midlifeflyer Posted January 30, 2019 Report Posted January 30, 2019 4 minutes ago, Fred₂O said: I tried this Sunday. The O360 in the C won't turn the prop at 2350 rpm with 15" of MAP. It took something like 17", which resulted in about 85-90 kt with gear down while on the final descent. At some point that's what happens. Not enough MP to turn the prop at higher rpm. If you think about it, we encounter that on every flight when we do our run up. Basically, prop is full forward and throttle acts like it does with a fixed pitch propeller. (I've heard of instructors teaching descent to landing like this - targeting, say 1700 RPM like a Cherokee rather than, say 12" MP. Not a fan, but it actually works)
Hank Posted January 30, 2019 Report Posted January 30, 2019 5 hours ago, Fred₂O said: I tried this Sunday. The O360 in the C won't turn the prop at 2350 rpm with 15" of MAP. It took something like 17", which resulted in about 85-90 kt with gear down while on the final descent. Our Cs don't have the power of Ned's E. For any given speed, we need more power than him, until he finally outruns us. I run ~16"/2300 and finetune the speed from there, adding a couple inches when dropping Takeoff Flaps. Dropping the gear makes for a good descent, after a brief pause . . . 1
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