steve
   sounds great. something to think about. if get to a point where you think you have enough cooling a 170-180 degree thermostat would be nice to stabilize the system. as you know i have run a thermostat since day one.
                       paul brannon


--- On Sat, 8/9/08, Steve Brooks <cozy4pilot@gmail.com> wrote:

> From: Steve Brooks <cozy4pilot@gmail.com>
> Subject: [FlyRotary] 2nd flight on the new cooling system
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Date: Saturday, August 9, 2008, 1:58 PM
> I took the Cozy up this morning for the 2nd flight on the
> new cooling
> system.  The OAT was 3 or 4 degrees warmer than the first
> flight, as it was
> 79 F when I took off.
> This time, I turned the cooling fan on while I was taxiing
> out to the
> runway.  After the  taxi and pre-flight checks, the oil was
> 135 F and the
> coolant was still reading pretty low.  Maybe 115 to 120 or
> so.  It is a
> little hard to read the analog gauge down on the low end of
> the scale.
>
> I took off and climbed up to about 1300 FT AGL, at which
> time I pulled the
> throttle back some and continued a cruise climb.  The
> coolant was showing
> about 190F, and I didn’t think to check the oil
> temperature.  Oil
> temperature has not been my issue.  It has always been the
> coolant.  The
> coolant temperature did still increase a little, even at
> the reduced power,
> but just up to 200 F.  I was close to a low cloud layer at
> about 1800 AGL,
> so I throttle back some more and dropped the nose to level
> flight.  I also
> turned off the cooling fan to see what the temperature
> would do on it’s own.
> The temperature steadily dropped to about 180 degrees
> within just a few
> minutes, and then stabilized there.
>
> I cruised around for a little while, flew over my house and
> circled it once,
> and then headed back to the airport.  With the low cloud
> layer that had
> moved in, I really didn’t know if it was going to clear
> out or get thicker,
> so I flew the 5 minutes back to the airport, and made a
> normal landing.  As
> I was ready to throttle back to descend about 800 feet to
> pattern altitude,
> and quick check of the coolant temperature showed about 160
> degrees.  Not
> bad at all, although I was probably flying at about 60%
> power.  Still, it
> would have not been nearly that low before the new cooling
> system.
>
> Once I landed and was clearing the runway, I checked the
> temperatures again,
> and the coolant was less then 140 degrees after the glide
> in to land.  Since
> I planned to wash the plane, and sometimes it starts hard
> after getting heat
> soaked sitting after a run, I turned on the cooling fan
> while a taxied over
> to the where the wash area is.  After washing the plane, it
> started up
> pretty easily, so I guess that worked out also.
>
> So far so good.  I like what I see so far on the radiator,
> and the cooling
> fan definitely gives me a lot more options.
>
> Steve Brooks
> Cozy N75CZ
> 13B turbo to read the an