Lesson 1 Daily Basic Aerodynamics True or False Questions And Answers

Lesson 1 Daily Basic Aerodynamics True or False Questions And Answers True or False: An airfoil is any symmetrical or unsymmetrical surface designed to produce lift or thrust when air passes over it - ANS-True True or False: During any kind of horizontal or vertical flight there are four forces acting on the helicopter; lift, thrust, weight, and drag - ANS-True In order for the helicopter to maintain a stabilized hover in a no wind condition: - ANS-All four forces must balance out If thrust exceeds drag in straight and level flight, the helicopter does what? - ANS-Accelerates True or False: During rearward flight, the thrust component is rearward and drag forward, just opposite to forward flight - ANS-True Relative wind, as seen by the helicopter blade, may be affected by several factors. One of these factors is: - ANS-Horizontal velocity Induced flow Wind speed/direction Blade rotation The angle of attack is the: - ANS-The angle between the resultant relative wind and the chord line of the wing The disk area or the rotor disk is the: - ANS-The plane circular area swept through by the blades of a helicopter rotor A force which causes a reduction in rotor RPM when the angle of attack is increased is known as: - A