Replies to This Discussion

Permalink Reply by John Austin on March 13, 2026 at 7:28am

BTW, William, no personal experience with them, but Legit Avionics in Indiana has taken over the US MGL sales and service.

John

N750A

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Permalink Reply by William Oliver on March 14, 2026 at 6:03am

Thanks for the info I will contact them . Its good to see that a company in the U.S. picked the equipment line up. I have studied their install instructions quite a lot and as I understand it there is a U.L. Power screen that displays data from the ECU, that's one of the features that I am interested in.

 So thanks for the info.

William

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Permalink Reply by Bob Simmons on March 15, 2026 at 2:58pm

It should have both.

https://cdn.shopify.com/s/files/1/0749/5958/5316/files/Blaze_EMS-2.pdf

Diagram on page 55.

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Permalink Reply by William Oliver on March 17, 2026 at 8:07am

So I have been studying the manual and I have been thru it at least 4 time to find the information you guys have indicated was in there, its a lot of info to absorb.

I have also noted that they (MGL) requires an engine ground system. I did run a wire to the engine block and then made a multiple attachment point in the cockpit. The remainder of the equipment will go to the battery ground.

Any thought on that ??

I have never worked with Can Bus  any thoughts on that?.

How did you deal with the inter connection ?

I found that the high density plug uses machined pins .I order prewired plugs I am so glad I did .

On another subject !

I will be using the AV30-E's for flight instrument and they use the hi density plug and I have ordered a used crimp and guide tool. No prewired plug offered.

I appreciate your help.

William

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Permalink Reply by Bob Simmons on March 17, 2026 at 7:49pm

You should be using a common ground for instruments and avionics. That can be a dedicated bus bar in the panel that connects to the engine block, and that will suit the purpose MGL is trying to get across, that you shouldn't use a direct connection to battery negative as your EFIS ground. That's the reason they put that in the manual. I would use a separate bus for engine connections and avionics connections.

This document is geared more toward avionics and instruments, but....

Ground%20Loops%20and%20Noise%20in%20Aircraft%20Avionics.pdf

There's no copyright restrictions. I wrote it. Feel free to copy and distribute.

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Permalink Reply by William Oliver on March 26, 2026 at 10:37am

That is a very good analyst of the ground issues in Home built aircraft process, it applies to about any equipment that we add something to electrically.

I must admit it has made me think about the alarm signals and the other inputs to the audio section.

On a side note ,I bought a home built one time and the intercom was so noisy that you had to yell in it  to be heard. I had headache after each flight. I finally got the needed hours and then pull the intercom wiring out and put heat shrink tubing on it then i added the shielding from some coax i had and then more heat shrink. There was world of difference.

I will be using EV-30 Flight instruments and they state " shielded wire for power lead"

Thanks for posting you paper.

Rick

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