Endurance not at Best L/D
Was taught that the best glide speed = best range speed and it happens at the best lift/drag ratio (lowest point on the drag vs air speed curve).
Also taught that the best endurance is the cross of the parasite drag and induced drag curves. Okay so I can see how you can get best endurance from the lowest of the summation of the parasite and induced drag at a particular airspeed.
But how can you explain that the best endurance is not at the best lift/drag ratio point on the drag vs airspeed curve. And also the best endurance speed requires more power than the best range speed?