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Weather finally cooperated and was able to do some flight testing with the new oil cooler assembly. Now that temps are under control, I can push the airplane. Using a Sensenich wood W64ZK-51 cruise prop.
WOT, 3,140 rpm, 143mph, 130knots, 6,370'. Oil temp 177F, hottest CHT 275F. My EGT's continue to run hot, hmm.
That run was after I had leveled off. Next picture is the climb out of KBDN, 3,500' elevation. This is 2 minutes into a full power climb, hottest CHT 315F (157C), Oil still warming up, it peaked at 192F (89C). CHT's stayed below 315F (157C) during the 3,000' climb.
Last picture, I was do some slow flying on the way back to the airport. 2,000 rpm, oil temp 163F (73C), pressure 51, hottest CHT 244F (118C). The picture also reveals the "Oil Cooler" cable below the fuel gauge, this controls a damper behind the oil cooler to restrict airflow to increase oil temps. It's in the full open position. Keep in mind, this is not the stock oil cooler installation.
The flight test went extremely well. It was the first flight I had done without any concern for engine temps, even after running it hard. Jabiru engines are air and oil cooled. Cool oil will lower CHT's.
Next on the list, Version 3+ of the Engine Cooling Plenums (ECP), these replace the Ram air ducts. The current version is a mix of ideas that need to be merged and expanded. This next version, to be installed this week, is all metal and should provide even better engine cooling. Should have some new numbers this weekend.