Hello Paul,
I'm in the early planning stages of my Velocity electrical system, and

I

was

wondering if you have any words of wisdom with regard to electrical

system

issues that are unique to a rotary conversion.  I am planning to use

the

stock 20B alternator / regulator.

Thanks,
Don Mitchell

Is there a built in regulator in that 20B alternator?
If so it could, in theory, run your battery down faster than if you
had an external regulator with separate field winding.
I think the failure mode that causes this is a shorted field.
It helps if you can disconect a shorted field from the battery.
That way the EFI/IGN can run longer. Something along these
lines as I recall.

Paul Lamar

Ed Anderson wrote:

Paul,
    I fly with the Mazda alternator with internal regulator.  I placed a 5
amp circuit breaker in my field coil circuit to pull and disable the
alternator should it malfunction.  So far no malfunctions, but pulling the
CB does disable the alternator output.

Ed Anderson

So it is not a true one wire alternator with the field fed internally?
What year is that Ed?

Paul Lamar

"Bass, Jerry" wrote:

It Sounds like I finally did something right.  I put a switch in the field
circuit, Per Tracy's sketch.  Then he said it was the main key switch.  I
now disable that circuit separately, as I found prolonged on, in the hanger,
would drain the battery.

I have a Power Distribution Board for sale.  $48 each. Custom distribution
for now.  Each board has 5 or 8 "fuses" PTCs.  5 for Switched output, like
lights and strobes, and 8 for typical not-switched outputs.

Jerry Bass

Jerry if you are going to market your stuff effectively a few suggestions.
Put a picture of your product and a good description on your web site and 
add your email address and web site address to your signature file.
Otherwise we will have a whole repetitive series of questions on here from our new
subscribers.

Paul Lamar
 
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