Fairchild Club Forum

--- In fairchildclub@y..., "ranger440c5" wrote:
> Thane, The big question here is if the gen is mechanically
compatible.
> It doesn't seem to appear on Ranger approved accessory list.
However,
> if installed in other than aircraft it could be converted to "A"
> circuit and NAPA has a 3 unit GCU that should be compatible.
>
>
> --- In fairchildclub@y..., "pt19b2001" wrote:
> > The Pierson Gen Terminals are marked GRD, FLD and ARM. The GRD
> > terminal has on brush and field lead connected to it,the ARM
> terminal
> > has one brush lead connected to it and the FLD terminal has one
> field
> > lead connected to it. I believe from what you said before that
this
> > is a type "B" circuit? I took it over to a auto electic shop and
> they
> > spun it up. They said it worked perfectly. Looks like new inside
> the
> > unit. Data plate and arrows mark this unit as left hand rotation.
> So
> > now all I need is a GCU. I e-mailed Zeftronics sales three days
ago
> > but still no reply.
> >
> > Thane Riffle

> Thane, The big question here is if the gen is
> mechanically compatible.
> It doesn't seem to appear on Ranger approved
> accessory list. However,
> if installed in other than aircraft it could be
> converted to "A"
> circuit and NAPA has a 3 unit GCU that should be
> compatible.

----- Original Message -----
From: "Michael Denest"
To:
Sent: Saturday, March 23, 2002 6:57 AM
Subject: Re: [fairchildclub] Re: PT-19B Electrical system


Being listed on the Type Certificate Data Sheet only
means that that appliance was approved for the
airplane when the TC was issued. Regardless of being
listed or not, installation requires a 337 field
approval. If the item in question is not listed, it
is up to the installer (you) to prove that it is
compatible and will not adversly affect safe
operation.
Usually, I prepare an information package on the item
using the manufacturers data, airframe or engine specs
and any drawings or schematics as necessary PRIOR to
doing ANY work. I start the effort with a phone call
to my local FSDO Airworthiness Inspector discussing
what I want to accomplish. This is followed with the
information package containing a letter to the
inspector describing the installation and any tests to
be performed, drawings, pictures AND two unsigned
copies of FAA Form 337 for Block 3 approval signature
by the inspector. Remember, you have nothing to hide,
they are here to help you maintain your aircraft in an
airworthy condition.

Mike

--- ranger440c5 wrote:
> Thane, The big question here is if the gen is
> mechanically compatible.
> It doesn't seem to appear on Ranger approved
> accessory list. However,
> if installed in other than aircraft it could be
> converted to "A"
> circuit and NAPA has a 3 unit GCU that should be
> compatible.


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> It has always been explained to me IF it is on the
> TC, only a log book entry
> with the words... "installed xxx using procedures in
> AC 42.13-1B." Your
> FSDO may interpret it differently.
>
> Cy Galley, TC - Chair, Emergency Aircraft Repair,
> Oshkosh
>
> Editor, EAA Safety Programs
> cgalley@qcbc.org or experimenter@eaa.org

----- Original Message -----
From: "pt19b2001"
To:
Sent: Thursday, March 21, 2002 1:44 PM
Subject: [fairchildclub] Re: PT-19B Electrical system


> The Pierson Gen Terminals are marked GRD, FLD and ARM. The GRD
> terminal has on brush and field lead connected to it,the ARM terminal
> has one brush lead connected to it and the FLD terminal has one field
> lead connected to it. I believe from what you said before that this
> is a type "B" circuit? I took it over to a auto electic shop and they
> spun it up. They said it worked perfectly. Looks like new inside the
> unit. Data plate and arrows mark this unit as left hand rotation. So
> now all I need is a GCU. I e-mailed Zeftronics sales three days ago
> but still no reply.
>
> Thane Riffle
>
>
>
> --- In fairchildclub@y..., "ranger440c5" wrote:
> > Thane,
> > Not sure about the Pierson item. How are the terminals marked? F+
> A+
> > A-? How many are there 2 or 3? Check the brush that has the field
> > tied to it for continuity to frame with a multimeter. While your'e
> > at it spin the little bugger about 800 rpm in the direction you
> want
> > it to turn and check voltage across the 2 brushes +to+,-to-. If
> > voltage is developed positive, rotation is correct and residual
> > magnetism is still present. If neg voltage developed(a minus sign
> on
> > digital meter, a left side deflection on analog meter) rotation
> > incorrect. No voltage may signify loss of residual magnetism,
> fields
> > need flashing.
> > The Eclipse you have is a good little gen. Not sure if worth
> > rebuilding especially since you might have a usable alternative. It
> > is a type 1235. 30V 15A square head on flange with a 1" dia.cooling
> > spout on brush end, and has a nice rubber coupling inside the drive
> > end. Should have a directional arrow on the bearing cap on the
> brush
> > end frame(don't trust it). This unit should have only 2 brushes
> other
> > wise very similar to 309 type including terminal box on brush
> > endframe with terminal studs marked A-,A+,&F+. Which tells you that
> > it's type B circuit as the regulator will be supplying the power to
> > the fields.The one drawback is it must be force cooled. most others
> > are self cooled.
> > There are a couple shops that know these units and they are
> > available. Let's hear what you come up with.
> >
> > --- In fairchildclub@y..., "pt19b2001" wrote:
> > > Looks like this one is a type "B" one of the brush leads and one
> > of
> > > the field leads are connected together to a terminal marked
> ground
> > > and this lead appears to be attached to the generator frame. The
> > > manufacturer of this generator is Pierson Electrical &
> Engineering
> > > Corp. type 2411 28.5V 15A still has sticker on it from Kelly AFB.
> > > Which is were my plane was based. I also have a bendix-Eclipse
> 28V
> > > generator. But no type # on it only MFG's DWG# 112180-1235-1. In
> > the
> > > PT erection and maintance manual it talks about type 1235
> generator
> > > installed in the PT-19B. I think thay meant drawing # but not
> > shure.
> > > the one I have looks like it was sitting in water. I think it
> will
> > > need a rewind. I have never seen another one of of this type,
> wish
> > I
> > > could find one. You would think they would be all over the place.
> > but
> > > that does not appear to be the case.
> > >
> > > Thanks for the help
> > > Thane Riffle
> > >
>
>
>
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