Steve, my setup will cool on the ground <80 F OAT provided that engine rpm is </= 3000 with zero wind; it will do a bit better than that if airplane is taxiing or there is a strong breeze.
Both my oil air intake and radiator air intake plenums are within a few inches of the prop.
If you open the throttle during stationary ground operation you should expect it to overheat. Stationary engine dynamometers have HUGE radiators/coolers with ducted fans.
Jeff
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From:
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Neil Unger <flyrotary@lancaironline.net>
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Subject:
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Re: [FlyRotary] Cooling
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Date:
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Wed, 21 Jan 2015 07:39:29 +1100
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To:
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Rotary motors in aircraft <flyrotary@lancaironline.net>
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Steve, I can run full noise on the ground with no heating problems, but then I do have 900 cub inches of cooling. 600 for water and 300 for oil. I did insist that PWR make a rad
that WILL cool. It does regardless of OAT. I had to put a thermostat in to get the water over 60 degrees. I have too much cooling. Neil.
-----Original Message----- From: steve Izett
Sent: Tuesday, January 20, 2015 6:35 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Cooling
Hi Guys
So what are your experiences of running on the ground.
Do your setups cool on the ground at any throttle setting?
I’m still not in a position to open the throttle as Im in a garage at home.
After start and running at about 1500RPM (engine) with an OAT 90+
temps slowly rise till i shut it down before it gets past 210F.
This takes probably 20 Minutes.
What do you guys see on the ground in your various climates and cooling setups?
Steve Izett
Perth Western Australia
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