X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4126352 for flyrotary@lancaironline.net; Mon, 15 Feb 2010 23:44:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.125; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=1.0 c=1 a=qQzJiGXPnp-ojoLhdNYA:9 a=ulYEqLbAcw_iSoOGsMWpdwLjT3YA:4 a=hI5nmvdkQvOAyofB:21 a=mqe3Y1jATRRNg24I:21 a=4PR2P7QzAAAA:8 a=TsqQ6FQDrM0VP83PpZkA:9 a=mN9bTbCDAQ4fZYoWreAA:7 a=lZ_HmvajyxSi-XvVqzfetPgSJREA:4 a=djSSOgbfo6cA:10 X-Cloudmark-Score: 0 X-Originating-IP: 66.25.157.35 Received: from [66.25.157.35] ([66.25.157.35:3790] helo=[10.0.0.99]) by hrndva-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id A9/8B-13133-8822A7B4; Tue, 16 Feb 2010 04:43:52 +0000 Message-ID: <4B7A2288.40500@austin.rr.com> Date: Mon, 15 Feb 2010 22:43:52 -0600 From: Dennis Haverlah User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Air Pump References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------090909050005080009020403" This is a multi-part message in MIME format. --------------090909050005080009020403 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit The problem I have with a belt driven unit is the bearings and pulley - they increase the width and make it hard to fit between the engine and motor. Attaching the fan to the crankshaft pulley solves that problem if a fan can be found that will produce the needed air flow at our design rpm. Plus one of the largest leaf blowers new is less than $500. Can't buy much of a turbo for that price! Dennis H. Bill Bradburry wrote: > Dennis, > > I think the Lycosaurous people get about ¾ to 1 inch of improvement > with ram air at a couple of hundred mph. That seems consistant with > the airspeed of the air from your blower. Your idea to attach a > centrifugal blower up to the pulley is a good one. You could make it > belt driven like the alternator and with a small pulley, crank it up > to about 12K rpm! > > Pictures?? > > Bill B > > > > ------------------------------------------------------------------------ > > > --------------090909050005080009020403 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit The problem I have with a belt driven unit is the bearings and pulley - they increase the width and make it hard to fit between the engine and motor. Attaching the fan to the crankshaft pulley solves that problem if a fan can be found that will produce the needed air flow at our design rpm. Plus one of the largest leaf blowers new is less than $500. Can't buy much of a turbo for that price!

Dennis H.

Bill Bradburry wrote:

Dennis,

I think the Lycosaurous people get about ¾ to 1 inch of improvement with ram air at a couple of hundred mph. That seems consistant with the airspeed of the air from your blower. Your idea to attach a centrifugal blower up to the pulley is a good one. You could make it belt driven like the alternator and with a small pulley, crank it up to about 12K rpm!

Pictures??

Bill B

--------------090909050005080009020403--