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  #61  
Old 04-23-2018, 02:47 PM
444TX 444TX is offline
 
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Rob

Send me a private message with your email and I will send a wire sizing graph that has additional lines for wires in a bundle, free air and max 2 minute load.

Thanks for reposting your diagram. While maybe not perfect, you did a nice job in the basic design. I had already made a copy last week and was surprised to find it absent this weekend.

If you want I will clarify my recommendations in relation to your last comments. Not as a rebuttal, but to help.

George Meketa
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  #62  
Old 04-23-2018, 07:06 PM
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Nihon_Ni Nihon_Ni is offline
 
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Thanks George, that would be great.
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RV-8 under construction as of Sep 30, 2012
Tail kit completed on Feb 8, 2012 (180 hrs)
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  #63  
Old 04-24-2018, 11:40 AM
Mich48041 Mich48041 is offline
 
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Location: Riley TWP MI
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In the event of high voltage, both of the over-voltage modules could trip (assuming Aux Alt switch is turned on).
Their physical location doesn't matter. Both modules will be monitoring the
same system voltage. If the aircraft battery is lead acid, then I might not
install an over-voltage module in the SD-8 circuit. That small aux alternator
will have trouble maintaining 14 volts with normal loads turned on. Over
voltage from the SD-8 is unlikely.
But if the aircraft battery is lithium, I would protect the battery from over
voltage from both alternators. It is not desired to have the battery disconnect
itself from the aircraft, or worse yet, have it catch on fire.
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Last edited by Mich48041 : 04-24-2018 at 11:58 AM.
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  #64  
Old 04-25-2018, 02:57 PM
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MarkW MarkW is offline
 
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Location: Edgewater, FL. KSFB
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Hey Rob,
Nice job on the design and drawing. This was one of my favorite points of the build.
I haven't spent much time looking but if I recall the GTN650 you will need a main power as well as the Com and Nav. I did not see that.
You have quite a few busses going on there. I have three fuse blocks for three busses.
Also I think you will find that even with a very detailed power consumption table, you will use less than that.
My full glass panel runs about 11 amps after the battery recovers within about 10 minutes. I wish I had used the 40 amp B&C alternator rather than the 60 amp.
Have fun with it.
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  #65  
Old 05-02-2018, 04:29 AM
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Erimo Erimo is offline
 
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Location: Marcoussis, France
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Quote:
Originally Posted by Mich48041 View Post
Schematic below uses a double pole momentary push button start switch
to disable the avionics relay during engine start. The diode in your drawing
is not wired correctly. Actually the diode is redundant because there is
already one connected to the start contactor. But if you want a second
diode, connect it to ground as shown below.
Hi Joe,

I can't see your draw or pict.
Regards.
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  #66  
Old 05-02-2018, 07:02 AM
Mich48041 Mich48041 is offline
 
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Eric, I edited my post #14 above by moving the pictures from photos.google to shutterfly. Can you see the electrical drawings now?
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  #67  
Old 05-03-2018, 01:15 AM
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Erimo Erimo is offline
 
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Yes very well !
Thank you Joe.
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