Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Fri, 17 Oct 2003 19:24:32 -0400 Message-ID: X-Original-Return-Path: Received: from [24.93.67.84] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2640753 for flyrotary@lancaironline.net; Fri, 17 Oct 2003 14:26:16 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id h9HIQEuf002026 for ; Fri, 17 Oct 2003 14:26:15 -0400 (EDT) X-Original-Message-ID: <002201c394db$eba95e40$1702a8c0@WorkGroup> From: "Ed Anderson" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: LS1 Coil Fuse Value? X-Original-Date: Fri, 17 Oct 2003 14:24:36 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001F_01C394BA.645DC280" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001F_01C394BA.645DC280 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: Friday, October 17, 2003 10:11 AM Subject: [FlyRotary] Re: LS1 Coil Fuse Value? I'm using LS-1 coils and have my pair of leading coils running off = one fuse and the trailing coils running off another. What value of = fuses are working for the rest of you? I blew 5A's on both pairs today. Perry Casson I have mine all tied together, and there is no fuse. I'm not = necessarily recommending that, btw. =20 Remember, fuses don't protect the device, they protect the wire. The = maximum fuse size will be determined by the wire size you're using to = feed the coils. It's natural to try to size fuses so that they're just = large enough for the current that you expect, but you should resist this = urge to avoid nuisance trips, particularly when powering something as = important as ignition coils. =20 Cheers, Rusty (EWP's on the way- let the shipping entertainment begin) I know I'm considered back in the stone age by some, but I still will = not use a fuse on any flight critical circuit. I am well aware of the = argument that if something is wrong then a circuit breaker just becomes = an expensive fuse. But, in my 2000 hours of flying in the military, I = had a number of instances where a circuit beaker would pop - apparently = due to some temporary surge, short or whatever - but, I was able to = reset it and continue to use the equipment. Not every time by any = means, but a sufficient number of times that I prefer the circuit = breaker. I do use fuses on what I consider none-flight critical systems so not = against fuses per se, just feel they don't provide that "second chance" = just in case it was a termporary short or surge - like you caught your = foot in some wiring and caused a temporary short (I know shouldn't = happen), but then fuses shouldn't blow on flight critical stuff either. My 0.02 worth Ed Anderson ------=_NextPart_000_001F_01C394BA.645DC280 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
  ----- Original Message = -----
From:=20 Russell=20 Duffy
Sent: Friday, October 17, 2003 = 10:11=20 AM
Subject: [FlyRotary] Re: LS1 = Coil Fuse=20 Value?

 I'm using LS-1 coils and have my pair of = leading coils=20 running off one fuse and the trailing coils running off another.  = What=20 value of fuses are working for the rest of you?  I blew 5A's on = both=20 pairs today.

 Perry Casson

 
I have = mine all tied=20 together, and there is no fuse.  I'm not necessarily recommending = that,=20 btw.   
 
Remember, fuses don't=20 protect the device, they protect the wire.  The maximum fuse size = will be=20 determined by the wire size you're using to feed the coils.  It's = natural=20 to try to size fuses so that they're just large enough for the current = that=20 you expect, but you should resist this urge to avoid nuisance trips,=20 particularly when powering something as important as ignition = coils. =20
 
Cheers,
Rusty = (EWP's on the=20 way- let the shipping entertainment begin)
 
I know I'm considered =  back in=20 the stone age by some, but I still will not use a fuse on any flight = critical=20 circuit.  I am well aware of the argument that if something is = wrong then=20 a circuit breaker just becomes an expensive fuse.  But, in my = 2000 hours=20 of flying in the military, I had a number of instances where a circuit = beaker=20 would pop - apparently due to some temporary surge, short or = whatever -=20 but, I was able to  reset it and continue to use the=20 equipment.  Not every time by any means, but a sufficient number = of times=20 that I prefer the circuit breaker.
 
I do use fuses = on  what I=20 consider none-flight critical systems so not against fuses per se, = just feel=20 they  don't provide that "second chance" just in case it was a = termporary=20 short or surge - like you caught your foot in some wiring and caused a = temporary short (I know shouldn't happen), but then fuses shouldn't =  blow=20 on flight critical stuff either.
 
My 0.02 = worth
 
Ed = Anderson
 
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