X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 940605 for flyrotary@lancaironline.net; Wed, 11 May 2005 19:15:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-189-178.carolina.res.rr.com [24.74.189.178]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j4BNEFLw006985 for ; Wed, 11 May 2005 19:14:16 -0400 (EDT) Message-ID: <001901c5567f$2bff15a0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] sq2000 cooling success ! Date: Wed, 11 May 2005 19:14:24 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C5565D.A4B6AE30" 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 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C5565D.A4B6AE30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Great to hear, Paul! Now you can use your eyeballs to watch the scenery instead of the temp = gauges {:>) Ed ----- Original Message -----=20 From: sqpilot@bellsouth.net=20 To: Rotary motors in aircraft=20 Sent: Wednesday, May 11, 2005 4:27 PM 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 -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0016_01C5565D.A4B6AE30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Great to hear, Paul!
 
Now you can use your eyeballs to watch the = scenery instead=20 of the temp gauges {:>)
 
Ed
----- Original Message -----
From:=20 sqpilot@bellsouth.net
Sent: Wednesday, May 11, 2005 = 4:27=20 PM
Subject: [FlyRotary] sq2000 = cooling=20 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

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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