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tnikkel



Joined: 11 Jun 2017
Posts: 2

PostPosted: Tue Jun 13, 2017 4:01 am    Post subject: RV-8 wiring diagram Reply with quote

Currently starting the wiring on the RV-8 I am building. Attached is the diagram for the main power and charging system. I would like a second opinion to make sure I have not made a mistake. Ignore the avionics bus that's planning for the future if I ever add that. The wiring from the circuit breakers is all sized properly. The battery is mounted behind the rear baggage in the aft part of the airplane.

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N285TS Power.bmp
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N285TS Power.bmp




Last edited by tnikkel on Tue Jun 13, 2017 4:54 pm; edited 1 time in total
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user9253



Joined: 28 Mar 2008
Posts: 1906
Location: Riley TWP Michigan

PostPosted: Tue Jun 13, 2017 6:31 am    Post subject: Re: RV-8 wiring diagram Reply with quote

It seems that some of the feeders are larger than necessary and could be smaller by one or two wire sizes.
Can the main power bus feeder be smaller?
Can the E-Bus feeder be smaller?
The E-Bus bridge diode only needs one wire feeding it, not two.

If the E-Bus switch is inadvertently left on during engine start, the aux battery will help crank the engine and could trip its circuit breaker. That problem can be eliminated by connecting the output of the E-Bus relay to one of the inputs of the bridge diode.

Having an engine start button on the control stick could be dangerous. Is it really necessary?

An avionics switch is a single point of failure. Evidently it happened in Ron Simonton's RV. Read his post: http://www.vansairforce.com/community/showpost.php?p=1167360&postcount=7


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Joe Gores
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tnikkel



Joined: 11 Jun 2017
Posts: 2

PostPosted: Wed Jun 14, 2017 6:19 am    Post subject: Re: RV-8 wiring diagram Reply with quote

Thanks for your comment i appreciate the feed back.
Some of the feeders are bigger than they need to be but that's the wires I have. I see the downsides of having the start switch on the yoke but i do want it there. I have an enable switch which disarms the switch on the yoke. The enable switch also disconnects the e-bus during start.


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user9253



Joined: 28 Mar 2008
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Location: Riley TWP Michigan

PostPosted: Wed Jun 14, 2017 8:29 am    Post subject: Re: RV-8 wiring diagram Reply with quote

OK, I overlooked the switch that isolates the E-Bus during engine start. Your wiring diagram looks OK to me.
Quote:
The enable switch also disconnects the e-bus during start.


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dilsonfrota(at)gmail.com
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PostPosted: Thu Jun 15, 2017 1:28 am    Post subject: RV-8 wiring diagram Reply with quote

Hi Joe

Have you considerate to use EXP BUS, instead of discrete circuit breakers?
I use them, they are very reliable.
Advantages are it provide circuitry for the second battery, not so expensive and much less wiring.
I'm not a representative Smile 😄
I'm sorry if I throw you in another direction, but I think it's worth at least to give a thought.
Regards 
Dilson
Em 14 de jun de 2017 13:37, "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)> escreveu:
Quote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>

OK, I overlooked the switch that isolates the E-Bus during engine start.  Your wiring diagram looks OK to me.

>  The enable switch also disconnects the e-bus during start.


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Joe Gores




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