From: "Jeff Whaley jwhaley@datacast.com" <flyrotary@lancaironline.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RE: Using Fluidyne oil coolers as Primary Radiator
Thread-Topic: Using Fluidyne oil coolers as Primary Radiator
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Date: Tue, 31 Jul 2018 18:57:41 +0000
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Charlie: Yeah my drawing isn't too good -- done free-hand with a mouse in "=
paint" ...
Kelly: That is a great looking rad and hose options kit from Rywire ...
Steve: I remember your write-up on the Vee belly radiator and scoop but not=
 sure if your air is entering at the wide end of Vee (I think yes because o=
f hose connectors visible) ... I'm thinking of similar except under the cow=
ling.  I don't have a metal under-belly for attachment nor the airspeed of =
your RV, so with the same setup your machine would have 1.5 - 1.7 times the=
 cooling capacity.  Like WWII fighters with V12 liquid-cooled engines, it a=
ppears that efficient cooling relies on airspeed as much as anything else.
Jeff

Mine's on the side. When I flipped the angle, I was able to move the rad af=
t quite a bit, which gave me more room to tilt out (down, for you?) at the =
front. Regardless of tilt,  your bottom drawing's dashed line is much close=
r to what worked for me. Except mines a relatively smooth curve all the way=
 to the inlet. It's worth playing with the cardboard & tape to find the mos=
t effective curve. My 1st effort, which was after Tracy's advice, still had=
 nowhere near enough pinch at the aft end. I had to fill back there with sp=
ray foam and re-contour quite a bit. Once I got even flow across the core, =
I glassed over the new foam.

I hate to keep saying this, but mine hasn't flown. I know the air flow is e=
ven across the face of the core, but I really don't know how *much* air is =
flowing. But it is scaled fairly closely to what Tracy did in the RV-8/20B =
install, so I'm hopeful.=20

Charlie

-----Original Message-----
From: Jeff Whaley=20
Sent: July-31-18 12:04 PM
To: 'Rotary motors in aircraft'
Subject: RE: Using Fluidyne oil coolers as Primary Radiator

Yes, I did consider tilting the front end down Vs up but what I remember is=
 there becomes an interference with the 90 degree 1.5 inch hose connections=
 into the radiator as they get up against the engine and mount ... it looks=
 better from the "French curve" diffuser aspect ... the drawing isn't to sc=
ale either so there is also a limit to the down-tilt before the cowling get=
s really ugly.
Jeff