X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 06 Feb 2011 18:04:09 -0500 Message-ID: X-Original-Return-Path: Received: from nm23-vm0.bullet.mail.sp2.yahoo.com ([98.139.91.224] verified) by logan.com (CommuniGate Pro SMTP 5.4c2a) with SMTP id 4838733 for lml@lancaironline.net; Fri, 04 Feb 2011 19:28:43 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.91.224; envelope-from=randylsnarr@yahoo.com Received: from [98.139.91.65] by nm23.bullet.mail.sp2.yahoo.com with NNFMP; 05 Feb 2011 00:28:07 -0000 Received: from [98.139.91.4] by tm5.bullet.mail.sp2.yahoo.com with NNFMP; 05 Feb 2011 00:28:07 -0000 Received: from [127.0.0.1] by omp1004.mail.sp2.yahoo.com with NNFMP; 05 Feb 2011 00:28:07 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 87871.35231.bm@omp1004.mail.sp2.yahoo.com Received: (qmail 26194 invoked by uid 60001); 5 Feb 2011 00:28:06 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=tWK2fe4Zn80GGGRRFKMJisJaHrtBAu2NX4rNpzEGD6c47NY095e/yLWNmXzOpxVSgjI/WtAC1HmigBrkn7mYhAnzhPdJb67ICYGlu+864Cmauwi72gNtnJsw2ity3nZmfNmgY6dRt3/2grWPHvR0B2jeVs0Wt9vdocqfhpI3JHk=; X-Original-Message-ID: <541151.91952.qm@web111409.mail.gq1.yahoo.com> X-YMail-OSG: TEVOQb8VM1kI2nqRUpg9HqHrNXGb1hlx1VjWi4EVnYnULCW WXCJL0MaXDOmBuvWlhR.rmCldeBGzI3E4bppslbBGsPA9o.zrL.UiVgJKlYD _4lJzJkJI3g.0kKIj1iurobqWDLuURjpvbLP2juuYjzp2UzuHumceC0CtIsA NHdDgRMwv473UK6Z2QEU8K9ZCvwZzXM2MyL_V7c3SQ.KpLdigHv96FcwGQCR F1JWVmgc0jEcpjDTCyUlsdX8KpgR_keUvV.1CCVtNKQxwWdJcNSI.goyzk5r 5BtbYCyZ3uuT1m4OLwl0_ga.aAMgK0PHJioyByrNS8I7jx4dAGsQWwvN4ccl cusAaXNspi_XrJjT4VQ3oHOPf0oM0nO1uigpJiQQkFTSSiBSpv3PymQ9zc7V re.ympcEOoviC Received: from [69.169.190.15] by web111409.mail.gq1.yahoo.com via HTTP; Fri, 04 Feb 2011 16:28:06 PST X-Mailer: YahooMailClassic/11.4.20 YahooMailWebService/0.8.108.291010 X-Original-Date: Fri, 4 Feb 2011 16:28:06 -0800 (PST) From: randy snarr Subject: Re: [LML] Re: 360 Cooling X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-123721692-1296865686=:91952" --0-123721692-1296865686=:91952 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Bryan, I am talking about the baffeling that wraps around the cylinders. IF they a= re too tight at the bottom=A0 you will run hot... I opened up mine a little and also rounded the exits so they are not square= . It helped.. Hope that helps some.. Randy Snarr N694RS "Flight by machines heavier than air is unpractical and insignificant, if n= ot utterly impossible" -Simon Newcomb, 1902 --- On Thu, 2/3/11, Bryan Wullner wrote: From: Bryan Wullner Subject: [LML] Re: 360 Cooling To: lml@lancaironline.net Date: Thursday, February 3, 2011, 10:39 AM I think I'm going to try the small lips on the bottom of the cowling at the= exit. See if that does anything.Im not fully understanding what your sayin= g about the bottom baffeling. Are you talking about the center peice that g= oes between each cyl on the bottom?=0ABryan On Tue, Feb 1, 2011 at 4:48 AM, randy snarr wrote: =0ABryan, Check the exits on the baffeling on the bottom of each cylinder. If memory = serves, there was a paper released by NASA with some cooling info on these = small engines. I thought it was 1.6" times the depth of the cooling fins fo= r the opening at the bottom of the cylinder. I remember going a little wide= r, say 2" or so.. If they are a little too tight at the bottom, that can ca= use cooling issues. I opened up mine a little and also rounded them off ins= tead of 90 deg bends. Also for the air inlets on the engine, you are better= off to have that be smooth with no steps. =0AIt may be several issues not just one. There is also a test you can do w= ith the vernatherm. I took mine out, put it in oil and ran the temp up to 1= 80 to see if it would open.. Mine did so I solved the issue with "other " items that others are suggesti= ng.. =0AOne other item on the plennum,=0A If it is too tight on the top of the e= ngine, you will never get effective cooling on the engine or oil cooler. I = have seen plennums built very close to the top of the engine and they dont = work like that. Mine is so close to the inside of the upper cowl, I marvel = that it has not rubbed off the paint. It is close which gives a better expa= nsion of the cooing air where you can build pressure to go down the cooling= fins. I would also put a shop light under the engine with the plennum off = and caulk with high temp RTV every crack and hole you can find with the lig= ht. By sealing all that up tight, your cooling air has nowhere to go but th= rough the cooling fins to the bottom of the cowling.. I would do all of the= se before I start cutting up the cowl.. I have also seen small curls on the= opening of the lower cowl lower temps. Believe it or not, outside air is r= ushing in that opening at the bottom of the cowl. Look at every certifited = model with an opening in the=0A cowl, they all have a louver of deflector t= o create a wake so the outside flow air does not go in the opening... Can you elaborate on how the plennum is set up and or provide some pictures= ? Sorry for blabbering... =0ARandy Snarr "Flight by machines heavier than air is unpractical and insignificant, if n= ot utterly impossible" -Simon Newcomb, 1902 --- On Mon, 1/31/11, bucky wrote: =0A From: bucky Subject: [LML] 360 Cooling =0ATo: lml@lancaironline.net Date: Monday, January 31, 2011, 6:17 AM =0A=0A =0A =0A=0ABryan,=0AThis is from the Lancair Mail Newsletter from yea= rs =0Aago. I was having the same problem with cooling. I have fuel injectio= n and =0Astandard baffling. I installed the additional exit air ducting, bl= ocked off oil =0Acooler intake at #3 cyl. I=A0Installed a 3" naca duct on b= ottom of cowling, =0Arouted a 3" scat tube to the oil cooler which exits ou= t the side with louvers. =0A=0AThere may be other fixes, but this worked fo= r =0Ame.=0A=A0=0A=A0 -----Inline Attachment Follows----- -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html =0A =0A=0A =20 =0A=0A=0A=0A --0-123721692-1296865686=:91952 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Bryan,
I am talking about the baffeling th= at wraps around the cylinders. IF they are too tight at the bottom  yo= u will run hot...
I opened up mine a little and also rounded the exits s= o they are not square.
It helped..
Hope that helps some..
Randy Sn= arr
N694RS

