X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mailrelay.embarq.synacor.com ([208.47.184.3] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4541970 for flyrotary@lancaironline.net; Mon, 25 Oct 2010 21:43:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=208.47.184.3; envelope-from=candtmallory@embarqmail.com Return-Path: DKIM-Signature: v=1; a=rsa-sha1; d=embarqmail.com; s=s012408; c=relaxed/simple; q=dns/txt; i=@embarqmail.com; t=1288057374; h=From:Subject:Date:To:MIME-Version:Content-Type; bh=gtNN/LVzqHBE03a4dXE99L1s/Is=; b=HTYqpuAM99R/y0e3hhLNsHrDoZu7XaY+xsuHuvoCsdRHcm5d1oCQMdpb3/Jy7Yw8 1MxB1Wa9eGjHuweUUWRxxB/xI0A3cFUUxv1KhSlIc4nmRgz4jX+8f9hdf4LTvZ8p; X-BINDING: X-Spam-Rating: None X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=1.1 cv=88MwM69NLEQvLW0wL/d+nsvX+j7oY0djBN1bVySlTmY= c=1 sm=0 a=ivvnU8uN_rkA:10 a=jGa3PEj4gNbevsvxH5tqxQ==:17 a=3oc9M9_CAAAA:8 a=1oqGTYSLAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=S3Zput68WulCZpV3E44A:9 a=cOiqA-Yz8ZnWPtqrm8MA:7 a=CHfTNBOOL3btP4Y4iFn3xylAEhcA:4 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=U8Ie8EnqySEA:10 a=cvn8laQl214A:10 a=EzXvWhQp4_cA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=r4bVwSIbfwTAMmE-MVEA:9 a=YqhvFtpDAt3WJp7Tep0A:7 a=ysj9u0C2EIKz_06kHQVI-3qaOTMA:4 a=jGa3PEj4gNbevsvxH5tqxQ==:117 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp01.embarq.synacor.com smtp.user=candtmallory@embarqmail.com; auth=pass (LOGIN) Received: from [76.5.160.103] ([76.5.160.103:14461] helo=AcerPC) by mailrelay.embarq.synacor.com (envelope-from ) (ecelerity 2.2.2.40 r(29895/29896)) with ESMTPA id A3/AD-07456-D1236CC4; Mon, 25 Oct 2010 21:42:54 -0400 From: "Chris and Terria" To: "'Rotary motors in aircraft'" Subject: FW: [FlyRotary] Ready to fly again Date: Mon, 25 Oct 2010 21:42:52 -0400 Message-ID: <001701cb74af$1b1b3da0$5151b8e0$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01CB748D.94099DA0" X-Mailer: Microsoft Office Outlook 12.0 Content-Language: en-us Thread-Index: Act0AlEgH2TnMAscT/+GfzOMOKZrBAAl3j/wAAVQfVA= This is a multi-part message in MIME format. ------=_NextPart_000_0018_01CB748D.94099DA0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Yes, I have split the inlet in the cowl. In the picture, the smaller = (right) portion goes up to the oil cooler. The larger (left) portion is = for the water cooler. You are right on all your presumptions, Sam James = cowl, griffin radiator, oil cooler on the right side of the engine. =20 I flew her again today, but didn=E2=80=99t get great results. Here is = the data: =20 Renesis, RD-1C, BIG FAT CATTO prop (76 x 88) Static RPM max =3D 5000 67* outside air temp Rolling down the runway, the max RPM was 5300 Best speed I got was 70 KTS At 1500 feet, I pulled the power back with water temp at 210 (it peaked = at 230, but by then, I was at idle) Pulled closed and landed, 190 on both water and oil temp at landing. =20 Water cooler inlet is 36 sq in. =20 Exit at the back of the cowl for water and oil cooling air, and exhaust = is 67 sq in. =20 I have a couple of ideas. One is that my exit isn=E2=80=99t large = enough, so I am backing up air, and not getting proper cooling. Second is that the shape of my duct isn=E2=80=99t good enough. I think = I can check this using a manometer (may be spelled wrong), but I would = like some directions on how to accomplish this. Third, I may be getting some blow-by at the bottom of my radiator. If = the fiberglass cowling bows out due to pressure in the intake duct, I am = loosing cooling. I think I can check this by tying the plane down REAL = WELL, running the engine up to high power setting and looking into the = cowl exit. If I see daylight below the radiator, I know I have blow-by. Fourth, the prop is so big, that the engine can=E2=80=99t pull the plane = through the air enough to get fast and create better cooling flow. If I = have to keep full power and can only generate 70 kts, the radiator will = never keep up. =20 Looking for inputs and comments from the group. =20 Chris =20 From: shipchief@aol.com [mailto:shipchief@aol.com]=20 Sent: Monday, October 25, 2010 1:06 AM To: candtmallory@embarqmail.com Subject: Re: [FlyRotary] Ready to fly again =20 C&T; WOW! That's exotic! I presume you have a Sam James Rotary cowl? I built = a chin scoop for a griffin radiator, but it's just a simple scoop with = no upper lip. I have the stock VAN's RV-8 cowl, so I take oil cooler air from the = right cowl cheek; it looks like you have the oil cooler on the right = side and take that air from the right side of the chin scoop? I too did concept testing on my partially completed scoops and = diffusers. Once they proved good I continued with the finish work, and = you know what? they worked even better as finished parts than the tape = and cardboard test peices. =20 =20 -----Original Message----- From: Chris and Terria To: Rotary motors in aircraft Sent: Sun, Oct 24, 2010 6:16 pm Subject: [FlyRotary] Ready to fly again Gents, =20 I=E2=80=99ve finally installed my new radiator and built the ductwork. = The sides and top are completed with fiberglass, the bottom is just the = foam, covered with duct tape. It will hold the shape, and can=E2=80=99t = fall out or move. So tomorrow I test it out. =20 I=E2=80=99ll post the results tomorrow. =20 Chris =20 -- Homepage: http://www.flyrotary.com/ = Archive and UnSub: = = http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 ------=_NextPart_000_0018_01CB748D.94099DA0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Yes, I have split the inlet in the cowl.  In the = picture, the smaller (right) portion goes up to the oil cooler.  The larger = (left) portion is for the water cooler.  You are right on all your = presumptions, Sam James cowl, griffin radiator, oil cooler on the right side of the = engine.

