X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=T4/ysMCQ c=1 sm=1 tr=0 a=fBpEYY1kl5IeR6+UsC6mGA==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=x7bEGLp0ZPQA:10 a=ad1WmcueCrwA:10 a=FmdZ9Uzk2mMA:10 a=3oc9M9_CAAAA:8 a=Ia-xEzejAAAA:8 a=JoQWYm39AAAA:8 a=7g1VtSJxAAAA:8 a=LbxKc530yqra14BeUV4A:9 a=hoDJH7kpoWht-5Cr:21 a=SjCAw0MXpgjzYMkj:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=DCKbgPhMMfQITvNaoNgA:9 a=0ZIJ_b1Tpuv2qXPB:21 a=_709vB_alRGFc4MY:21 a=mCWjv5zPEJL77sxS:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "William Jepson wrjjrs@gmail.com" Received: from mail-ed1-f49.google.com ([209.85.208.49] verified) by logan.com (CommuniGate Pro SMTP 6.2.13) with ESMTPS id 12885816 for flyrotary@lancaironline.net; Mon, 26 Aug 2019 16:29:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.49; envelope-from=wrjjrs@gmail.com Received: by mail-ed1-f49.google.com with SMTP id g24so900863edu.3 for ; Mon, 26 Aug 2019 13:29:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=+fCZRFlAX8k0tZIrLTQ/UWLwhhvQjzo9TYianSqNAzM=; b=IJquaun0uag14nJC/Mus27kWSijpkmP5hgnqKfz7PAeggmmnTeGLPmxUCzRff5rIcX H+mhdwldVJBJl8EYrhich5YT1Vdp9ot7VJBtkqrfay7/Ckp2SYdVN+sBr6udbjnSHG7E /4sRloL1nvXY6hLRLwELgNQolHxXrb0VsK0lB+wq7gXahuTjLSvpUJh9p+7ckkgTBBbQ r5FesLyZyHI7RBEyU0oYLGRpq3QzzTD2eQ3TIjnKFQMu9cULGz5luFubqrUuRV45WOFH C52YtmYklyLnwJPuExwvGZVJf9jVsecvHlvCNjEjodobIlq2VqjBzPhgV2eh794inaGu 0yCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=+fCZRFlAX8k0tZIrLTQ/UWLwhhvQjzo9TYianSqNAzM=; b=VNpq24XJ8SpbyhhSi2FjaFADjRxS8YEQYkTv322KIk3hijrv24Xw4xK/5R6+Q+HOWv +gtI9WZXPSR867F9NwaORnidJ2bh2317SrLqYUEDEwnltFm+zvhrkgbwBLT04YnqYvSr NqG8bxVZLbBVK6X5yeL7UHtuKzNH+AN29UuGIisfbQF/ebqCtWESaiUomiesaN+hmYYn WedHrQNw4vovdSWFq7SKRqG5EVSQs672aqTXwtj6vgO7WknvoQ/j+tJHtwu+jHLnSnRB qY++SHwV4pj2z2DWZ5oAcv6tjf/jo90ATFZCmWswPWZibPxIYCYTRSJcroVdb0DGpwsl +aOA== X-Gm-Message-State: APjAAAW4YMbz5EQGOese4FurfyGT2uyrKa/OzptEn1Ybme0XVKJqbl7T +PkMj3yahj7D1DbyV+BVwmJZ70iuB1NmQ4f6TwlDfw== X-Google-Smtp-Source: APXvYqyA56xGUpq7/ouWq+7FyMRGioM8Z6BdS7i6IgOxY2nN7nrBUGKXtq1nnVOrWszDEQgpUFM7WnetzhBnacSeJ3A= X-Received: by 2002:a17:906:5789:: with SMTP id k9mr18862370ejq.56.1566851364306; Mon, 26 Aug 2019 13:29:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 26 Aug 2019 13:29:13 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Curved aluminum radiators To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000fc423005910b02be" --000000000000fc423005910b02be Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Guys, I mentioned the curved radiators because some cowl contours will work with them. Note also that the original Powersport team came up with a excellent layout. 3 setrab type coolers in a splayed U. Tipped up just a little one cooler for oil at the bottom with two water radiators on the sides V=E2=80=99ed into the flat cooler on the bottom. All 3 are edge to th= e firewall. The baffling is at the front of the rads. Over all the cowl with the area between the rads open. Very little ducting is needed. The air flows into the center, out through the coolers, and out the bottom of the cowl in the standard position. This system needs a swirl pot to recombine the two water radiators. Run those parallel. This system was the last from the original Powersport and worked great. Bill Jepson On Mon, Aug 26, 2019 at 7:21 AM lehanover lehanover@aol.com < flyrotary@lancaironline.net> wrote: > I use three 44 tube SETRABS. Two in the scavenge loop and one in the > pressure loop. Under 200 degrees on a hot day. Sorry about the picture > quality. Lynn E. Hanover > > In a message dated 8/26/2019 8:20:58 AM Eastern Standard Time, > flyrotary@lancaironline.net writes: > > Todd, just catching up on the blog after a week of vacation ... my main > thought is that doubling your Surface AREA will have far more positive > affect than the negative effects of halving your CUBIC area ... cubic > inches of radiator is misleading - surface area is far more important. > Jeff > > I'm considering making some changes to my cooling system as it is not > adequate when flying low & slow, as on recent flights on a few hot days. > I'm still using a set of evap cores as they fit the limited space on eith= er > side of the PSRU in an RV cowl. > Bill Jepson made mention of a curved radiator earlier this summer, whic= h > has been simmering 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 the curve looks like it would conform quite nicely > to the bottom of the RV cowl. 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 wou= ld > allow for more time and room to slow 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 thinner 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 tha= t > 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 reasonable, so for $300, 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 > for 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.... > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --000000000000fc423005910b02be Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Guys, I mentioned the curved radiators because some = cowl contours will work with them. Note also that the original Powersport t= eam came up with a excellent layout. 3 setrab type coolers in a splayed U. = Tipped up just a little one cooler for oil at the bottom with two water rad= iators on the sides V=E2=80=99ed into the flat cooler on the bottom. All 3 = are edge to the firewall. The baffling is at the front of the rads. Over al= l the cowl with the area between the rads open. Very little ducting is need= ed. The air flows into the center, out through the coolers, and out the bot= tom of the cowl in the standard position. This system needs a swirl pot to = recombine the two water radiators. Run those parallel. This system was the = last from the original Powersport and worked great.
Bill Jepson=C2=A0

