SIFT Army Aviation Information questions with 100% correct answers 2023

SIFT Army Aviation InformationA helicopter is: - correct answer A type of rotorcraft Helicopter turbine engines produce _________ thrust per pound than piston engines: - correct answer more The main forces acting on a helicopter are: - correct answer Lift, weight, thrust, and drag Helicopters typically have between __ and __ main rotor blade(s): - correct answer 2, 6 Depending on the type of helicopter, main rotor system components can include: - correct answer A stabilizer bar, upper and lower swashplates, and counterweights. Pitch horns, teeter or coning hinges, and blade grips. Pitch and scissor links, and control rods. The function of the flybar is: - correct answer To decrease crosswind thrust on the blades and enhance flight stability by keeping the bar stable as the rotor spins Many helicopters have a horizontal stabilizer located: - correct answer On the tail boom The purpose of the tail rotor is: - correct answer To produce an anti-torque force acting perpendicular to the helicopter's longitudinal axis Wheels on ______ types of helicopters are ________: - correct answer some, retractable A pilot controls a helicopter using: - correct answer Pedals, and a collective, throttle, and cyclic From a physics perspective, the ______ force is deemed to act through a helicopter's __________: - correct answer total weight, center of gravity When a pilot banks a helicopter, causing it to turn, ___________________________: - correct answer The machine's weight increases. In the case of helicopters, lift is produced by ________ moving through the air at a speed sufficient to create _______________: - correct answer airfoils, a pressure differential. Thrust acts ________ to the aircraft's ________________________: - correct answer parallel, longitudinal axis. Profile drag consists of __________ created by __________ and __________: - correct answer form drag and skin friction Vortices produced by spinning rotor blades create: - correct answer Induced drag. When plotted on a graph, L/DMAX is the point where the helicopter's _____________. - correct answer Total lift-to-drag ratio is the greatest. A helicopter's potential energy is affected by: - correct answer The aircraft's height above the ground. Which of the following factors affect the lift produced by spinning rotor blades: - correct answer Airfoil coefficient of lift. Air density. Blade area. What happens when a helicopter's main rotor blades spin rapidly? - correct answer The upper and lower sides of each blade experience a difference in pressure. Newton's Third Law of Motion applies to helicopters because: - correct answer The spinning main rotor makes the aircraft try to spin in the opposite direction. When the pilot pushes the cyclic forward: - correct answer The main rotor disk tilts forward. Multi-engine helicopters have: - correct answer A throttle lever for each engine. When the pilot wants the helicopter's nose to move left or right, he or she: - correct answer Pushes on