REFLECTOR:Alternator Update
Ronnie Brown
reflector@tvbf.org
Sun, 14 Sep 2003 12:47:01 -0400
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There is a difference between the Cessna alternator fan blades and the =
automotive Hitachi. The blades twist to the right on the Cessna and to =
the left on the Hitachi. However, this does not reverse the air flow. =
Both blades will cause air to be ejected outwardly, not inward. The =
only difference is the air flow versus air pressure when axial flow =
blades are "aggressively" pitched versus turned the other way (I forget =
which is which). =20
I have a temperature sensor placed next to my alternator - to measure =
cowl exit temps. This is running around 160 degrees and is not very =
warm as far as engine environments go. I really don't think temps are a =
problem unless you have a closed cowl, lots of exhaust pipes in the =
cowl, and low air flows. Vibration is a factor on aircraft engines, but =
looking at the Cessna alternator (has a motorcraft stamp on it) looks =
just like a car alternator except the three case bolts have their heads =
drilled for safety wire. No other differences are apparent.
Ronnie
----- Original Message -----=20
From: Brian Michalk=20
To: reflector@tvbf.org=20
Sent: Sunday, September 14, 2003 10:47 AM
Subject: RE: REFLECTOR:Alternator Update
Could you send a picture of the cooling fan?
I feel that a majority of the alternator failures are of the =
automotive type with internal regulator, and a fan designed to spin the =
"other" way.
-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On =
Behalf Of Ronnie Brown
Sent: Sunday, September 14, 2003 9:30 AM
To: reflector@tvbf.org
Subject: REFLECTOR:Alternator Update
I found and fixed my alternator problem. A broken wire between the =
field slip ring and the field winding. I added a U shaped piece of wire =
to reach beyond the broken end of the field wire and soldered it back =
together. It worked fine for one hour yesterday.
Here's what I found out while researching this problem:
My alternator is made by Hitachi and used on 81-87 Mazda (probably =
not RX-7's) per NAPA parts manual and does not have an internal voltage =
regulator. I have a VR-600 solid state regulator mounted on the =
firewall. Don George says he obtained these from AirTec at =
1-800-366-4746. They supply non- certified alternators for the =
homebuilt crowd.
Also, someone says the Velocity factory sells an internally =
regulated alternator for $200
I also got an email from <Mahlon_Russell@teledyne.com>
| Hi Ronnie,
| I think the actual P/N of the alternator you may have is a =
Mitsubishi
| 186-0355 or 14700. It may help in your quest for brushes! If you =
need a
| replacement we sell the complete set up: belt, alt. mounts =
brackets and
| hardware for $245.00. I agree expensive by automotive standards!
| Good Luck,
| Mahlon
|
Mahlon also sent the following:
| Hi Ronnie,
| It depends on where your engine came from or what application you =
are
| trying to mimic.
| Pipers used Mopar and Prestolite on O-320's
| Cessna used Ford on O-320's
| Beech used Ford and Prestolite on O-320's
| Can't remember what Bellanca and some of the others used but =
basically they
| all used some version of Ford, Prestolite or Mopar. To further =
complicate
| things the mounting brackets and ring gear support assemblies were
| different for each of the installations. IE belt that fit a ford =
alt.
| pulley doesn't fit a MOPAR flywheel and same thing for the =
mounting
| brackets. You really need to know what brackets and what flywheel =
you have
| to make the correct determination of what's the right Alternator. =
If you
| let me know what you have I will try to check it out for you On =
Monday when
| I am back in the shop. If you are totally confused feel free to =
call me at
| 1-800-624-6680 ext 305 and maybe I can better explain verbally.
| Anyway I hope this helps,
| Mahlon Russell
|
Time: 12:37:48 PM PST US
From: "Jim and Bev Cone" <jimnbev@olypen.com>
Subject: RV-List: Alternator
--> RV-List message posted by: "Jim and Bev Cone" =
<jimnbev@olypen.com>
The Pelican alternator sold by ACS is off of a Chevy Sprint
Spectrum. It is a small 65 amp alternator that is self regulating =
and has automatic
overheat protection that resets when an overheated condition is =
resolved.
I have one and it works well.
