X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=T4/ysMCQ c=1 sm=1 tr=0 a=Xmx/tSr6Fvg6eVx5RPhjvQ==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=FmdZ9Uzk2mMA:10 a=NiUXRqVD9KgA:10 a=CjxXgO3LAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=JoQWYm39AAAA:8 a=0yToFo5mnJy6PesO_7kA:9 a=XeDrJsJUwg5eugFH:21 a=1spepU8uTo6-LVKh:21 a=QEXdDO2ut3YA:10 a=fxJAN5q4AAAA:8 a=5e3L5gT-Yu6Zx1KQh3MA:9 a=EqE07TQJEEqPnuV8:21 a=a8osWtB7k1t7Eqxv:21 a=G1B6sVe6ZA-a2k2h:21 a=-FEs8UIgK8oA:10 a=NWVoK91CQyQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=hxQmRmZaj7Kc3H0CF-Px:22 From: "Ernest Christley echristley@att.net" Received: from sonic316-9.consmr.mail.gq1.yahoo.com ([98.137.69.33] verified) by logan.com (CommuniGate Pro SMTP 6.2.13) with ESMTPS id 12873251 for flyrotary@lancaironline.net; Thu, 22 Aug 2019 13:13:30 -0400 Received-SPF: none receiver=logan.com; client-ip=98.137.69.33; envelope-from=echristley@att.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1566493993; bh=LAWUcZ0/2EoQDK2GyWmc0cvYQRAnLDogvmk1vn8UJ6Y=; h=Date:From:Reply-To:To:In-Reply-To:References:Subject:From:Subject; b=L5TXQVYV3NzgKRG8ixOv63DPQHzrQ1CG1Ut6Lu8P0a+pYDS7zU/DzC88MtA9lvDT5Yia5lLyf4sTqzpXDJ41LscjuO8uaMt/RG+Ecmx5OibPRL+cfHS2K4LR4uNr3w/C7DHB71RVsH2cm+qlSHM+ev6qmgdYfk87gTqcEDgQeok= X-YMail-OSG: yyxmL7kVM1kFias7r.WyLNZgqfKF2vj0BQWwrO12c86SlRfWh1PyyiAO0ZPrASq 1OxWUcMN4FHAUhZNT47etFLzC97yuYPGsFWKQQ4htzxJF2krmHuJysNyfHzJXIloJLVHHZbqn25P qsJ9wDraFHGPiRRz_FsdAhgFTDy6V3I79V0H5I.nuNbzyQdP.V5moQ8xZt9DtbdP91uanLmWpwOt yemLG9wlxx18Uak3tvLSnCra5OgV0WPyhYbrGpSrrJWeaDa3.n9WNuDcuATm65NRGKabBVHJu1OF mcrW_7YlYsr4eYruWwP5WHLSp__bjdytT0zrIPb0qBXmF2qyDwKgRKKOFh6uerciZ61w4HTd3jlQ d21Jjvz1wgZP8JNDWAI5GuzPrVjRvRRiZjUJQV0x6JeztaqUi04a4nP.jWvvsCNxmsEDsu8sJlyZ ob1Nzzr5ZIxsjHvpTBCZc0ZQp.Y43V6FaDxLr9GwvxgaUsoC6hPS4.K6oAdmBLpknVGaAPf4sCJW SnB0LJJQssDvtzuhI_a48a_0oGbThCOCi.13XIDgdkMz2L5a_vDRMFYOUMGNNokePdrVfRGa0Bl9 uWj479kbmsW90fcFmLERTp4GiaswY_DzReLFy5AwVFAuBTntQ8w04BH9ezT2eDtwOf_toQfWT0_f Ywz_FU6FHuVKDYe8PNBx_nB00tzEsJ0Pe4n7iEflaCG3koLGudCN9BNOn9bSoNAiejQPjboVGusg JDLiwKWoYHHLLyds7z1gg7iW3gO5FTR_NdK13wGZGTZW2NAyNp3AB1HvDhshd0irYdu49RQmXlb9 UvzpzNQT4FOXSIA3EjBgzVv9SBdmup0RkL6xrxa8nMUu3dgUlAvA8UudbiH0L.qrWxP7qtiMw4QJ 7WOWafJv_kWEkl8BVH4hJyZNNKzpS49U7qx7XiYwsy3v9JRyO9fq.pnuakC3TYsDZYN_eqScttNV Y6IDprQ5PbPSNd5_bXnXUlLFCeIZEdJRdocp9ScAc9hw_2WTGCS13URfNDFYL67xytff4yn5qDJp Gegxts0.Pd0Voqq598SV5BQ5jx7o0WUqSCojag3_VboZiMI8KKv4ASsJ_zQ6OkgEtfOcosKsoAfY adzVu.40CYbghENBtKjvzZsTKQ7G1cYM_tZByd8qLS9LRPyR7TQC5xLCTGFmOwsZ1MNeK_QiVTiz RjwAe0R1xY3dcCXwcct7HfXz3qziDt2eeT3ioUUKPXLVFZLnhnPN6FlZ80.QHJG3DYxtT4V_8O4U ErilAY9.DPPEGoVoqBYG._uLgr53S2w.BIjDHRQNvrgRq Received: from sonic.gate.mail.ne1.yahoo.com by sonic316.consmr.mail.gq1.yahoo.com with HTTP; Thu, 22 Aug 2019 17:13:13 +0000 Date: Thu, 22 Aug 2019 17:13:08 +0000 (UTC) Reply-To: "echristley@att.net" To: Rotary motors in aircraft Message-ID: <1245273504.977923.1566493988021@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] Re: Curved aluminum radiators. