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Steve,
I am in
NSW but you have quite a few rotaries flying in WA especially to the south
around bunbury. What plane are you talking? I have a glastar with an
underneath heat exchanger, but depends where you are up to as to what you have
to “make” fit. Neil.
Sent: Tuesday, December 25, 2012 12:01 PM
Subject: [FlyRotary] Re: Cooling Duct design
Mark
What were your final dimensions:
Inlet water and oil
Exits
Exchanger sizes
Thanks
Steve Izett
On 24/12/2012, at 11:12 PM, Mark Steitle wrote:
Hi Steve,
Referring to the top view drawing, my guess is the majority of the air
would favor the top half of the core, starving the other half of air. I
think I would try to duplicate the long curved duct wall on both sides,
forming a trumpet shape nearest the core. On the side-view drawing, my
guess is the majority of the cooling air would pile up on the back/downwind
side. I would squeeze it down to almost nothing at the backside.
Then take some manometer readings and adjust as appropriate.
Be sure you have free space behind the radiator for the air to exit the
core, and adequate cowl opening(s). I had to add a cowl flap to my
Lancair, but it really helps during hot weather climb-outs. When up into
cooler air I usually close the cowl flap for reduced cooling drag.
Mark S.
Lancair ES - PP 20B - 258 hrs
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