Jim Cone
Another post from kr shultz" <sfg0152002@yahoo.com
Think it is a Suzuki Samurai 1995 to 2001
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>There is a difference between the Cessna alternator =
fan blades=20
and the automotive Hitachi. The blades twist to the right on the Cessna =
and to=20
the left on the Hitachi. However, this does not reverse the air=20
flow. Both blades will cause air to be ejected outwardly, not=20
inward. The only difference is the air flow versus air pressure =
when axial=20
flow blades are "aggressively" pitched versus turned the other way (I =
forget=20
which is which). </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I have a temperature sensor placed next to my =
alternator - to=20
measure cowl exit temps. This is running around 160 degrees and is =
not=20
very warm as far as engine environments go. I really don't think =
temps are=20
a problem unless you have a closed cowl, lots of exhaust pipes in the =
cowl, and=20
low air flows. Vibration is a factor on aircraft engines, but =
looking at=20
the Cessna alternator (has a motorcraft stamp on it) looks just like a =
car=20
alternator except the three case bolts have the</FONT><FONT size=3D3>ir =
heads=20
drilled for safety wire. No other differences are =
apparent.</FONT></DIV>
<DIV><FONT size=3D3></FONT> </DIV>
<DIV><FONT size=3D2>Ronnie</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D3>----- Original Message ----- </FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dmichalk@awpi.com href=3D"mailto:michalk@awpi.com">Brian =
Michalk</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, September 14, =
2003 10:47=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: =
REFLECTOR:Alternator=20
Update</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D200214614-14092003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Could you send a picture of the cooling =
fan?</FONT></SPAN></DIV>
<DIV><SPAN class=3D200214614-14092003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D200214614-14092003><FONT face=3DArial =
color=3D#0000ff size=3D2>I=20
feel that a majority of the alternator failures are of the automotive =
type=20
with internal regulator, and a fan designed to spin the "other"=20
way.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> <A=20
=
href=3D"mailto:reflector-admin@tvbf.org">reflector-admin@tvbf.org</A>=20
[mailto:reflector-admin@tvbf.org]<B>On Behalf Of </B>Ronnie=20
Brown<BR><B>Sent:</B> Sunday, September 14, 2003 9:30 =
AM<BR><B>To:</B>=20
reflector@tvbf.org<BR><B>Subject:</B> REFLECTOR:Alternator=20
Update<BR><BR></FONT></DIV><FONT size=3D2>
<DIV>I found and fixed my alternator problem. A broken wire =
between=20
the field slip ring and the field winding. I added a U shaped =
piece of=20
wire to reach beyond the broken end of the field wire and soldered =
it back=20
together. It worked fine for one hour yesterday.</DIV>
<DIV> </DIV>
<DIV>Here's what I found out while researching this problem:</DIV>
<DIV> </DIV>
<DIV>My alternator is made by Hitachi and used on 81-87 Mazda =
(probably not=20
RX-7's) per NAPA parts manual and does not have an internal voltage=20
regulator. I have a VR-600 solid state regulator mounted on the =
firewall.=20
Don George says he obtained these from AirTec at =
1-800-366-4746. They=20
supply non- certified alternators for the homebuilt =
crowd.</DIV>
<DIV> </DIV>
<DIV>Also, someone says the Velocity factory sells an internally =
regulated=20
alternator for $200</DIV>
<DIV> </DIV>
<DIV>I also got an email from <<A=20
=
href=3D"mailto:Mahlon_Russell@teledyne.com">Mahlon_Russell@teledyne.com</=
A>><BR></DIV>
<DIV>| Hi Ronnie,<BR>| I think the actual P/N of the alternator you =
may have=20
is a Mitsubishi<BR>| 186-0355 or 14700. It may help in your =
quest for=20
brushes! If you need a<BR>| replacement we sell the complete =
set up:=20
belt, alt. mounts brackets and<BR>| hardware for $245.00. I agree =
expensive=20
by automotive standards!<BR>| Good Luck,<BR>| Mahlon<BR>|<BR></DIV>
<DIV>Mahlon also sent the following:</DIV>
<DIV> </DIV>
<DIV><BR>| Hi Ronnie,<BR>| It depends on where your engine came from =
or what=20
application you are<BR>| trying to mimic.<BR>| Pipers used Mopar and =
Prestolite on O-320's<BR>| Cessna used Ford on O-320's<BR>| Beech =
used Ford=20
and Prestolite on O-320's<BR>| Can't remember what Bellanca =
and some=20
of the others used but basically they<BR>| all used some version of =
Ford,=20
Prestolite or Mopar. To further complicate<BR>| things the mounting =
brackets=20
and ring gear support assemblies were<BR>| different for each of the =
installations. IE belt that fit a ford alt.<BR>| pulley =
doesn't fit a=20
MOPAR flywheel and same thing for the mounting<BR>| brackets. You =
really=20
need to know what brackets and what flywheel you have<BR>| to make =
the=20
correct determination of what's the right Alternator. If you<BR>| =
let me=20
know what you have I will try to check it out for you On Monday =
when<BR>| I=20
am back in the shop. If you are totally confused feel free to call =
me=20
at<BR>| 1-800-624-6680 ext 305 and maybe I can better explain =
verbally.<BR>|=20
Anyway I hope this helps,<BR>| Mahlon Russell<BR>|<BR><BR>Time: =
12:37:48 PM=20
PST US<BR>From: "Jim and Bev Cone" <<A=20
href=3D"mailto:jimnbev@olypen.com"><FONT=20
size=3D3>jimnbev@olypen.com</FONT></A><FONT =
size=3D3>><BR>Subject: RV-List:=20
Alternator<BR><BR>--> RV-List message posted by: "Jim and Bev =
Cone"=20
<</FONT><A href=3D"mailto:jimnbev@olypen.com"><FONT=20
size=3D3>jimnbev@olypen.com</FONT></A><FONT size=3D3>><BR><BR>The =
Pelican=20
alternator sold by ACS is off of a Chevy Sprint<BR>Spectrum. =
It is a=20
small 65 amp alternator that is self regulating and has=20
automatic<BR>overheat protection that resets when an overheated =
condition is=20
resolved.<BR>I have one and it works well.<BR><BR>Jim =
Cone<BR></FONT></DIV>
<DIV><FONT size=3D3>Another post from kr shultz" <<A=20
=
href=3D"mailto:sfg0152002@yahoo.com">sfg0152002@yahoo.com</A></FONT></DIV=
>
<DIV><FONT size=3D3>Think it is a Suzuki Samurai 1995 to =
2001</FONT></DIV>
<DIV><FONT size=3D3></FONT> </DIV>
<DIV><FONT size=3D3><FONT=20
size=3D2></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE></FONT></FONT></BOD=
Y></HTML>
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