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_977922_1174206816.1566493988020" X-Mailer: WebService/1.1.14219 YahooMailAndroidMobile YMobile/1.0 (com.yahoo.mobile.client.android.mail/5.32.0; Android/7.1.2; 5.572VZ.13.c; E6810_3GB; KYOCERA; E6810; 4.97; 1920x1080;) Content-Length: 8741 ------=_Part_977922_1174206816.1566493988020 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable There bikes can make 200Hp, but how long can a rider use the power? The sma= ll radiator requirements may be deceptive. Sent from Yahoo Mail on Android=20 =20 On Thu, Aug 22, 2019 at 11:29 AM, jay bendlin drhyed@yahoo.com wrote: I think if you start exploring motorcycle cool= ing you may find some solution. Most sportbikes have been making 120-200+ h= p for 20 years now and most use curved rads, and many sport touring and end= ro type bikes have unique cooling solutions, if you start doing google imag= e searches you will probably find ideas left and right. I had a Honda RC-51= that used very small (in my opinion) side-mounted radiators, you could als= o look at Honda VFR radiators (came in several engines sizes 750-800), also= small side mounts but they were not curved. Its amazing how much horsepowe= r can be cooled with such small frontal area, but that's where engineers ea= rn their keep.=C2=A0=C2=A0 On Thursday, August 22, 2019, 10:44:58 AM EDT, Rob McMillan robmcmillan= pls@gmail.com wrote: =20 =20 $148=C2=A0to cut one open would suck, but might it be worth knowing before= getting 2 more and doing a bunch of ducting... On Thu, Aug 22, 2019, 2:32 AM Todd Bartrim bartrim@gmail.com wrote: I'm considering making some changes to my cooling system as it is not adequ= ate when flying low & slow, as on recent flights on a few hot days. I'm sti= ll using a set of evap cores as they fit the limited space on either side o= f the PSRU in an RV cowl.=C2=A0 Bill Jepson made mention of a curved radiat= or earlier this summer, which as been simmering on a hot spot way back in m= y brain ever since. I've spent the last few days looking real hard at the i= dea.The size and shape of the curve looks like it would conform quite nicel= y to the bottom of the RV cowl. so that the top of the rad would be perpend= icular to the airflow while the bottom will curve away. This would require = a new ducts to be glassed to take advantage of this, but that would allow f= or more time and room to slow down the airflow for greater efficiency. It w= ould also almost double the square inches of cooling area than I currently = have, however as it is thinner it would provide half of the cubic inches of= volume as I currently have.=C2=A0The small thick rads I currently use were= chosen more with high speeds in mind (well, and of course ease of installa= tion), but now I'm thinking that I'd rather have a thinner rad that would p= erform better on the ground and in slow flight. These curved rads seem like= they could offer some advantages.=C2=A0 I've just found them listed on Ama= zon.ca for $148CAD with free shipping (x2)which seems pretty resonable, so = for $300, it might offer a significant cooling upgrade.... or maybe not.I w= ish I could find an old one to cut open to inspect, test weld, check for fi= t, etc. Does anybody have any thoughts on the idea? I'm on the edge so it wouldn't = take much to push me over, or pull me back.... Todd Bartrim =20 ------=_Part_977922_1174206816.1566493988020 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable There bikes can make 200Hp, but how long can a rider use the power? The sma= ll radiator requirements may be deceptive.


