Question: An airplane weighs 60,000 N and has a wingspan of 17 m. A 1/10th-scale model is tested, flaps down, in a compressed-air tunnel at 15 atmospheres pressure and 15?C at various speeds. The maximum lift on the model is measured at the various speeds, with the results as given:
Estimate the minimum flying speed of the aircraft at sea level (i.e., the speed at which the maximum lift of the aircraft is equal to its weight).