I've been looking at the performance charts for the Lycoming O-320-B and D series
engines. There's a line that is labeled "Limiting manifold pressure for continuous
operation". This line starts at sea level and 2400 rpm, runs through 2300 rpm at
about 2,000' ASL, and continues to 2000 rpm at about 6,500' ASL. Does this mean that
I am not supposed to operate this engine at 2000 rpm below 6,500' ASL? I have a fixed
pitch prop.

George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to have
been looking for it.