X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp106.mail.sc5.yahoo.com ([66.163.169.226] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with SMTP id 940681 for flyrotary@lancaironline.net; Wed, 11 May 2005 19:49:55 -0400 Received-SPF: none receiver=logan.com; client-ip=66.163.169.226; envelope-from=prvt_pilot@yahoo.com Received: from unknown (HELO stevehome) (prvt?pilot@24.136.242.117 with login) by smtp106.mail.sc5.yahoo.com with SMTP; 11 May 2005 23:49:08 -0000 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] sq2000 cooling success ! Date: Wed, 11 May 2005 19:53:29 -0400 Message-ID: <043a01c55684$a21e1740$6401a8c0@workgroup.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_043B_01C55663.1B0C7740" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.6604 (9.0.2911.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_043B_01C55663.1B0C7740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Paul, Congrats on the test. Sounds like you have it licked. Steve Brooks -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of sqpilot@bellsouth.net Sent: Wednesday, May 11, 2005 4:28 PM To: Rotary motors in aircraft Subject: [FlyRotary] sq2000 cooling success ! Hi, fellow rotary enthusiasts....I just had to share my rotary cooling success story. As many of you know, I have an SQ2000 canard with a belly mounted NACA duct. I decided to try adding VG's in front of the NACA duct, as several other canardians suggested. Here is a link showing the VG's and oil flow test. http://users.telenet.be/westlandfamily/cozy/vg/index.htm I conducted two flights today, one without the VG's, then one with them added. OAT was 85 degrees, and very humid. (We were sweating just standing around). On flight one (prior to addition of VG's), climb temps hit 210 (water temp) and stabilized at 205 at WOT. The highest oil temp during the flight was 190. I landed, and we riveted on the two aluminum VG's and I took off again. Water temp during the climb maxed out at 190, and took much longer to reach those numbers. I raised the nose to climb at 90 IAS (which I have not done previously) and water temp rose to 195. I lowered the nose to climb at 100 IAS and the temps came back down to 190. After leveling off, water temp was 180 at WOT. At approximately 3/4 throttle (cruise) water temp was stable at 172 at 3000 AGL. After throttling back for descent, water temps stabilized at 160 where they remained until landing rollout. During taxi back to the hangar, temps rose back up to 182. Highest oil temp during this flight (at any configuration) was 182. It seems obvious that the VG's had a positive influence on the cooling efficiency. I don't profess to understanding exactly how the VG's trip the air into the NACA duct, or being an expert on VG's or cooling issues. I am only reporting what worked for me. The addition of the VG's changed my marginal cooling system into a success story. I should also mention that I did not raise the front nosewheel, as I wanted to see how it would cool in the worst possible situation, (ie landing gear motor unable to regtract the gear) and slow climb speeds. I suspect that on the next flight, when I retract the nosewheel and attain a higher airspeed (at the same power settings), my temps might even come down a couple more degrees. I still need to add wheel pants and clean up the airframe and paint it, but I have finally attained a cooling system I am very pleased with. Paul Conner, smiling in Mobile, AL ------=_NextPart_000_043B_01C55663.1B0C7740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Paul,
Congrats on the test.  Sounds like you have it=20 licked.
 
Steve=20 Brooks
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of=20 sqpilot@bellsouth.net
Sent: Wednesday, May 11, 2005 4:28 = PM
To: Rotary motors in aircraft
Subject: = [FlyRotary]=20 sq2000 cooling success !

Hi, fellow rotary enthusiasts....I = just had to=20 share my rotary cooling success story. As many of you know, I have an = SQ2000=20 canard with a belly mounted NACA duct.  I decided to try adding = VG's in=20 front of the NACA duct, as several other canardians suggested. Here is = a link=20 showing the VG's and oil flow test. http://= users.telenet.be/westlandfamily/cozy/vg/index.htm
 
I conducted two flights today, one = without the=20 VG's, then one with them added.  OAT was 85 degrees, and very = humid. (We=20 were sweating just standing around).
    On flight one = (prior to=20 addition of VG's), climb temps hit 210 (water temp) and stabilized at = 205 at=20 WOT. The highest oil temp during the flight was 190.
    I landed, and we = riveted on=20 the two aluminum VG's and I took off again.  Water temp during = the climb=20 maxed out at 190, and took much longer to reach those numbers. I = raised the=20 nose to climb at 90 IAS (which I have not done previously) and water = temp rose=20 to 195. I lowered the nose to climb at 100 IAS and the temps came back = down to=20 190. After leveling off, water temp was 180 at WOT.  At = approximately 3/4=20 throttle (cruise) water temp was stable at 172 at 3000 AGL. After = throttling=20 back for descent, water temps stabilized at 160 where they remained = until=20 landing rollout. During taxi back to the hangar, temps rose back up to = 182.=20 Highest oil temp during this flight (at any configuration) was=20 182.
     It seems = obvious that=20 the VG's had a positive influence on the cooling efficiency.  I = don't=20 profess to understanding exactly how the VG's trip the air into the = NACA duct,=20 or being an expert on VG's or cooling issues. I am only reporting what = worked=20 for me. The addition of the VG's changed my marginal cooling system = into a=20 success story.
     I should = also mention=20 that I did not raise the front nosewheel, as I wanted to see how it = would cool=20 in the worst possible situation, (ie landing gear motor unable to = regtract the=20 gear) and slow climb speeds.  I suspect that on the next flight, = when I=20 retract the nosewheel and attain a higher airspeed (at the same power=20 settings), my temps might even come down a couple more degrees.  = I still=20 need to add wheel pants and clean up the airframe and paint it, but I = have=20 finally attained a cooling system I am very pleased with.  Paul = Conner,=20 smiling in Mobile, AL
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