Return-Path: <canarder@frontiernet.net>
Received: from relay01.roc.ny.frontiernet.net ([66.133.182.164] verified)
  by logan.com (CommuniGate Pro SMTP 4.3c1)
  with ESMTP id 743913 for flyrotary@lancaironline.net; Fri, 18 Feb 2005 00:15:41 -0500
Received-SPF: pass
 receiver=logan.com; client-ip=66.133.182.164; envelope-from=canarder@frontiernet.net
Received: from filter03.roc.ny.frontiernet.net (filter03.roc.ny.frontiernet.net [66.133.183.70])
	by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id B8DBF364E30
	for <flyrotary@lancaironline.net>; Fri, 18 Feb 2005 05:14:56 +0000 (UTC)
Received: from relay01.roc.ny.frontiernet.net ([66.133.182.164])
	by filter03.roc.ny.frontiernet.net (filter03.roc.ny.frontiernet.net [66.133.183.70]) (amavisd-new, port 10024)
	with LMTP id 18406-13-74 for <flyrotary@lancaironline.net>;
	Fri, 18 Feb 2005 05:14:56 +0000 (UTC)
Received: from [127.0.0.1] (67-137-75-55.dsl2.cok.tn.frontiernet.net [67.137.75.55])
	by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id 17A73364AB2
	for <flyrotary@lancaironline.net>; Fri, 18 Feb 2005 05:14:55 +0000 (UTC)
Message-ID: <421579C6.8040905@frontiernet.net>
Date: Thu, 17 Feb 2005 23:14:46 -0600
From: Jim Sower <canarder@frontiernet.net>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: I found the power
References: <list-743618@logan.com>
In-Reply-To: <list-743618@logan.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-Antivirus: avast! (VPS 0507-3, 02/17/2005), Outbound message
X-Antivirus-Status: Clean
X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter03.roc.ny.frontiernet.net

And just how might you massage those numbers to adapt them to a pusher?

David Carter wrote:

>Rather than NACA, might consider a "speed mod" described in book "Speed with
>Economy" by Kent Paser, Paser Publications, 5672 West Chesnut Ave,
>Littleton, Colorado 80123 (1994), Chapter 3, Engine Intake System
>Modifications, starting page 52, ". . . use of propellor pressure pulses to
>augment the ram air flow into the cowl carb air scoop." . . . ". . .the
>scoop was extended forward about 8 inches, and the scoop opening was
>rounded-off with an inlet area reduced to about 1.5 times that required for
>sufficient flow to the carburetor. . . the scoop clears the propellor by
>only 5/8 of an inch, with an inlet area only 10% larger than the venturi
>throat area of the carburetor. . . .The scoop inlet is . . .about a 10
>degree angle into the advancing propellor blade. . .the sides of this inner
>liner diverge at less than an 11 degree total angle.  Any larger . . .and
>the scoop would go turbulent"
>
>David Carter
>
>  
>
>  
>