Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Sun, 09 Nov 2003 19:21:00 -0500 Message-ID: X-Original-Return-Path: Received: from albatross.mail.pas.earthlink.net ([207.217.120.120] verified) by logan.com (CommuniGate Pro SMTP 4.1.6) with ESMTP id 2716232 for flyrotary@lancaironline.net; Sun, 09 Nov 2003 10:19:34 -0500 Received: from user-2injouu.dialup.mindspring.com ([165.121.227.222] helo=Carol) by albatross.mail.pas.earthlink.net with smtp (Exim 3.33 #1) id 1AIrLb-0001uV-00 for flyrotary@lancaironline.net; Sun, 09 Nov 2003 07:19:28 -0800 X-Original-Message-ID: <004901c3a6d4$d1c3bf10$0000a398@Carol> From: "sqpilot@earthlink" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Murphy's law of precautionary landings X-Original-Date: Sun, 9 Nov 2003 09:19:06 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0046_01C3A6A2.862C9F90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 This is a multi-part message in MIME format. ------=_NextPart_000_0046_01C3A6A2.862C9F90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Jim Sower=20 To: Rotary motors in aircraft=20 Sent: Sunday, November 09, 2003 12:05 AM Subject: [FlyRotary] Re: Murphy's law of precautionary landings <... The alternator is 100A ....>=20 It makes sense that there might be a "spike" of output from time to = time (particularly just as the unit comes on line). Since the = alternator B+ cable for that unit should be awg 4 or 6 (minimum) and the = purpose of the fuze is protecting the adjacent wires in the harness from = collateral damage if the B+ shorts and tries to melt down, a 130-140 A = fuze wouldn't be the least unreasonable.=20 <... My leading theory is fatigue ...>=20 My guess is that if the fuze near the break is all smoky looking it's = not fatigue :o)=20 <... fuse is flimsy ....>=20 I'm trying to visualize a dainty, flimsy 100 amp fuze. Help me out = here :o)=20 I'm going with a fusible link or more likely, a huge spade/blade fuze = (like the smaller ones in the late model cars) for my application. It = will be no more than 6" or 8" from the alternator.=20 My best guess ... Jim S.=20 =20 Russell Duffy wrote:=20 The alternator is 100A, and I originally wondered if a 100A fuse = would be enough. As you mentioned, I had a larger fuse than the = alternator rating on my RV-8. ... My leading theory is fatigue. ... = The fuse is flimsy, and I have a bracket built to keep it from flexing. Hi, everyone....Paul Conner here....I purchased a 70 amp reset type = circuit breaker for my alternator from Aircraft Spruce. Any thoughts = about the suitability of using this for my alternator instead of a fuse? = My thinking was that if it "blew the fuse" at some remote location, I = wouldn't have to search all thru my aircraft for that spare fuse. Just = fix the problem and reset the circuit breaker. Comments or suggestions? = Thanks. Paul Conner ------=_NextPart_000_0046_01C3A6A2.862C9F90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 Jim=20 Sower
Sent: Sunday, November 09, 2003 = 12:05=20 AM
Subject: [FlyRotary] Re: = Murphy's law of=20 precautionary landings

<... The = alternator is=20 100A ....>
It makes sense that there might be = a "spike" of=20 output from time to time (particularly just as the unit comes on = line). =20 Since the alternator B+ cable for that unit should be awg 4 or 6 = (minimum) and=20 the purpose of the fuze is protecting the adjacent wires in the = harness from=20 collateral damage if the B+ shorts and tries to melt down, a 130-140 A = fuze=20 wouldn't be the least unreasonable.=20

<... My leading theory = is fatigue=20 ...>
My guess is that if the fuze near the break is all = smoky looking=20 it's not fatigue :o)=20

<...  fuse is = flimsy=20 ....>
I'm trying to visualize a dainty, flimsy 100 amp = fuze. =20 Help me out here :o)
I'm going with a fusible link or more likely, a huge = spade/blade=20 fuze (like the smaller ones in the late model cars) for my = application. =20 It will be no more than 6" or 8" from the = alternator.=20

My best guess ... Jim = S.=20
 =20

Russell Duffy wrote:=20

  The alternator is 100A, and I originally wondered if = a 100A=20 fuse would be enough.  As you mentioned, I had a larger fuse = than the=20 alternator rating on my RV-8.  ...  My leading theory is = fatigue.=20 ... The fuse is flimsy, and I have a bracket built to keep it from=20 flexing.
 
Hi,=20 everyone....Paul Conner here....I purchased a 70 amp reset type = circuit=20 breaker for my alternator from Aircraft Spruce.  Any thoughts = about the=20 suitability of using this for my alternator instead of a fuse?  = My=20 thinking was that if it "blew the fuse" at some remote location, I = wouldn't=20 have to search all thru my aircraft for that spare fuse.  Just = fix the=20 problem and reset the circuit breaker.  Comments or = suggestions? =20 Thanks.  Paul=20 Conner
= ------=_NextPart_000_0046_01C3A6A2.862C9F90--