Mass 900 kg Number of rotors 18 Rotor radius 1.15 m Number of blades per rotor, B 2 blade chord, c 0.09 m profile drag coefficient, cd 0.01 Equivalent flat-plate drag area, f 1.2 m (a) The VoloCity website advertises that the aircraft will have a maximum cruise speed of 30 m/s at an altitude of 1000 ft (use p = 1.2 kg/m). Using appropriate assumptions, find the thrust required per rotor and the rotor angle of attack (a) required for these forward, level-flight conditions. Estimate the induced velocity, v, the induced power, and the parasite power.