X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: (direct reply)\eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 865669 for flyrotary@lancaironline.net; Mon, 11 Apr 2005 22:15:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=sqpilot@bellsouth.net Received: from paul52u7f5qyav ([209.214.44.123]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with SMTP id <20050412021411.SDOE2068.imf22aec.mail.bellsouth.net@paul52u7f5qyav> for ; Mon, 11 Apr 2005 22:14:11 -0400 Message-ID: <009201c53f05$4edd9ce0$e52dd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: SQ2000 flying again Date: Mon, 11 Apr 2005 21:14:06 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_008F_01C53EDB.655730A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_008F_01C53EDB.655730A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageThanks, Mark....I was fairly confident that was the problem. = Prior to installing the ram air scoop I could cool in the climb. Water = temps went from 180 to 205 at the same power settings. With all that = air rushing in through that huge ram air scoop, I'm surprised the air = didn't go through the radiator backwards. (It was probably trying to). = Probably fighting the incoming flow from the large underbelly NACA = through the radiator. I removed the ram air scoop today and made an = aluminum plenum with a 3 inch hose outlet. As soon as the 3" outlet NACA = duct arrives (from Aircraft Spruce) I will glass it in and give it a = try. I'm convinced that dumping the air directly into the plenum is the = way to go, rather than dumping it into the low pressure area of the = cowling near the throttlebody, hoping some of it would be sucked into = the engine. Oh well, live and learn. Fortunately, I haven't painted my = plane yet. Much easier to do these mods in primer. Paul Conner ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, April 11, 2005 8:01 AM Subject: [FlyRotary] Re: SQ2000 flying again 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 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.9.6 - Release Date: 4/11/2005 ------=_NextPart_000_008F_01C53EDB.655730A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message=
Thanks, Mark....I was fairly confident = that was the=20 problem. Prior to installing the ram air scoop I could cool in the = climb. Water=20 temps went from 180 to 205 at the same power settings.  With all = that air=20 rushing in through that huge ram air scoop, I'm surprised the air didn't = go=20 through the radiator backwards. (It was probably trying to).  = Probably=20 fighting the incoming flow from the large underbelly NACA through the=20 radiator.  I removed the ram air scoop today and made an aluminum = plenum=20 with a 3 inch hose outlet. As soon as the 3" outlet NACA duct arrives = (from=20 Aircraft Spruce) I will glass it in and give it a try. I'm convinced = that=20 dumping the air directly into the plenum is the way to go, rather than = dumping=20 it into the low pressure area of the cowling near the throttlebody, = hoping some=20 of it would be sucked into the engine.  Oh well, live and=20 learn. Fortunately, I haven't painted my plane yet.  Much = easier=20 to do these mods in primer.   Paul Conner
----- Original Message -----
From:=20 Mark R Steitle =
Sent: Monday, April 11, 2005 = 8:01=20 AM
Subject: [FlyRotary] Re: SQ2000 = flying=20 again

Paul,

Just to = chime in=20 here, we were just last week discussing the importance of minimizing = the=20 pressure behind the radiator.  By dumping air into the cowl, you = have=20 reduced the airflow across the radiator core.  Ducting the engine = intake=20 air directly into the TB will reduce the pressure behind the radiator = and=20 should improve cooling. 

 

Mark S.=20   

(been = reading chapter=20 12=85learned enough to be dangerous)

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Paul
Sent: Sunday, April 10, 2005 = 7:24=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: SQ2000 = flying=20 again

 

Hi, Rusty....yes, the = air is=20 dumped directly into the cowling in the vicinity of the throttle body. = I=20 reduced the throttle to 4900 rpm's, and temps did not come down in the = climb.=20 Prior to installing the ram air scoop, my temps would actually drop = during a=20 climb at 4900 rpm's, so I believe the ram air scoop to be the = culprit.  I=20 have a NACA duct and some 3 inch tubing on the way. I am going to = build an=20 airtight plenum over the throttlebody and the NACA duct/sceet tubing = will=20 deliver fresh air to the throttlebody ONLY and not dump it into the = low=20 pressure area of the cowling, thus inhibiting my cooling.  I = guess that's=20 why they call it experimental.   Paul=20 Conner

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.308 / Virus Database: 266.9.6 - Release = Date:=20 4/11/2005
------=_NextPart_000_008F_01C53EDB.655730A0--