 

I flew her again today, but didn=E2=80=99t get great = results.  Here is the data:

 

Renesis, RD-1C, BIG FAT CATTO prop (76 x = 88)

Static RPM max =3D 5000

67* outside air temp

Rolling down the runway, the max RPM was = 5300

Best speed I got was 70 KTS

At 1500 feet, I pulled the power back with water temp at = 210 (it peaked at 230, but by then, I was at idle)

Pulled closed and landed, 190 on both water and oil temp = at landing.

 

Water cooler inlet is 36 sq in.  =

Exit at the back of the cowl for water and oil cooling = air, and exhaust is 67 sq in.

 

I have a couple of ideas.  One is that my exit = isn=E2=80=99t large enough, so I am backing up air, and not getting proper = cooling.

Second is that the shape of my duct isn=E2=80=99t good = enough.  I think I can check this using a manometer (may be spelled wrong), but I = would like some directions on how to accomplish this.

Third, I may be getting some blow-by at the bottom of my radiator. If the fiberglass cowling bows out due to pressure in the = intake duct, I am loosing cooling.  I think I can check this by tying the = plane down REAL WELL, running the engine up to high power setting and looking = into the cowl exit.  If I see daylight below the radiator, I know I have blow-by.

Fourth, the prop is so big, that the engine can=E2=80=99t = pull the plane through the air enough to get fast and create better cooling flow.  = If I have to keep full power and can only generate 70 kts, the radiator will = never keep up.

 

Looking for inputs and comments from the = group.

 

Chris

 

From:= = shipchief@aol.com [mailto:shipchief@aol.com]
Sent: Monday, October 25, 2010 1:06 AM
To: candtmallory@embarqmail.com
Subject: Re: [FlyRotary] Ready to fly again

 

C&T;

WOW! That's exotic! I presume you have a Sam James Rotary = cowl? I built a chin scoop for a griffin radiator, but it's just a simple scoop = with no upper lip.

I have the stock VAN's RV-8 cowl, so I take oil cooler air = from the right cowl cheek; it looks like you have the oil cooler on the right = side and take that air from the right side of the chin = scoop?

I too did concept testing on my partially completed scoops = and diffusers. Once they proved good I continued with the finish work, and = you know what? they worked even better as finished parts than the tape and = cardboard test peices.

 

 

-----Original = Message-----
From: Chris and Terria <candtmallory@embarqmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sun, Oct 24, 2010 6:16 pm
Subject: [FlyRotary] Ready to fly again

Gents,

 

I=E2=80=99ve finally installed my new radiator and = built the ductwork.  The sides and top are completed with fiberglass, the = bottom is just the foam, covered with duct tape.  It will hold the shape, and = can=E2=80=99t fall out or move.  So tomorrow I test it out.

 

I=E2=80=99ll post the results = tomorrow.

 

Chris 

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