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Cool Oil Temperatures
I own a '65 Cessna Skyhawk with a Lycoming O-360-A1A turning a constant
speed prop. I recently read an article in the Cessna Pilot's Association on too high of oil temperatures, but that is not my case. I have been in contact with them and they also suggest I get the wisdom of the NG. The oil temperature does not get anywhere near 180F even during the summer. I have calibrated the temperature bulb by placing it in a bath of oil along with a DMM thermometer and heating the oil to 180F and marking the glass on the instrument. This is a factory OH engine with about 200 hours on it, but the old engine (2000 hrs) did the same thing. At CPA suggestion I placed a oil cooler restrictor plate that cut down the airflow opening to 1/3. This is modeled after the C-172M. My oil cooler is mounted on the back left baffle above the cylinder. I went flying the other day and it did not seem to affect the temperature at all from not having it at all. The 180F mark is in the middle (straight up) and the reading was 1/2 way between the bottom of the green and the 180F mark. The outside air temp was about 70F. Hey, its been warm here in North Texas. I was running about 65% power. Any ideas from this collective group. Ross Richardson a0452593 at ev1 dot net (that is ev one, not little L) |
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