X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 988169 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 00:24:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=13brv3@bellsouth.net Received: from ibm69aec.bellsouth.net ([65.6.194.9]) by imf25aec.mail.bellsouth.net with ESMTP id <20050608042319.YKTO22513.imf25aec.mail.bellsouth.net@ibm69aec.bellsouth.net> for ; Wed, 8 Jun 2005 00:23:19 -0400 Received: from rd ([65.6.194.9]) by ibm69aec.bellsouth.net with ESMTP id <20050608042319.VZJO13045.ibm69aec.bellsouth.net@rd> for ; Wed, 8 Jun 2005 00:23:19 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Electric fan to assist cooling Date: Tue, 7 Jun 2005 23:23:19 -0500 Message-ID: <000a01c56be1$ccf5ed90$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C56BB7.E4225690" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C56BB7.E4225690 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Has anyone tried using electric fans for additional cooling when on the gound and climb the similar to what cars use? Any thoughts on effectiveness? =20 Hi Greg, =20 I had a bad reaction with the fan I had on the RV-3 initially. When it = was off, I had the switch set up so it would short the wires together. This supposedly adds some braking action, to keep it from freewheeling. = Well, it didn't work that way. The fan spun quite rapidly from the prop blast, = and when I actually turned it on, the voltage surge it put into the = electrical system actually shut down the EC-2 for about a second. I never tried to analyze whether it was a positive or negative surge, but I have to guess = it was negative. It might be OK one way or the other, but I got that fan = off immediately, just to make sure I never experienced that surge in-flight. =20 Rusty (hoping the risk analysis goes away soon) =20 =20 ------=_NextPart_000_000B_01C56BB7.E4225690 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Has anyone tried using electric fans for additional = cooling when=20 on the gound and climb the similar to what cars use?  Any thoughts = on=20 effectiveness?

 
Hi=20 Greg,
 
I had a = bad reaction=20 with the fan I had on the RV-3 initially.  When it was off, I=20 had the switch set up so it would short the wires together.  = This=20 supposedly adds some braking action, to keep it = from freewheeling. =20 Well, it didn't work that way.  The fan spun quite = rapidly from=20 the prop blast, and when I actually turned it on, the voltage surge it = put into=20 the electrical system actually shut down the EC-2 for about a = second. =20 I never tried to analyze whether it was a positive or negative = surge, but I=20 have to guess it was negative.  It might be OK one way or the = other, but=20 I got that fan off immediately, just to make sure I never = experienced that=20 surge in-flight.
 
Rusty (hoping the risk analysis = goes away=20 soon)
 
   



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