Return-Path: Received: from seraph3.grc.nasa.gov ([128.156.10.12] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2752976 for flyrotary@lancaironline.net; Thu, 20 Nov 2003 07:56:10 -0500 Received: from lombok-fi.grc.nasa.gov (lombok-fi.grc.nasa.gov [139.88.112.33]) by seraph3.grc.nasa.gov (Postfix) with ESMTP id B16A06BB07 for ; Thu, 20 Nov 2003 07:56:09 -0500 (EST) Received: from apataki-fi.grc.nasa.gov (apataki-fi.grc.nasa.gov [139.88.112.35]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id hAKCu9Qx001798 for ; Thu, 20 Nov 2003 07:56:09 -0500 (EST) Received: from GR7700002171.lerc.nasa.gov (gr7700002171.grc.nasa.gov [139.88.139.35]) by apataki-fi.grc.nasa.gov (8.12.10 GRC/8.12.10) with ESMTP id hAKCu8id019674 for ; Thu, 20 Nov 2003 07:56:08 -0500 (EST) X-Info: ODIN / NASA Glenn Research Center Message-Id: <5.1.1.5.2.20031120074808.016ddc68@popserve.lerc.nasa.gov> X-Sender: scberki@popserve.lerc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Thu, 20 Nov 2003 07:56:07 -0500 To: "Rotary motors in aircraft" From: Joseph M Berki Subject: Re: [FlyRotary] Re: radiator size In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed I guess we are trying to find the edge of the envelope. Charlie Airesman is using a small rad and a NACA duct with an augmenter and is doing over 200 mph with a 4 to 5g/h fuel burn. On the pusher, we can optimize the duct length. The augmenter will be tricky with the rotary. Ed provided some btu numbers to start with. Thanks Joe Berki Limo EZ At 03:27 PM 11/19/2003 -0600, you (Jim Sower) wrote: >Isn't the conventional wisdom 3 cuin/hp? Al Wick's Subaru is about 2.5 >but his >Soob doesn't have the cooling requirements of a rotary and I believe he has a >really nice (efficient - good recovery) plenum. I would think 3 minimum >unless >you have really good ducting and plenum. >Just a theory ... Jim S.