flyrotary@lancaironline.net Mailing List Archive

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Actually, Steve, I do have a bit less area for the core inlets. I decreased the inlet area from my original 48 sq inches total for the two coolant cores to 28 sq inches for an approx 40% decrease in area. That worked OK but at WOT the temps would approach 200F, so I plan on opening it back up to around 38 sq inches.

----- Original Message -----

From: Steve BRooks

To: Rotary motors in aircraft

Sent: Monday, November 29, 2004 8:35 AM

Subject: [FlyRotary] Re: high oil temps must end

Ed,

This is very close to what I ended up with on my plane, which finally got my temperatures down. Actually, I'm about 48 sq in on the coolant, and 25 sq in on the oil.

I am running a stock 89-91 turbo setup, which is rated at 200 HP (at 6000 rpm's I beleive).

I don't know what horsepower you are running now with your "C" drive, but I would guess that it's pretty close to what I'm running with the turbo.

I would also think that you could get by with a little less inlet area, since the tractor configuration is bound to be more efficient getting cooling air in and out.

Steve Brooks

Ed Anderson Wrote:

My conclusion is my current 28 sq inch for core inlets is a bit on the small side for the C drive and high RPM/power. I intend to increase it to a total of 38 sq inch from the current 28 for coolant but leave the oil at 24 sq inch.