Flying_Monkey
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- Joined
- Sep 22, 2014
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Most of the flying I've done in the 9 months I've owned my plane has been lower altitude short hops through busy airspaces with many climbs and descents. Just now finally getting some 3+ hour cross country flights and experimenting with ROP and LOP settings and digging into the JPI 830 data.
I was wondering when running your Lycoming O-360 about 20 degrees LOP does it run a little rough? Mine can hit 20 LOP but is just a tad bit rough. 9500 feet, 2450 RPM, about 7.6 to 8 GPH, 65% HP and I can see the CHTs come down once on the lean side of peak. They are indeed lower than 100 ROP and my speed is about 5 knots less (exactly as per the POH).
So is a little roughness acceptable? What's actually going on in there to make that little less smoothness happen?
I have really enjoyed studying the POH and Lycoming manual and seeing predicted performance and metrics come to life with fairly great precision. SCIENCE!
I was wondering when running your Lycoming O-360 about 20 degrees LOP does it run a little rough? Mine can hit 20 LOP but is just a tad bit rough. 9500 feet, 2450 RPM, about 7.6 to 8 GPH, 65% HP and I can see the CHTs come down once on the lean side of peak. They are indeed lower than 100 ROP and my speed is about 5 knots less (exactly as per the POH).
So is a little roughness acceptable? What's actually going on in there to make that little less smoothness happen?
I have really enjoyed studying the POH and Lycoming manual and seeing predicted performance and metrics come to life with fairly great precision. SCIENCE!
