SIFT Army Aviation Information Practice Test Study Guide with Correct Answers

SIFT Army Aviation Information Practice Test Study Guide with Correct Answers A helicopter is - Answer-A type of rotorcraft Helicopter turbine engines produce ___________ thrust per pound than piston engines - Answer- More The four main forces working on a helicopter are - Answer-Lift, weight, thrust, drag Helicopters typically have between ___ and ___ main rotor blades - Answer-2 and 6 Depending on the type of helicopter, main rotor system components can include - 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 - 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 _____ - Answer-On the tail boom The purpose of the tail rotor is: - Answer-To produce an anti-torque force acting perpendicular to the helicopter's longitudinal axis. Wheels on _____ types of helicopters are _____ - Answer-Some, retractable A pilot controls a helicopter using: - Answer-Pedals, a collective, throttle, cyclic EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISH SEPTEMBER 2024 Page 2/4 From a physics perspective, the _____ force is deemed to act through a helicopter's _____ - Answer- Total weight, center of gravity When a pilot banks a helicopter, causing it to turn, _____ - 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 - Answer-Airfoils, a pressure differential Thrust acts _____ to the aircraft's _____ - Answer-Parallel, longitudinal axis Profile drag consists of - Answer-Profile drag is usually defined as the sum of form drag(Shape of the object) and skin friction(imperfections) Vortices produced by spinning rotor blades create - Answer-Induced drag When plotted on a graph, L/DMAX is the point where the helicopter's _____ - Answer-Total lift-to- drag ration is the greatest