X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3700798 for flyrotary@lancaironline.net; Tue, 23 Jun 2009 11:27:47 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090623152710.FQYJ18948.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Tue, 23 Jun 2009 11:27:10 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo01.cox.net with bizsmtp id 7TT91c00D3uzsQg03TT9r0; Tue, 23 Jun 2009 11:27:09 -0400 X-VR-Score: -20.00 X-Authority-Analysis: v=1.0 c=1 a=wXc53L2h46gA:10 a=Q2IFH-yt5vA7qTyw5V4A:9 a=2odmRuuVj44Bb63HWhOlXh9w02UA:4 a=Q_-_wJwfjTKS9lgSbokA:9 a=k_xMUpP-_f7p88lQV9kA:7 a=cuY-5pJeZuRwRjFCBwsEBZXXYQsA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Overvoltage solved - tip to remember if yours goes bad Date: Tue, 23 Jun 2009 08:27:22 -0800 Message-ID: <5F4F736ED2634016A10CA7F8D3960D1D@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C9F3DC.6E4EC320" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Importance: Normal Thread-Index: AcnxXRyMIUDVlp8ISzOLpttEb10G8wCwNbwg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C9F3DC.6E4EC320 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Overvoltage solved - tip to remember if yours goes = bad =20 I am pretty sure I solved my overvoltage issue. I drowned the = alternator with electrical contact cleaner and after it dried I started it up. = Voltage was now reading 14.0-14.2 volts and it stayed that way throughout a = couple of flights. That is down from 14.5 to 14.8 volts which was setting off = the alarm on the previous flight (verified with 2 volt meters. Hi, Dave; =20 I'm trying to figure how the contact cleaner affects the output voltage. = You know; typical engineer, I don't just want to know it worked, I want to = know WHY it worked. The only contacts in there are the brushes; which should = not affect the voltage regulator. Maybe there was a coating of dirt on the regulator which made it run hotter, which could affect the voltage. But when I had a similar problem, and replaced the regulator, I didn't find = the one I removed to be dirty. =20 Be interesting to see if the fix continues. =20 Al G =20 P.S. Getting the smoke system installed? ------=_NextPart_000_0006_01C9F3DC.6E4EC320 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Overvoltage solved - tip to remember if yours goes bad

I am pretty sure I solved my overvoltage = issue. I drowned the alternator with electrical contact cleaner and after = it dried I started it up. Voltage was now reading 14.0-14.2 volts and = it stayed that way throughout a couple of flights. That is down from = 14.5 to 14.8 volts which was setting off the alarm on the previous = flight (verified with 2 volt meters.

Hi, Dave;=

I’m trying to figure how = the contact cleaner affects the output voltage. You know; typical engineer, = I don’t just want to know it worked, I want to know WHY it worked. The only = contacts in there are the brushes; which should not affect the voltage regulator. = Maybe there was a coating of dirt on the regulator which made it run hotter, = which could affect the voltage. But when I had a similar problem, and = replaced the regulator, I didn’t find the one I removed to be = dirty.

Be interesting to see if the fix continues.

Al G

P.S. Getting the smoke = system installed?

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