X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 28 Nov 2005 11:00:48 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m26.mx.aol.com ([64.12.137.7] verified) by logan.com (CommuniGate Pro SMTP 5.0.2) with ESMTP id 848768 for lml@lancaironline.net; Mon, 28 Nov 2005 10:35:58 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.7; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m26.mx.aol.com (mail_out_v38_r6.3.) id q.23e.270016e (48576); Mon, 28 Nov 2005 10:34:27 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <23e.270016e.30bc7d83@aol.com> X-Original-Date: Mon, 28 Nov 2005 10:34:27 EST Subject: Re: [LML] X-Original-To: lml@lancaironline.net X-Original-CC: warbirdaeropress@cox MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1133192067" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1133192067 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 11/28/2005 9:12:45 A.M. Central Standard Time, warbirdaeropress@cox.net writes: Ok - the problem... At Reno this year, I ran around the pylons at 3000 rpm for racing. During the flight on Saturday, a 5 amp CB popped. Since then, at higher rpm (2500 and up) it will pop in about 10 to 15 seconds. This, I take it, is the alternator field cb. The battery does not charge when this cb is popped. Is this an alternator, voltage regulator, CB, or other issue? I didn't build the airplane, and there is no detailed wiring schematic. Scotty, Hmmmmm, sounds like it's time to trace out the wires to unlabeled breakers and identify them. How about a call to the builder? Do you suspect a short when there is hi rpm induced vibration? Since the field voltage is managed by the regulator, that makes it suspect. Is there more than one wire coming off the breaker? If you trace the wire(s), is there contact with metal grounded parts or possible chafing thru to another wire in the bundle? With the breaker pulled, you could trace the wire(s) with an ohm meter from the breaker to where ever. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) -------------------------------1133192067 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 11/28/2005 9:12:45 A.M. Central Standard Time,=20 warbirdaeropress@cox.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Ok - the=20 problem... At Reno this year, I ran around the pylons at 3000 rpm for raci= ng.=20 During the flight on Saturday, a 5 amp CB popped. Since then, at higher rp= m=20 (2500 and up) it will pop in about 10 to 15 seconds. This, I take it, is t= he=20 alternator field cb. The battery does not charge when this cb is=20 popped.

Is this an alternator, voltage regulator, CB, or other issu= e? I=20 didn't build the airplane, and there is no detailed wiring=20 schematic.
Scotty,
 
Hmmmmm, sounds like it's time to trace out the wires to unlabeled break= ers=20 and identify them.  How about a call to the builder? 
 
Do you suspect a short when there is hi rpm induced vibration?  Si= nce=20 the field voltage is managed by the regulator, that makes it suspect.&n= bsp;=20 Is there more than one wire coming off the breaker?  If you trace=20= the=20 wire(s), is there contact with metal grounded parts or possible chafing thru= to=20 another wire in the bundle?
 
With the breaker pulled, you could trace the wire(s) with an ohm meter=20= from=20 the breaker to where ever.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)



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