Chris,
My experience has been that mine cools
much better with the cowl off. Of course, when I ran that way it was much
cooler, about 60 degrees. At that temp, with the cowl off, I had trouble
getting the oil up to operating temp. Today, with the cowl on and temp in the
80s, my water temp climbed to about 220 and the oil to 185 after about 30 min.
I need to do some air pressure testing to see what I need to do to get more air
to go thru the radiator. I have already diverted some air from the oil cooler
to the radiator, so I need to see what the pressures are in front and behind
the two coolers.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Chris and Terria
Sent: Saturday, April 24, 2010
10:08 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: cooling
for ground runs
Right now, it is
off. Today was the first really high power run, and I want to do a couple
with the cowl off first. I can feed the hose in through the hole between
the cowl and firewall, so I can still get the cooling with the cowl on.
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Bill Bradburry
Sent: Saturday, April 24, 2010
7:55 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: cooling
for ground runs
Chris,
Are you doing your ground running with the
cowl on or off?
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Chris and Terria
Sent: Saturday, April 24, 2010
4:06 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: cooling
for ground runs
Here is how I solved
the high temperatures during ground runs. I bought $10 worth of stuff at
Lowes, ½ inch PVC, 90 and 45 angles, end caps, and misters for spraying plants
in the garden (two in the oil cooler, three for the water cooler). I
hooked it up to the hose, and although water flowed all over the ground, the
engine remained within limits.
Before, I could get
about 4-5 minutes of high power. With this spray bar running, I had to
push the power up above 2500 RPM to get it to heat up above 135*, then after
about 8 minutes at high power, I was still only 185*.
Easy, cheap, and it
keeps the cooling system intact.
CHris