SIFT Army Aviation Information Practice Test correct answers

A helicopter is correct answer A type of rotorcraft Helicopter turbine engines produce ___________ thrust per pound than piston engines correct answer More The four main forces working on a helicopter are correct answer Lift, weight, thrust, drag Helicopters typically have between ___ and ___ main rotor blades correct answer 2 and 6 Depending on the type of helicopter, main rotor system components can include correct answer A stabilizer bar, upper/lower swashplates, counterweights, pitch horns, teeter/coning hinges, blade grips, pitch/scissor links, 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, a collective, throttle, 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 correct answer Profile drag is usually defined as the sum of form drag(Shape of the object) and skin friction(imperfections)