On Mon, Aug 26, 2019 at 7:21 AM lehanover lehanover@aol.com <flyrotary@lancaironline.net> wrote:<= br>
I use three 44 tube SETRABS. Two in the scavenge loop and one= in the pressure loop. Under 200 degrees on a hot day.=C2=A0 Sorry about th= e picture quality. Lynn E. Hanover

In a message dated 8/26/2019 8:20:58 AM Eastern Standard Time, flyrotary@lancaironlin= e.net writes:

Todd, just catching up on the blog after a week of vacatio= n ... my main thought is that doubling your Surface AREA will have far more= positive affect than the negative effects of halving your CUBIC area ... c= ubic inches of radiator is misleading - surface area is far more important.=
Jeff

I'm considering making some changes to my cooling syst= em as it is not adequate when flying low & slow, as on recent flights o= n a few hot days. I'm still using a set of evap cores as they fit the l= imited space on either side of the PSRU in an RV cowl.
=C2=A0 Bill Jepson made mention of a curved radiator earli= er this summer, which has been simmering 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 the curve looks like it would confor= m quite nicely to the bottom of the RV cowl. so that the top of the rad wou= ld be perpendicular to the airflow while the bottom will curve away. This w= ould require a new ducts to be glassed to take advantage of this, but that = would allow for more time and room to slow down the airflow for greater eff= iciency. It would also almost double the square inches of cooling area than= I currently have, however as it is thinner it would provide half of the cu= bic 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&= #39;m thinking that I'd rather have a thinner rad that would perform be= tter on the ground and in slow flight. These curved rads seem like they cou= ld offer some advantages.
=C2=A0 I've just found them listed on Amazon.ca fo= r $148CAD with free shipping (x2)which seems pretty reasonable, so for $300= , it might offer a significant cooling upgrade.... or maybe not.
I wish I could find an old one to cut open to inspect, tes= t weld, check for 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....

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Homepage:=C2=A0 http://www.flyrotary.com/
Archive and UnSub:=C2=A0 =C2=A0http://mail= .lancaironline.net:81/lists/flyrotary/List.html
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