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 imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 864369 for flyrotary@lancaironline.net; Sun, 10 Apr 2005 20:33:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=sqpilot@bellsouth.net Received: from paul52u7f5qyav ([209.214.44.228]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with SMTP id <20050411003244.HZPL4997.imf17aec.mail.bellsouth.net@paul52u7f5qyav> for ; Sun, 10 Apr 2005 20:32:44 -0400 Message-ID: <002001c53e2d$f380c480$e42cd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: SQ2000 flying again Date: Sun, 10 Apr 2005 19:32:31 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C53E04.09D1C1A0" 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_001D_01C53E04.09D1C1A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, Steve....thanks for providing your temp info. I used to have = similar numbers prior to installing the ram air scoop. If a 1/8 inch = gap can result in as much as a 20% decrease in cooling efficiency, I = wonder what closing off my 1/2" gap will do? Don't know if I will use = weatherstrip, silicone, or rubber baffle material. Probably the baffle = material, as it remains flexible, and will contour to the curvature of = the cowling better. Thanks for the info. Paul Conner ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Sunday, April 10, 2005 6:57 AM Subject: [FlyRotary] Re: SQ2000 flying again Paul, For a pusher, your temps don't sounds too bad really. If my engine is = hot when I take off, I can see coolant temperatures over 200. Normally = my temps stabilize at about 180 coolant, and 160-170 on the oil. If I = fly at reduced power, which I do to nurse my stock turbo along, I see = coolant stabilize at 160 and oil about the same.=20 If you have any leaks around the radiator, it can greatly reduce the = coolant efficiency. I don't know how true it is, but I once heard that = a 1/8" gap can result in as much as a 20% decrease in cooling = efficiency. I think that you are much closer than you think on the temps. Steve Brooks (too much house building and not enough flying) -----Original Message----- From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net]On Behalf Of Paul Sent: Sunday, April 10, 2005 1:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] SQ2000 flying again I flew the SQ2000 today. The engine is running great, now that I = have a seperate water temp sender for the ECU and another for the engine = monitor. The outside air temp was 80 degrees, and I am very disappointed = with my coolant temps. The water temp hit 205 during the climb. Temps = slowly came back down to 190 once I was in level flight, and dropped to = 170 on short final. Very disappointing. (oil temps were fine). I am = going to seal all the gaps around the radiator first, and see if that = helps. I am concerned that the new ram air scoop I made to bring in = cool air to the throttlebody might be pressurizing the rear of the = cowling, and inhibiting the induction of air through the radiator. I = will try sealing around the radiator first. If that fails to bring the = temps down, I will try removing the ram air scoop and installing a NACA = scoop with a hose to bring air directly to the throttlebody, and not = dump it into the low pressure area of the cowling. If that fails, I = think I will take up fishing or golf. Paul Conner, 13b powered SQ2000 in Mobile, AL -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.9.5 - Release Date: 4/7/2005 ------=_NextPart_000_001D_01C53E04.09D1C1A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi, Steve....thanks for providing your = temp=20 info.  I used to have similar numbers prior to installing the ram = air=20 scoop.  If a 1/8 inch gap can result in as much as a 20% decrease = in=20 cooling efficiency, I wonder what closing off my 1/2" gap will do?  = Don't=20 know if I will use weatherstrip, silicone, or rubber baffle = material. =20 Probably the baffle material, as it remains flexible, and will contour = to the=20 curvature of the cowling better.  Thanks for the info.  Paul=20 Conner
----- Original Message -----
From:=20 Steve=20 Brooks
Sent: Sunday, April 10, 2005 = 6:57=20 AM
Subject: [FlyRotary] Re: SQ2000 = flying=20 again

Paul,
For=20 a pusher, your temps don't sounds too bad really.  If my engine = is hot=20 when I take off, I can see coolant temperatures over 200.  = Normally my=20 temps stabilize at about 180 coolant, and 160-170 on the oil.  If = I fly=20 at reduced power, which I do to nurse my stock turbo along, I see = coolant=20 stabilize at 160 and oil about the same. 
 
If=20 you have any leaks around the radiator, it can greatly reduce the = coolant=20 efficiency.  I don't know how true it is, but I once heard that a = 1/8"=20 gap can result in as much as a 20% decrease in cooling=20 efficiency.
 
I=20 think that you are much closer than you think on the=20 temps.
 
Steve Brooks (too much house building and not enough=20 flying)
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of = Paul
Sent:=20 Sunday, April 10, 2005 1:34 AM
To: Rotary motors in=20 aircraft
Subject: [FlyRotary] SQ2000 flying=20 again

I flew the SQ2000 today. The engine = is running=20 great, now that I have a seperate water temp sender for the ECU and = another=20 for the engine monitor. The outside air temp was 80 degrees, and I = am very=20 disappointed with my coolant temps. The water temp hit 205 during = the=20 climb.  Temps slowly came back down to 190 once I was in level = flight,=20 and dropped to 170 on short final. Very disappointing. (oil = temps were=20 fine).  I am going to seal all the gaps around the radiator = first, and=20 see if that helps.  I am concerned that the new ram air scoop I = made to=20 bring in cool air to the throttlebody might be pressurizing the rear = of the=20 cowling, and inhibiting the induction of air through the radiator. I = will=20 try sealing around the radiator first. If that fails to bring the = temps=20 down, I will try removing the ram air scoop and installing a NACA = scoop with=20 a hose to bring air directly to the throttlebody, and not dump it = into the=20 low pressure area of the cowling.  If that fails, I think I = will take=20 up fishing or golf.
     Paul = Conner, 13b=20 powered SQ2000 in Mobile, AL

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.308 / Virus Database: 266.9.5 - Release = Date:=20 4/7/2005
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