On Thu, Aug 22,= 2019 at 11:29 AM, jay bendlin drhyed@yahoo.com
<flyrotary@lan= caironline.net> wrote:
I think if you start exploring motorcycle cooling = you may find some solution. Most sportbikes have been making 120-200+ hp fo= r 20 years now and most use curved rads, and many sport touring and endro t= ype bikes have unique cooling solutions, if you start doing google image se= arches you will probably find ideas left and right. I had a Honda RC-51 tha= t used very small (in my opinion) side-mounted radiators, you could also lo= ok at Honda VFR radiators (came in several engines sizes 750-800), also sma= ll side mounts but they were not curved. Its amazing how much horsepower ca= n be cooled with such small frontal area, but that's where engineers earn t= heir keep.  

=20
=20
On Thursday, August 22, 2019, 10:44:58 AM EDT, Rob McMi= llan robmcmillanpls@gmail.com <flyrotary@lancaironline.net> wrote:


= $148 = to cut one open would suck, but might it be worth knowing before getting 2 = more and doing a bunch of ducting...

On Thu, Aug 22, 2019, 2:32 AM Todd Bartrim= bartrim@gmail.com <flyrotary@lancaironline.net>= wrote:
I'm considering making some changes to my coolin= g system as it is not adequate when flying low & slow, as on recent fli= ghts on a few hot days. I'm still using a set of evap cores as they fit the= limited space on either side of the PSRU in an RV cowl.
  Bill Je= pson made mention of a curved radiator earlier this summer, which as been s= immering on a hot spot way back in my brain ever since. I've spent the last= few days looking real hard at the idea.
The size and shape of th= e curve looks like it would conform quite nicely to the bottom of the RV co= wl. so that the top of the rad would be perpendicular to the airflow while = the bottom will curve away. This would require a new ducts to be glassed to= take advantage of this, but that would allow for more time and room to slo= w down the airflow for greater efficiency. It would also almost double the = square inches of cooling area than I currently have, however as it is thinn= er it would provide half of the cubic inches of volume as I currently have.=
 The small thick rads I currently use were chosen more with= high speeds in mind (well, and of course ease of installation), but now I'= m thinking that I'd rather have a thinner rad that would perform better on = the ground and in slow flight. These curved rads seem like they could offer= some advantages.
  I've just found them listed on Amazon.ca= for $148CAD with free shipping (x2)which seems pretty resonable, so for $3= 00, it might offer a significant cooling upgrade.... or maybe not.
I wish I could find an old one to cut open to inspect, test weld, check f= or fit, etc.

Does anybody have any thoughts on the= idea? I'm on the edge so it wouldn't take much to push me over, or pull me= back....

Todd Bartrim
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