X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm15-vm0.access.bullet.mail.mud.yahoo.com ([66.94.236.17] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with SMTP id 5038795 for flyrotary@lancaironline.net; Thu, 30 Jun 2011 17:53:16 -0400 Received-SPF: softfail receiver=logan.com; client-ip=66.94.236.17; envelope-from=echristley@nc.rr.com Received: from [66.94.237.192] by nm15.access.bullet.mail.mud.yahoo.com with NNFMP; 30 Jun 2011 21:52:41 -0000 Received: from [66.94.237.96] by tm3.access.bullet.mail.mud.yahoo.com with NNFMP; 30 Jun 2011 21:52:41 -0000 Received: from [127.0.0.1] by omp1001.access.mail.mud.yahoo.com with NNFMP; 30 Jun 2011 21:52:41 -0000 X-Yahoo-Newman-Id: 706027.88045.bm@omp1001.access.mail.mud.yahoo.com Received: (qmail 83861 invoked from network); 30 Jun 2011 21:52:41 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1309470761; bh=puquZLEBOqt9ALALYkOEKSXTD3KdcT50rfnSiuN99as=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:Date:From:Reply-To:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=obPE4bxxyR2qeNcyvv8wuZm6gwg+xB85rM9BioPFL0jaYIlKKaY7E0z/DzMNl21F8vKHTrQkRFopsU6HUvxGdUQhlwE9HLM2C0j8yvQ8yYML82ecs1HwgyrVsa27S9x8mXXrFF16vopsPxhsjET1qTcbx3bmLOm8na7tvmbpI8Q= Received: from [192.168.1.2] (echristley@65.190.53.180 with plain) by smtp101.sbc.mail.bf1.yahoo.com with SMTP; 30 Jun 2011 14:52:40 -0700 PDT X-Yahoo-SMTP: 40RP3pGswBDvPav1a.I8eMv.KS8bdgWBnCloVoKaow-- X-YMail-OSG: grfG.J0VM1nvW614TmETwZo5X7PS1tcgSTis8ycYTUT3MwN PLKNRuKmTYtM9ALT7_GJnRAbfSqSLEdBOtkOXXdYJujXslJP.Li69BOQURTO pp.xtoflxOC_ItkgvIanHtDsPC8.n7k.HD8iv5uICkU73mJ9xUE8_K.7mcT4 XHI22tAbax00_C9DlIFgKt1F9uZLCBq3F1KvWQO6kl6BhnU3nSyTVNnZOWjx OtKNIbbNixDc2AXlSUAyZ9H1K_loqcs7lOAdM0G6K2QMQyCg2sNPkZPOXnOD Kf2WAhagkoIIuQeFe49uzgm8V7yFCnRQJERJCI7AMiKrybJB8A6me.Sy6u6M jSmg- X-Yahoo-Newman-Property: ymail-3 Message-ID: <4E0CEFC2.5090905@nc.rr.com> Date: Thu, 30 Jun 2011 17:50:58 -0400 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110424 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Test prop/club needed References: In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit On 06/30/2011 02:14 AM, Andrew Martin wrote: > Ernest, I thought the calculation for a test club was X section = > 1/15th of length, means a 90mm square should be 1350mm or 54” in your > language. mine is 90x1350mm calculated to absorb 190hp@2450rpm. do I > have this wrong, or do you have a more up to date equation? only > problem I can see with using a test club is needing supplemental air > for the heat exchangers or very short runs. > I used the attached spreadsheet. Nawh, you got it right. I left mine long for two reason 1) I wasn't sure of the length when I was cutting. 2) I'd rather have it absorbing more than necessary, and then sneak up on the proper length.