An XV-15 tilt-rotor plane (see Figure 3.30) is maintaining position in hovering flight. If...

An XV-15 tilt-rotor plane (see Figure 3.30) is maintaining position in hovering flight. If the plane has mass of 5000 kg and the rotors have diameter of 7.6 m, estimate the downwash velocity of the air from the rotors. State any assumptions you make.

FIGURE 3.30 Picture of an XV-15 experimental tilt-rotor aircraft. Courtesy of NASA Dryden Flight Research Center.