Electrical System / Rotary Engine

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

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


Ed Anderson wrote:


Correct, Paul.

    There is a wire that feeds the field coil (CB in this one), one that is
used for the idiot light, and the large one for the Output voltage, so three
altogether.  Mine is a Bosch alternator  remanufactured  for the Mazda RX-7
1986 vintage. Thus far it has stood up well.

Ed Anderson


 
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