An MAV is designed as a disk wing, which is driven by a propeller. The circular disk wing has a diameter of 10 cm. The design velocity is 15 m/s. The propeller is driven by an electric motor and has...

An MAV is designed as a disk wing, which is driven by a propeller. The circular disk wing has a diameter of 10 cm. The design velocity is 15 m/s. The propeller is driven by an electric motor and has an efficiency of 60%. The lift and drag coefficients of the wing are 1.5 and 0.1, respectively. The device is designed for a total mass of 100g. Determine the capacity in mAh of a battery for a flight endurance of 20 minutes. The battery supplies a voltage of 3.3V. Air density is assumed to be 1.118 kg/m3 .