SIFT Army Aviation question n answers graded A+ 2023

SIFT Army AviationAirfoil - correct answer Blade that cuts through air so that air passes above and below it Top of an airfoil is ________ - correct answer Cambered Why is the top of an airfoil cambered? - correct answer To allow air to quickly get past the airfoil and create low pressure What happens to the air below the airfoil? - correct answer Has a shorter distance to travel and is slower, creating high pressure Lift - correct answer Upward force created by the difference in air pressure above and below the airfoil angle of incidence (pitch angle) - correct answer Angle between the cord line and the direction of the rotors spin Angle of Attack (AOA) - correct answer Angle between the chord line and the direction of incoming air To create lift you need a ________ AOA - correct answer Positive How do you create a positive AOA - correct answer Front of the blade needs to be raised above the back, relative to the wind What type of airfoil can generate lift with zero or negative AOA - correct answer Cambered or nonsymmetrical Weight is an important factor in flight because: - correct answer You need to generate enough force to move the weight off the ground, thus requiring more lift