I am using the Mitsubishi 60-A; which I guess is what came
with the 20B.
I put on a larger size pulley to reduce the rpm.
It has in internal voltage regulator, which is powered,
and provides field current, directly from the output via an internal connection.
I use the internal regulator, but made the relatively easy
mod of disconnecting the internal connection from the output so I can provide
that from an external circuit. In that circuit I have the ‘crowbar’
over-voltage protection (bought from Aeroelectric Connection). It connects
across the circuit breaker; and in the event of over voltage (I think at 16-16.5v)
it shorts to ground and trips the breaker.
Initially I found that the charging voltage was on the
high side; sometimes up to 15v. I realized that the regulator was then reading
the voltage from my external supply; which after traveling to the battery and
through my circuit (battery in front, engine in back) had some drop; thus causing
it to charge to a higher voltage. Solved that by using the external circuit to
power a relay close to the alternator which powers the regulator from the
output. All is well. Dave Leonard has the same setup; and same story.
Al
-----Original
Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf
Of josrph berki
Sent: Tuesday, September 21, 2010 3:14 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Alternator
Ed,
Thanks
for the input. Did you modify it at all to remove the regulator or
provide
for disabling the field?
Joe
-----
Original Message -----
From:
"Ed Anderson" <eanderson@carolina.rr.com>
To:
"Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent:
Tuesday, September 21, 2010 6:38 PM
Subject:
[FlyRotary] Re: Alternator
>
Joe, I still fly with the old standard Rx-7 alternator - have been ever
>
since I launched in 1998 - never failed so I'm still hauling around about
5
>
lbs more weight that I need to. So can't offer you any light weight
>
solutions. But, there are others that have done research on light weight
>
alternators whom I'm certain will offer suggestions.
>
>
Ed
>
>
Edward L. Anderson
>
Anderson Electronic Enterprises LLC
>
305 Reefton Road
>
Weddington, NC 28104
>
http://www.andersonee.com
>
http://www.eicommander.com
>
>
>
--------------------------------------------------
>
From: "josrph berki" <jskmberki@windstream.net>
>
Sent: Tuesday, September 21, 2010 6:21 PM
>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>
Subject: [FlyRotary] Alternator
>
>
> What alternator is being used on the rotary? With EFI and electronic
>
> ignition I would think a 60 amp would be suitable. Does anyone have
a
>
> light
>
> weight small solution? Thanks for any help.
>
>
>
> Joe Berki
>
> Limo EZ
>
>
>
>
>
> --
>
> Homepage: http://www.flyrotary.com/
>
> Archive and UnSub:
>
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>
>
--
>
Homepage: http://www.flyrotary.com/
>
Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html
--
Homepage:
http://www.flyrotary.com/
Archive
and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html