"Flight by machine= s heavier than air is unpractical and insignificant, if not utterly impossi= ble"
-Simon Newcomb, 1902

--- On Thu, 2/3/11, Bryan Wul= lner <vonjet@gmail.com> wrote:

From: Bryan Wullner <vonjet@gmail.com>
Subject: [LML] Re: 360= Cooling
To: lml@lancaironline.net
Date: Thursday, February 3, 2011, = 10:39 AM

I think I'm going to try the small= lips on the bottom of the cowling at the exit. See if that does anything.
Im n= ot fully understanding what your saying about the bottom baffeling. Are you= talking about the center peice that goes between each cyl on the bottom?=0A
Bryan

On Tue, Feb= 1, 2011 at 4:48 AM, randy snarr <randylsnarr@yahoo.com> wrote:=
= =0A
=0A=0A
=0A
Bryan,
Check the exits on the baffeling on the bottom of each cylinder.= If memory serves, there was a paper released by NASA with some cooling inf= o on these small engines. I thought it was 1.6" times the depth of the cool= ing fins for the opening at the bottom of the cylinder. I remember going a = little wider, say 2" or so.. If they are a little too tight at the bottom, = that can cause cooling issues. I opened up mine a little and also rounded t= hem off instead of 90 deg bends. Also for the air inlets on the engine, you= are better off to have that be smooth with no steps.
=0AIt may be sever= al issues not just one. There is also a test you can do with the vernatherm= . I took mine out, put it in oil and ran the temp up to 180 to see if it wo= uld open..
Mine did so I solved the issue with "other " items that other= s are suggesting..
=0AOne other item on the plennum,=0A If it is too tig= ht on the top of the engine, you will never get effective cooling on the en= gine or oil cooler. I have seen plennums built very close to the top of the= engine and they dont work like that. Mine is so close to the inside of the= upper cowl, I marvel that it has not rubbed off the paint. It is close whi= ch gives a better expansion of the cooing air where you can build pressure = to go down the cooling fins. I would also put a shop light under the engine= with the plennum off and caulk with high temp RTV every crack and hole you= can find with the light. By sealing all that up tight, your cooling air ha= s nowhere to go but through the cooling fins to the bottom of the cowling..= I would do all of these before I start cutting up the cowl.. I have also s= een small curls on the opening of the lower cowl lower temps. Believe it or= not, outside air is rushing in that opening at the bottom of the cowl. Loo= k at every certifited model with an opening in the=0A cowl, they all have a= louver of deflector to create a wake so the outside flow air does not go i= n the opening...
Can you elaborate on how the plennum is set up and or p= rovide some pictures?
Sorry for blabbering...
=0ARandy Snarr

<= span style=3D"font-style: italic;">"Flight by machines heavier than air is = unpractical and insignificant, if not utterly impossible"
-Simon = Newcomb, 1902

--- On Mon, 1/31/11, bucky <bwhittier@ltol.com> wrote:
= =0A

From: bucky <bwhittier@ltol.com>
Subject: [LML] 360 Cooling=
=0ATo: lml@lancairo= nline.net
Date: Monday, January 31, 2011, 6:17 AM


=0A=0A =0A =0A=0A
Bryan,
=0A
This is from = the Lancair Mail Newsletter from years =0Aago. I was having the same proble= m with cooling. I have fuel injection and =0Astandard baffling. I installed= the additional exit air ducting, blocked off oil =0Acooler intake at #3 cy= l. I Installed a 3" naca duct on bottom of cowling, =0Arouted a 3" sca= t tube to the oil cooler which exits out the side with louvers. =0A<= /div>=0A
There may be other fixes, but = this worked for =0Ame.
=0A
=  
=0A
 

-----Inline Attachment Follows-----


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