Return-Path: Received: from [65.54.169.117] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3228845 for flyrotary@lancaironline.net; Wed, 12 May 2004 12:08:58 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 May 2004 09:08:58 -0700 Received: from 4.171.174.66 by bay3-dav87.bay3.hotmail.com with DAV; Wed, 12 May 2004 16:08:57 +0000 X-Originating-IP: [4.171.174.66] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Alternator pulley size Date: Wed, 12 May 2004 12:08:54 -0400 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0004_01C43819.E5500120" Message-ID: X-OriginalArrivalTime: 12 May 2004 16:08:58.0031 (UTC) FILETIME=[6E7083F0:01C4383B] ------=_NextPart_001_0004_01C43819.E5500120 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message ----- From: Mark Steitle Sent: Wednesday, May 12, 2004 11:57 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Alternator pulley size At 11:45 AM 5/12/2004 -0400, you wrote: =20 ----- Original Message ----- =20 From: Bill Dube =20 Sent: Wednesday, May 12, 2004 10:24 AM =20 To: Rotary motors in aircraft =20 Subject: [FlyRotary] Re: Alternator pulley size =20 At 09:29 PM 5/11/2004 -0400, you wrote: =20 >I found alternator from Prelude with much larger pulley than the stock =20 >Mazda. Don't Honda engines spin "backwards"? Will this be a problem whe= n =20 using a Honda alternator on a rotary? Not that a pulley cares which way it turns, but Alternators are AC device= s internally and don't care which way they turn either. A rectifier conv= erts AC to DC for the external world. =20 Tracy Don't some alternators have internal or external fans that need to turn a= specific direction in order to cool properly? Mark S. =20 Its possible that the fins on the centrifugal fans could be canted to opt= imize them for direction. A look at a sample in my junk pile looked symm= etrical so should work in either direction. =20 Hope everyone takes all comments made on this and every discussion group= in the spirit of "your mileage may vary". This stuff is not carved in = tablets of stone and should always be sanity checked for your application= Tracy =20 ------=_NextPart_001_0004_01C43819.E5500120 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
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----- Original Message -----
From: Mark Steitle
Sent: Wednesd= ay, May 12, 2004 11:57 AM
To: Rotary motors in aircraft
Subj= ect: [FlyRotary] Re: Alternator pulley size
 
At= 11:45 AM 5/12/2004 -0400, you wrote:

 
----- Original Message -----
F= rom: Bill Dube
Sent: Wednesday, May 12, 2004 10:24 AM
T= o: Rotary motors in aircraft
Subject: [FlyRotary] Re: Altern= ator pulley size


 
At 09:29 PM 5/11/2004 -0400, you= wrote:
>I found alternator from Prelude with much larger pulley = than the stock
>Mazda.



   &nbs= p;     Don't Honda engines spin "backwards"? Will thi= s be a problem when
using a Honda alternator on a rotary?

Not that a pulley cares which way it turns, but Alternators are AC devi= ces internally and don't care which way they turn either.  A rectifi= er converts AC to DC for the external world.

Tracy
=

Don't some alternators have internal or extern= al fans that need to turn a specific direction in order to cool properly?=

Mark S.

Its possible that the fins on the centrifugal fan= s could be canted to optimize them for direction.  A look at a = sample in my junk pile looked symmetrical so should work in either direct= ion. 

 Hope everyone takes all comments made on this an= d every discussion group in the spirit of "your mileage may vary". &= nbsp; This stuff is not carved in tablets of stone and should always be s= anity checked for your application.

Tracy 

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