X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtpauth08.mail.atl.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 988172 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 00:56:16 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=CBarber@TexasAttorney.net Received: from [24.238.245.19] (helo=Notebook) by smtpauth08.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1DfsbC-0002Jw-BS for flyrotary@lancaironline.net; Wed, 08 Jun 2005 00:55:30 -0400 From: "Christopher Barber" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Electric fan to assist cooling Date: Tue, 7 Jun 2005 23:55:18 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_04E6_01C56BBC.62605030" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal X-ELNK-Trace: 1d70e58d8d65c1bfb880f9431927b0049ef193a6bfc3dd488760075bb231a88f84f69bc3c2478e91666fa475841a1c7a350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 24.238.245.19 This is a multi-part message in MIME format. ------=_NextPart_000_04E6_01C56BBC.62605030 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit MessageWell, PL suggest that he may not mind using NACA scoops IF'N you put small fans in the NACA's to draw the air in. Looks simple enough in the diagrams he provided. I have considered it since the NACA's are part of the "per-plans" of my Velocity kit and are already installed in the roof. All the best, Chris -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy Sent: Tuesday, June 07, 2005 11:23 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Electric fan to assist cooling 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? Hi Greg, 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. Rusty (hoping the risk analysis goes away soon) ------=_NextPart_000_04E6_01C56BBC.62605030 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Well,=20 PL suggest that he may not mind using NACA scoops IF'N you put small = fans in the=20 NACA's to draw the air in.  Looks simple enough in the diagrams he=20 provided. I have considered it since the NACA's are part of the = "per-plans" of=20 my Velocity kit and are already installed in the = roof.
 
All=20 the best,
 
Chris
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Russell=20 Duffy
Sent: Tuesday, June 07, 2005 11:23 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Electric fan to = assist=20 cooling

Has anyone tried using electric fans for additional = cooling=20 when on the gound and climb the similar to what cars use?  Any = thoughts=20 on 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=20 into the electrical system actually shut down the EC-2 for about = a=20 second.  I never tried to analyze whether it was a positive or = negative=20 surge, but I have to guess it was negative.  It might be OK = one way=20 or the other, but I got that fan off immediately, just to make = sure I=20 never experienced that surge in-flight.
 
Rusty (hoping the risk = analysis goes away=20 soon)
 
   



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