X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=Ifz5plia c=1 sm=1 tr=0 a=2f/BrsI30kxfi1RG7K8GXg==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=x7bEGLp0ZPQA:10 a=xXDCcK6TKBsA:10 a=FmdZ9Uzk2mMA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=djemcrw3AAAA:8 a=on22okXAAAAA:8 a=JoQWYm39AAAA:8 a=7g1VtSJxAAAA:8 a=r9IklUsW9sTcHPCszr0A:9 a=5xGRhX_hvAlEOKOo:21 a=7hEp2M4czk2FIiHf:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=vzmvyzVvtopH6fOTykgA:9 a=beapN11VMFNrxOfm:21 a=yGIAtQoGhjfi8-oY:21 a=tmst0FoMsj394iAk:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=rUixLVA0M3wEG775Z1vR:22 a=NPqpj5bUEVj9vR1HIonK:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Todd Bartrim bartrim@gmail.com" Received: from mail-ed1-f44.google.com ([209.85.208.44] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 12893550 for flyrotary@lancaironline.net; Wed, 28 Aug 2019 01:17:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.44; envelope-from=bartrim@gmail.com Received: by mail-ed1-f44.google.com with SMTP id h8so1490497edv.7 for ; Tue, 27 Aug 2019 22:17:59 -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=aIzi7/2rRyag0EDSqWT1Sh2ukFvLZa1K84G6fKkkxuw=; b=uB9mxU8miPPrgAMmSaUYA5EYAXCXLR8zQkF+/SdfCsJ7N45Av0tOQVwXf7IhADC6TE CYEpmDzqteRHRU+kTMdC0c2UCdUw3CdfGU45i+y9F3IS/TNcMD2Y5AJZobaPGttGGnrx Zwb5NcdDhaur3X9ixhlExqTE+GBjTUIRNfPhMw7Tb6cOZOEVRWdvpHpip4oEjm91dL0y Xa2fDM4xW8hCRyU6s/DFgKoMqNf0KVogCkVPjRWAw3AUmxf+Eh0yvMvpdq2ET3qywn6o zLbagoP8NOSnZRuOk8/JjvfVShSl+6Ojm2kRl6uZCRZ42ZgpRj5XAa8/3fX9Lr07uNvh gP+w== 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=aIzi7/2rRyag0EDSqWT1Sh2ukFvLZa1K84G6fKkkxuw=; b=FFusqj5EvfuFYA/+9DlotoMvs/K/r4VhCMoahizAEDF7bupB+/gMozlKDe8m6UXmvQ 2FPr3oJoSkPtjJvR09tyzLeq02EEVCwnIW2XiaORX9VomU6D/ppJsasRUR//vKV3KXTB znJcNynrFNRUjc8kf+8NOhhxePfpypM5bVyAbwRmYsNGjLQmi6knfdjnKxAWkWXWyqSO RM5KLj0DZa72I6TUoMIfV6pgozJ8SCArpHEo/nK9ZxadS7T2QV/oSvZD9y6BEuKlwpMu hgYVnjtMvNSWmz0GXFFDMq7jETx+rohj1L8xZAiO21gz4zIwGx421YlnIUTuE9kn+OJ0 55Wg== X-Gm-Message-State: APjAAAVkk5zUSMnVBDEPKiOC1Y0vvUzteIetdlWYWw9UE/bdTOrj0/RW haIjeRPN+js9rfEomqgEsA3jH/MXqTra8ffqvMFdCYM= X-Google-Smtp-Source: APXvYqy7R/3JHRC6f1kWAlQPq56oESjofhPKVQKykkHc9nx/FS5XYGPdVoq7CwpEpJwdkCADQ4szKn1dJZT8G36+V/8= X-Received: by 2002:a17:906:454d:: with SMTP id s13mr1471342ejq.159.1566969460764; Tue, 27 Aug 2019 22:17:40 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Tue, 27 Aug 2019 22:17:25 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Curved aluminum radiators To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000001531fd0591268241" --0000000000001531fd0591268241 Content-Type: text/plain; charset="UTF-8" Hi Bill; I took a bit of time and did a bit of searching and I had more confirmation that my memory isn't as sharp as it should be.... Everette's fatal crash was not rotary related, it was the Mistral crash that I was thinking of and it was not fatal and was apparently caused by a muffler failure, not an oil cooler. So what did happen to Powersport? Todd Bartrim On Tue, Aug 27, 2019 at 8:47 AM William Jepson wrjjrs@gmail.com < flyrotary@lancaironline.net> wrote: > Le Roux, That wasn't the final setup that I described. Rather it was an > earlier less effective one. > Todd, Everette's crash wasn't caused by a cooler. Not an engine related > failure. > Bill > > On Tue, Aug 27, 2019 at 1:17 AM Le Roux Breytenbach > breytenbachleroux@gmail.com wrote: > >> Todd/Jeff This is a link that i has got on the old Powersport "Set Up" >> >> http://www.redbackaviation.com/powersports-rebirth-rotary-engine/ >> >> There is a picture of the oilcooler and radiator set up >> This is all i can get >> >> On Mon, Aug 26, 2019 at 2:28 PM Jeff Whaley jwhaley@datacast.com >> wrote: >> > >> > 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 either >> side of the PSRU in an RV cowl. >> > Bill Jepson made mention of a curved radiator earlier 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 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 would >> 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 >> 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 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 >> > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --0000000000001531fd0591268241 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Bill;
=C2=A0 I took a bit of time and did a bit of = searching and I had more confirmation that my memory isn't as sharp as = it should be....
Everette's fatal crash was not rotary relate= d, it was the Mistral crash that I was thinking of and it was not fatal and= was apparently caused by a muffler failure, not an oil cooler.
S= o what did happen to Powersport?=C2=A0

=
Todd Bartrim


On Tue, Aug 27, 20= 19 at 8:47 AM William Jepson wrjjrs@gma= il.com <flyrotary@lan= caironline.net> wrote:
Le Roux, That wasn't the final setup tha= t I described. Rather it was an earlier less effective one.
Todd, Evere= tte's crash wasn't caused by a cooler. Not an engine related failur= e.
Bill=C2=A0

On Tue, Aug 27, 2019 at 1:17 AM Le Roux Breyt= enbach bre= ytenbachleroux@gmail.com <flyrotary@lancaironline.net> wrote:
=
Todd/Jeff This is a link = that i has got on the old Powersport "Set Up"

http://www.redbackaviation.com/powe= rsports-rebirth-rotary-engine/

There is a picture of the oilcooler and radiator set up
This is all i can get

On Mon, Aug 26, 2019 at 2:28 PM Jeff Whaley jwhaley@datacast.com
<flyrot= ary@lancaironline.net> wrote:
>
> Todd, just catching up on the blog after a week of vacation ... my mai= n thought is that doubling your Surface AREA will have far more positive af= fect 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 either side of the PSRU in an RV cowl.
>=C2=A0 =C2=A0Bill Jepson made mention of a curved radiator earlier this= summer, which has been simmering on a hot spot way back in my brain ever s= ince. 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 nice= ly to the bottom of the RV cowl. so that the top of the rad would be perpen= dicular 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 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 o= f volume as I currently have.
>=C2=A0 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 o= n the ground and in slow flight. These curved rads seem like they could off= er some advantages.
>=C2=A0 =C2=A0I've just found them listed on Amazon.ca for $148CAD w= ith 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, chec= k 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:=C2=A0 http://www.flyrotary.com/
> Archive and UnSub:=C2=A0 =C2=A0http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html

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