Available horsepower and adding drag to an airplane both create extra lift? How is that possible?
According to the Zenith, available horsepower not used to overcome form drag and induced drag contributes to rate of climb.
NASA's report on the X57, states that drag might need to be added to get rid of excess thrust to create more lift.
From the conclusion of that NASA report on span-wise propellers generating lift:
A potential constraint on the design of the high-lift propellers system is the total thrust. If large amounts of lift augmentation are required from the propellers, then high thrust values from the high-lift propellers are likely. If these propellers produce excess thrust, then the aircraft will be unable to sustain flight at the desired speed. This implies that drag producing devices may need to be added to the aircraft or the primary propellers operated as windmills to produce additional drag.
This concept seems to be exactly opposite of the first concept!!
Rumours: Ultralights reach a max speed, any extra power is then converted to lift. Is this true?
How do these concepts work?