X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 931391 for flyrotary@lancaironline.net; Wed, 18 Jan 2006 10:40:21 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.33; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao06.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20060118153648.HVVF20050.fed1rmmtao06.cox.net@BigAl> for ; Wed, 18 Jan 2006 10:36:48 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: LS1 coil failures Date: Wed, 18 Jan 2006 07:39:45 -0800 Message-ID: <000001c61c45$694c3140$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C61C02.5B28F140" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C61C02.5B28F140 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: Coil & Alt cooling, Buly's input shaft =20 I'm wondering if 180f under hood is really the main cause for coil fail? Auto's shut off hot in desert, black steel hood, must see temps way = beyond anything we can throw at them. You can't get those puppies to fail regardless of environment. Perhaps there are one or two other = significant causes. I'd be real quick to abandon that manufacturer. =20 There are coils; and then there are coils with built-in solid state components like the LS1. Still, you'd expect these components to be = good to about 150C (300F). The alternator of course also has solid-state = components in the rectifier circuit. Makes you wonder why Tracy's coils are = failing, and not the alternator. =20 This issue is of definite interest to me as the LS1 coils on my 20B are = in a similar setup as Tracy's. My coils are in the path of the exit air from = the radiator. I have assumed that air would typically be about 150F or = less. Won't know until this thing flies. =20 Al ------=_NextPart_000_0001_01C61C02.5B28F140 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Re: Coil & Alt cooling, Buly's input shaft

 

I'm wondering if 180f under hood is really the main cause for coil fail? = Auto's shut off hot in desert, black steel hood, must see temps way beyond = anything we can throw at them. You can't get those puppies to fail regardless of environment. Perhaps there are one or two other significant causes. I'd = be real quick to abandon that manufacturer.

 <= /font>

There are coils; and then there = are coils with built-in solid state components like the LS1.  Still, = you’d expect these components to be good to about 150C (300F).  The = alternator of course also has solid-state components in the rectifier = circuit.  Makes you wonder why Tracy’s coils are failing, and not the = alternator.

 

This issue is of definite = interest to me as the LS1 coils on my 20B are in a similar setup as Tracy’s. = My coils are in the path of the exit air from the radiator.  I have = assumed that air would typically be about 150F or less.  Won’t know = until this thing flies.

 

Al

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