X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f204.google.com ([209.85.221.204] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682867 for flyrotary@lancaironline.net; Mon, 15 Jun 2009 10:43:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.204; envelope-from=rwstracy@gmail.com Received: by qyk42 with SMTP id 42so4712491qyk.7 for ; Mon, 15 Jun 2009 07:43:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=yMyOzEtnjvtMT2WATWEQXBUZgMAcYCbTkIvNkc22Vpw=; b=n3xxMdHc3ISLEXgW7/9lRSAxyq3p1Alj55fEzO0KTBHxYj2N5x2PDQeaAsNygaCsMW KoHOAue0j8cTZ4KgQFyYEG0vvMbnb9yPXPpgfHux8NSWokpgARoigcua10Z41XRmrMKo PPSLp2Xe0wQ7y1/53xH0qZftAdVGtz4pGS33I= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=hT09mstAMwfTn6Ol8T0bexLrr2KfXG9Y48uGNkAcUhXQ1FBKrl7jlvlGUeuelhNgdo Zzd6KcLb/U//Po4PDmYDnqbqf7zGF3NGVlGRGXrw2wLOPl5G2qmWPdEOKkmt8GfjwFoy PwD8omdS0ObfQQhVLVwwZefriBtcuBiUchcHE= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.54.5 with SMTP id o5mr7223591qag.381.1245076994381; Mon, 15 Jun 2009 07:43:14 -0700 (PDT) In-Reply-To: References: Date: Mon, 15 Jun 2009 10:43:14 -0400 X-Google-Sender-Auth: 30af10a865e1fded Message-ID: <1b4b137c0906150743x7a41d353i4a24a42bb2bbea02@mail.gmail.com> Subject: Re: [FlyRotary] Re: A big win! From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175cde72f7d920046c64139f --0015175cde72f7d920046c64139f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit I assume we are talking about AREA? Cowl would explode if only 80% of intake air made it out : ) This is a highly conditional subject. If you look at some of the fastest RV's (Dave Anders, Tracy Sailor, Rich Jankowski, etc, the outlet area is LESS than the inlets. All depends on what you are optimizing, how good are your ducts & diffusers, etc. Tracy (crook, not sailor) On Mon, Jun 15, 2009 at 2:53 AM, Al Gietzen wrote: > Don said: > > The conventional wisdom is that the discharge air from the > cowl needs to be about 80% of the incoming air. > ---------------- > > This is only "conventional wisdom" of those that believe air contracts when > it is heated. For the rest it is about 130%. > > Al > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --0015175cde72f7d920046c64139f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I assume we are talking about AREA?=A0 Cowl would explode if only 80% of in= take air made it out : )=A0=A0 This is a highly conditional subject.=A0 If = you look at some of the fastest RV's (Dave Anders, Tracy Sailor, Rich J= ankowski, etc, the outlet area is LESS than the inlets.=A0 All depends on w= hat you are optimizing,=A0 how good are your ducts & diffusers, etc.
Tracy (crook, not sailor)

On Mon, Jun= 15, 2009 at 2:53 AM, Al Gietzen <ALVentures@cox.net> wrote:
Don said:

The conventional wisdom is that the discharge air from the
cowl needs to be about 80% of the incoming air.
----------------

This is only "conventional wisdom" of those that believe air cont= racts when
it is heated. =A0For the rest it is about 130%.

Al


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