X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f173.google.com ([209.85.216.173] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5137361 for flyrotary@lancaironline.net; Tue, 27 Sep 2011 02:06:49 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.173; envelope-from=david.staten@gmail.com Received: by qyc1 with SMTP id 1so535217qyc.4 for ; Mon, 26 Sep 2011 23:06:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=KsFNNInfS7tL+mMCYWpq7OFt/GOSs2kFkCTkgGH7wGo=; b=SVWHAYbDBvQewuXjF7w3+Y3Cb+ANGpNLyCw++S5/Srn8fAvLCucWfSvMda619H62S6 ECxTwfWyk9SFt5jfmmVpI5PPG8XCUyHs1ccq6RzSZALTseGpvOLsORAUivaUiLIKXaoG VKTuYy//NM+P5fQcPwrYjc5tNuoqGTVf14UXg= Received: by 10.229.48.77 with SMTP id q13mr260416qcf.179.1317103573089; Mon, 26 Sep 2011 23:06:13 -0700 (PDT) Return-Path: Received: from [127.0.0.1] ([216.80.140.47]) by mx.google.com with ESMTPS id hc5sm24011148qab.23.2011.09.26.23.06.11 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 26 Sep 2011 23:06:11 -0700 (PDT) Message-ID: <4E8167D2.4060004@gmail.com> Date: Tue, 27 Sep 2011 01:06:10 -0500 From: Dave User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:6.0.2) Gecko/20110902 Thunderbird/6.0.2 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Boost References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Just so theres no confusion, This is not the Dave who is flying.. Thats Dave Leonard... I'm just a lurker on the listserv.. I was helping Chris Barber with his build for a few years, and got really into the engine/systems/numbers/physics of it all.. Hope that I was helpful. Dave Staten On 9/26/2011 9:30 AM, stevei@carey.asn.au wrote: > Thanks Dave > > I didn't understand how at 22psi you where only developing ~250Hp. > That now makes sense. I thought 22psi was a really high boost. > > So you are charging at ~1.5 x 100%VE (naturally aspirated) however the charge temp is significantly higher. > So if your 13B would develop say 180Hp at 7K RPM without boost, and you are now getting ~250Hp at 45" 200F that seems to make some sense. > > Steve Izett > > > On 26/09/2011, at 10:18 PM, wrote: