X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: \eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from [129.116.87.170] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 864726 for flyrotary@lancaironline.net; Mon, 11 Apr 2005 09:02:25 -0400 Received-SPF: none receiver=logan.com; client-ip=129.116.87.170; envelope-from=mark.steitle@austin.utexas.edu X-MIMEOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C53E96.9ADB873B" Subject: RE: [FlyRotary] Re: SQ2000 flying again Date: Mon, 11 Apr 2005 08:01:41 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69EC0817E@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: SQ2000 flying again Thread-Index: AcU+LPIRpr7iXc9qQ2KKruiswCT1lAAaKmUg From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C53E96.9ADB873B Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Paul, Just to chime in here, we were just last week discussing the importance of minimizing the pressure behind the radiator. By dumping air into the cowl, you have reduced the airflow across the radiator core. Ducting the engine intake air directly into the TB will reduce the pressure behind the radiator and should improve cooling. =20 =20 Mark S. =20 (been reading chapter 12...learned enough to be dangerous) ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Paul Sent: Sunday, April 10, 2005 7:24 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: SQ2000 flying again =20 Hi, Rusty....yes, the air is dumped directly into the cowling in the vicinity of the throttle body. I reduced the throttle to 4900 rpm's, and temps did not come down in the climb. Prior to installing the ram air scoop, my temps would actually drop during a climb at 4900 rpm's, so I believe the ram air scoop to be the culprit. I have a NACA duct and some 3 inch tubing on the way. I am going to build an airtight plenum over the throttlebody and the NACA duct/sceet tubing will deliver fresh air to the throttlebody ONLY and not dump it into the low pressure area of the cowling, thus inhibiting my cooling. I guess that's why they call it experimental. Paul Conner ------_=_NextPart_001_01C53E96.9ADB873B Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Paul,

Just to chime in here, we were just = last week discussing the importance of minimizing the pressure behind the = radiator.  By dumping air into the cowl, you have reduced the airflow across the = radiator core.  Ducting the engine intake air directly into the TB will = reduce the pressure behind the radiator and should improve cooling.  =

 

Mark S. =   

(been reading chapter = 12…learned enough to be dangerous)

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Paul
Sent: Sunday, April 10, = 2005 7:24 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = SQ2000 flying again

 

Hi, Rusty....yes, the air is dumped directly into the cowling in the vicinity of the throttle body. I reduced the throttle to = 4900 rpm's, and temps did not come down in the climb. Prior to installing the = ram air scoop, my temps would actually drop during a climb at 4900 rpm's, so = I believe the ram air scoop to be the culprit.  I have a NACA duct = and some 3 inch tubing on the way. I am going to build an airtight plenum over = the throttlebody and the NACA duct/sceet tubing will deliver fresh air to = the throttlebody ONLY and not dump it into the low pressure area of the cowling, thus = inhibiting my cooling.  I guess that's why they call it = experimental.   Paul Conner

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