12-13 12. An airplane with wings surface area of 812.5 m2 is cruising in the air...
An Airbus A380-800 passanger airplane is cruising at constant altitude on a straight line with a constant speed. The total surface area of the two wings is 395 m^2. The average speed of the air just below the wings is 248 m/s, and it is 276 m/s just above the surface of the wings. What is the mass of the airplane? The average density of the air around the airplane is ρair = 1.29 kg/m^3.
7.) A Cessna 152 is a small airplane with a mass of 725 kg and a wing area of 15.0 m. It the wings are designed so that the air flows 13.5% faster above the wings than below, then what is the minimum cruising speed of the plane? (You can make the assumption that all the litt force comes from this difference in air flow.)
A small jet airplane has a total wing area of 77.5 m2 and a mass of 7.03 x 104 kg (a) If this jet is in horizontal flight, determine the pressure difference between the lower and upper surfaces of the wings Pa (b) When the speed of air traveling over the wing is 237 m/s, determine the speed of air under the wing. Use 1.29 kg/m3 as the density of air. m/s (c) Why do all aircraft have a maximum...