From: "Le Roux Breytenbach breytenbachleroux@gmail.com" <flyrotary@lancaironline.net>
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Date: Tue, 27 Aug 2019 09:58:14 +0200
Message-ID: <CAL0y4-3Rrk86G-UoobuvUBGkt3yJjbdtXf8DJ60VJMtkLbQ6oA@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Curved aluminum radiators
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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
<flyrotary@lancaironline.net> wrote:
>
> Todd, just catching up on the blog after a week of vacation ... my main t=
hought is that doubling your Surface AREA will have far more positive affec=
t 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 ade=
quate when flying low & slow, as on recent flights on a few hot days. I'm s=
till 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, whic=
h has been simmering on a hot spot way back in my brain ever since. I've sp=
ent 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 perpendic=
ular 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 wou=
ld also almost double the square inches of cooling area than I currently ha=
ve, however as it is thinner it would provide half of the cubic inches of v=
olume as I currently have.
>  The small thick rads I currently use were chosen more with high speeds i=
n 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 advantag=
es.
>   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 significa=
nt 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....
>
> --
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