X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f227.google.com ([209.85.218.227] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3860174 for flyrotary@lancaironline.net; Sun, 20 Sep 2009 10:44:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.227; envelope-from=lehanover@gmail.com Received: by bwz27 with SMTP id 27so1506377bwz.19 for ; Sun, 20 Sep 2009 07:43:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=tA4Zdq1nQyEQgaOwTcWbF178sksrblIhW54ikpcebOE=; b=OrEGw7fKRUK93AmzwZTNkFsRtlwutrrtMoUQe6Ivq3WE5ZKbB63sqAHScbZAUwK0Oz FVc/nZyhFSiadVoW4+XVFG+3JJ7Ipt6U+k7YqmGsTlHPuVUMQMJq+nDGHX/r9BFtPzxG oLTCuCEB1MH2FOuhIwVxjkUrc88trz3t2hEOU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=Jx+HGhXAqk+FSGyg7kgbWOnmh7o+ZR2SlK6uUX9JdaDpU6jeXPAyYCgWnUhj/PqD5x Cy4SBBAxd8Ndn3uVDhZQOqH62s6mD9fSiUUA3xzCK7FCp0SqGy6I+tmPXdjm9Knzjc02 j3fd31z48eohMp1bybOattYK9xKdQUV95sZc0= MIME-Version: 1.0 Received: by 10.204.34.201 with SMTP id m9mr3374207bkd.77.1253457810584; Sun, 20 Sep 2009 07:43:30 -0700 (PDT) Date: Sun, 20 Sep 2009 10:43:30 -0400 Message-ID: <1ab24f410909200743p654a119fg1749a56a364bd112@mail.gmail.com> Subject: Vortex Generators From: Lynn Hanover To: flyrotary@lancaironline.net Content-Type: multipart/alternative; boundary=0003255550f28a74b804740363c8 --0003255550f28a74b804740363c8 Content-Type: text/plain; charset=ISO-8859-1 One builder on the RV list said he got a big improvement in cooling by installing VGs on the trailing edge of the cooling outlet. This is so non-intuitive that I can't imagine why it would work but its so easy to try I might have to do it while scratching my head. Tracy Vortex generators generate vortexes. Spinning part of the airflow causing it to travel a greater distance in the same time as surounding flow, So, higher velocity, So, lower pressure (Bernoulli). The pressure differential between the inside of the cowl and the exit is increased. Lynn E. Hanover --0003255550f28a74b804740363c8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
One builder on the RV list said he got a big improvement in cooling by= installing VGs on the trailing edge of the cooling outlet.=A0 This is so n= on-intuitive that I can't imagine why it would work but its so easy to = try I might have to do it while scratching my head.

Tracy
=A0
Vortex generators generate vortexes. Spinning part of the airflow caus= ing it to travel a greater distance in the same time as surounding flow, So= , higher velocity, So, lower pressure (Bernoulli). The pressure differentia= l between the inside of the cowl and the exit is increased.
=A0
Lynn E. Hanover
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