Return-Path: Received: from [65.54.169.107] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2b5) with ESMTP id 142326 for flyrotary@lancaironline.net; Mon, 07 Jun 2004 00:56:28 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 6 Jun 2004 21:44:39 -0700 Received: from 4.174.4.85 by bay3-dav77.bay3.hotmail.com with DAV; Mon, 07 Jun 2004 04:44:39 +0000 X-Originating-IP: [4.174.4.85] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: LS1 Coils - amp draw? Date: Mon, 7 Jun 2004 00:44:39 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006B_01C44C28.9D188850" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.00.0013.2101 Seal-Send-Time: Mon, 7 Jun 2004 00:44:39 -0400 Message-ID: X-OriginalArrivalTime: 07 Jun 2004 04:44:39.0946 (UTC) FILETIME=[24A76EA0:01C44C4A] This is a multi-part message in MIME format. ------=_NextPart_000_006B_01C44C28.9D188850 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Sunday, June 06, 2004 4:08 PM Subject: [FlyRotary] Re: LS1 Coils - amp draw? The peak current draw on the LS1 coils is 9A EACH. This can happen = on startup before the EC2 can compute the proper dwell time. Average = amps is much lower during normal operation. Tracy (I hate fuses in airplane)=20 So do you have a breaker for your coils, or no protection at all (as = you suggest for the EC-20) ? Rusty (I like fuses, big ones that protect the wiring, and blow only = with good reason)=20 This isn't advice, just the way I chose to do it. I have only 1 breaker on the flight critical bus. If I have to shut = off anything on this bus I might as well shut everything off because = everything on this bus is needed to make the engine run. There are = separate switches for things like fuel pumps but no fuses. There is a = good argument to be made for separate breakers for lead & trail coils = however. =20 If a breaker blows, it is usually has a good reason. (including the = possibility that the builder put in one that was too small) Tracy ------=_NextPart_000_006B_01C44C28.9D188850 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From: Russell=20 Duffy
To: Rotary motors in = aircraft
Sent: Sunday, June 06, 2004 = 4:08 PM
Subject: [FlyRotary] Re: LS1 = Coils - amp=20 draw?

The peak current draw on the LS1 coils is 9A EACH.   = This can=20 happen on startup before the EC2 can compute the proper dwell = time. =20 Average amps is much lower during normal operation.
 
Tracy  (I hate fuses in airplane) 
 
So=20 do you have a breaker for your coils, or no protection at = all (as=20 you suggest for the EC-20) ?
 
Rusty (I like fuses, big ones that protect the wiring, = and blow=20 only with good reason) 
 
This isn't advice, just the way = I chose to=20 do it.
 
I have only 1 breaker on = the flight=20 critical bus.  If I have to shut off anything on this bus I might = as well=20 shut everything off because everything on this bus is needed to make = the=20 engine run.  There are separate switches for things like fuel = pumps but=20 no fuses.  There is a good argument to be made for separate = breakers for=20 lead & trail coils however. 
 
If a breaker blows, it is = usually has=20 a good reason.  (including the possibility that the builder put = in one=20 that was too small)
 
Tracy=20
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