WHY IS IT IMPORTANT THAT LIFT BE EQUAL ON BOTH SIDES OF THE HELIC...

40. - File thứ 1: De va dap an thi thu lan 2, Anh
Tiếng Anh File thứ 1: De va dap an thi thu lan 2, Anh
40. Why is it important that lift be equal on both sides of the helicopter shaft? A. It allows the rotor blade angles to be changed. B. Equal lift means that the helicopter will be faster. C. Dissymmetry of lift makes helicopters fly well. D. If there is more lift on one side, the helicopter will flip.