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Posted for "Tracy Crook" <lors01@msn.com>:
----- Original Message -----
Wrom: XCAXZOWCONEUQZAAFXISHJEXXIMQZUIVOTQN
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, November 23, 2002 11:09 PM
Subject: [FlyRotary] Re: Air Temp Rise through oil cooler
> Today I'm going to measure the outlet air from the right side
> evaporator core. Ed Andersen is going to be doing similar
> measurements on his planeand it will be interesting to compare the
> results.
Tracy Crook
Interesting "real world" info, Tracy. Thanks. Please keep it coming. Don't
bother giving Paul you're data. If it doesnt fit his theoretical model -
it's wrong.
John Slade
I've about given up posting test results to Paul's newsletter. Regardless
of the results, his conclusion is always that my "cooling system does not
work very well" and that I have "cooling problems", (overheats) and that
evaporator cores will never work well.
I must confess that todays' tests did show a cooling problem, I couldn't get
the oil temp where I like (180 deg). The OAT was 55 degrees and oil temp at
cruise was only 155. It would have been even lower but the Mazda oil
cooler has a built in thermostat which bypasses the oil cooler when oil
temp is lower than 158.
Todays' test was to measure the air temp differential between air inlet and
backside of radiator on right side. Cruise delta was 53 degrees (55 inlet
to 108 on back) and like the oil cooler data collected yesterday, this
number did not change much with cruise power setting.
In a 1000 FPM climb, The delta did increase to a maximum of 68 degrees (52
deg inlet air temp (altitude was higher on this measurement) to 120 deg. at
backside.
One reason the delta increased on climb is the geometry of my right side air
inlet. Airflow is split between oil cooler and radiator on this side and at
increased angle of attack, more air is diverted to the oil cooler and less
to the radiator. The delta may be a bit less on the left side rad since it
has a much cleaner inlet and better pressure recovery. I'll measure it in
the next test.
Tracy Crook
PS to Marv, I think you have both of my email addresses on the distribution
list since I get two copies of every message. When you get a chance, see
if you can just use tcrook@rotaryaviation.com and not use lors01@msn.com
Thanks for running this newsletter!
Tracy
[no problem... I'll pull the msn address immediately. <M> ]
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