Matronics Email Lists

[quote="Eric Page"]Have you looked at Bob's newest electrical architecture, Z-101B?

http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z101B.pdf

Yes. I have been keeping up. A fri ...

[quote="alec(at)alecmyers.com"]Isn’t that what Schottky diodes are for?

This and another post suggested diode isolation.

Trouble with adding elements to our systems is they too have ...

Recently I spotted a document from a well known brand of EFII recommending an “Essential Buss” backed up with a Aux Battery and simple switch to connect it. While this is supposed to make powering ...

We all know we need backups on any circuit needed for comfortable completion of a flight. I aimed for that. I have several circuits that fit that need, things like pumps and ECU's and Ignition Coils. ...

This one:

https://www.actuonix.com/p16-50-256-12-p

I calculated hinge moments on my trim tabs, and the other P-16's would back drive, but the 256:1 was adequate.

Doing your own homework is e ...

Charlie,

Not Menzimer, using Actuonix P-16P for elevators, P-16L for rudder and aileron. As light as MAC, fits in my stabilizers, less expensive, rated for dust and condensation, right speed, and e ...

Thanks for the knowledgeable responses.

It looks like nothing I have in the back end is terribly sensitive, and the thinking around the topic is mostly fuss over nothing. So, in the aft end of the ...

Before we get too far into implying that I listen to poor sources, my one and only source of advice on all of this has been "The AeroElectric Connection" by Bob Nuckolls, 12th edition. Speci ...

Here is my little problem. I am trying to wire my fiberglass airplane with internal antennas properly. I have little insight on electromagnetic compatibility. Please help.

I know that I am suppose ...

The expensive commercial splitters and decouplers are one option. The other is building them from Jim Weir's Attenna Reference Text. It is available on this page of his website.at:

http://www.rsten ...

If the battery contactor fails open during flight (unlikely), how will the pilot know it?

When the pilot pulls the throttle to idle, voltage drop from 14 might be noticed.

A further point is to ...

Answering the OP questions in order:

1) The CB is usually part of the crowbar over voltage protection for the alternator. If it is fed by a long wire, it can be shorted without tripping the downstr ...

All things can break. The question of this experienced product engineer is then how often does this occur and how severe is the result of a failure. Some might take the perspective that the risk of co ...

The concerns I have with LiFe batteries - and these are not disqualifies - are:

Our baseline is SVLA battery and its connections, and they do have low but real chance of failing and dropping the ba ...

Another temptation is to drive two VOR receivers off one VOR antenna. This might be acceptable. What happens is splitters divide the received power in half between the two output cables. (Again, from ...

Two VHF antenna on one wingtip is generally bad practice.

RST Engineering (Jim Weir) talks about the de-tuning effects of having any piece of metal near antennas. Specifically, Jim Weir tells us t ...

15 of you have visited this page and not even one of you will share "I have X many hours in little planes and have had Y of this failure and Z of that failure"?

OK, I shall start. In 2200 ...

I and another EAA chapter member are working on architecture decisions in our respective airplanes. In the process, I have assembled Failure Modes and Effects Analyses for several common options. Unfo ...

First off, if Ross says run separate fusing and wiring to power things in his system, it is a darned good thing to heed.

I do not even pretend to know what Ross did inside the box, but I suspect t ...

IIRC, the dual alts are supposed to eliminate the need for load shedding. The Clrnc/BO bus is not an endurance bus.

Does not seem that way...

Bob has talked about how the Aux Alt and its Ford r ...