X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4127740 for flyrotary@lancaironline.net; Tue, 16 Feb 2010 23:46:30 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100217044556.WLGX20722.fed1rmmtao107.cox.net@fed1rmimpo03.cox.net> for ; Tue, 16 Feb 2010 23:45:56 -0500 Received: from willsPC ([68.105.86.80]) by fed1rmimpo03.cox.net with bizsmtp id islu1d00K1k005Q04slvac; Tue, 16 Feb 2010 23:45:55 -0500 X-VR-Score: -130.00 X-Authority-Analysis: v=1.1 cv=3OYv9oSQMPl2mzQJct9Z0gr0/14v7p3aTRAVsPGESI0= c=1 sm=1 a=XruvlouZCDbGUgEaRUiNZQ==:17 a=evYjGSnBOXtV-zj54AAA:9 a=mya0eRRj0IN1_wCshJIA:7 a=3b14ZBuxGoIlgdPKI-EYYDwcXgkA:4 a=rZ_9ntTEzGtJ0HCz:21 a=xIVR5S5A1XakBimy:21 a=ayC55rCoAAAA:8 a=Ia-xEzejAAAA:8 a=4PR2P7QzAAAA:8 a=2PDvXMl8InoONF2PrcoA:9 a=5e1RsmmEkjQQLUr_nqUA:7 a=VnBHDeRkPv6tx1fmZ777hOlG2TsA:4 a=EzXvWhQp4_cA:10 a=djSSOgbfo6cA:10 a=I2TXEGahMugdL8v-:21 a=FbdwrqTPBo958GKj:21 a=XruvlouZCDbGUgEaRUiNZQ==:117 X-CM-Score: 0.00 Message-ID: From: "Mike Wills" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Air Pump Date: Tue, 16 Feb 2010 20:45:54 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0096_01CAAF49.08D09040" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 This is a multi-part message in MIME format. ------=_NextPart_000_0096_01CAAF49.08D09040 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dennis, First let me say that you and your brother apparently have too much = spare time on your hands (just kidding!). Actually I'm pretty impressed = that you'd take the time to do this and document it. Having said that, I think Al makes a couple of good points - you could = conceivably make up a significant amount of the measured difference with = a good ram air system in flight. And finally, while you are right - that you cant buy much of a turbo = for $500, it wouldn't take much of a turbo to get an additional 1.2". = This looks like a lot of work ( and added complexity, failure modes, = etc...) for not a lot of payoff. Mike From: Dennis Haverlah=20 Sent: Monday, February 15, 2010 8:43 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Air Pump 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 =BE 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=20 =20 -------------------------------------------------------------------------= ----- =20 ------=_NextPart_000_0096_01CAAF49.08D09040 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Dennis,
 
 First let me say that you and your = brother=20 apparently have too much spare time on your hands (just kidding!). = Actually I'm=20 pretty impressed that you'd take the time to do this and document=20 it.
 
 Having said that, I think Al makes a = couple of=20 good points - you could conceivably make up a significant amount of = the=20 measured difference with a good ram air system in flight.
 
 And finally, while you are right - that = you cant=20 buy much of a turbo for $500, it wouldn=92t take much of a turbo to get = an=20 additional 1.2". This looks like a lot of work ( and added complexity, = failure=20 modes, etc...) for not a lot of payoff.
 
Mike
From: Dennis Haverlah
Sent: Monday, February 15, 2010 8:43 PM
Subject: [FlyRotary] Re: Air Pump

The problem I have with a belt driven unit is the = bearings and=20 pulley - they increase the width and make it hard to fit between the = engine and=20 motor.  Attaching the fan to the crankshaft pulley solves that = problem if a=20 fan can be found that will produce the needed air flow at our design = rpm. =20 Plus one of the largest leaf blowers new is less than $500.  = Can't=20 buy much of a turbo for that price!

Dennis H.

Bill = Bradburry=20 wrote:

Dennis,

I think the Lycosaurous people get about =BE = to 1 inch=20 of improvement with ram air at a couple of hundred mph.  That = seems=20 consistant with the airspeed of the air from your blower.  Your = idea to=20 attach a centrifugal blower up to the pulley is a good one.  You = could=20 make it belt driven like the alternator and with a small pulley, crank = it up=20 to about 12K rpm!

Pictures??

Bill = B 

 


 

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