Sift army - Study guides, Class notes & Summaries

SIFT Army Aviation Information Written Exam 2024. What part decrease crosswind thrust on the blades and enhance flight stability by keeping the bar stable as the rotor spins - correct answer The flybar 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...

Airfoil - 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 an...

SIFT Army Aviation Information Review Practice Test Exam 2024. A helicopter is A type of rotorcraft - correct answer A helicopter is A type of rotorcraft Helicopter turbine engines produce more thrust per pound than piston engines - correct answer Helicopter turbine engines produce more thrust per pound than piston engines The four main forces working on a helicopter are Lift, weight, thrust, drag. - correct answer The four main forces working on a helicopter are Lift, weight, thrust, dr...

SIFT Army Aviation Information Final Test Guide 2024. skidding - correct answer An aerodynamic condition, during a turn, where the tail of an aeroplane moves away from the centre of the turn or tends to follow a path which is outside that followed by the nose. slipping - correct answer an aerodynamic condition of uncoordinated flight in which an aeroplane moves towards the inside of a turn or is moving somewhat sideways as well as forward relative to the oncoming airflow. flapping - corre...

The phenomenon of a helicopter sinking into its own downwash is called: A. L/Wmin (minimum lift-to-weight ratio). B. An airfoil stall. C. Vortex torque state. D. Settling with power. - correct answer D. Settling with power. A helicopter is: A. A type of gyrocraft B. A type of rotorcraft C. A category of rotary-wing airplanes D. A sub-group of gyrocopters - correct answer B. A type of rotorcraft Helicopter turbine engines produce _________ thrust per pound than piston engines: A...

The four aerodynamics forces. - correct answer Thrust, Drag, Weight and Lift Thrust - correct answer The forward force produced by the power plant/propeller or rotor. It opposes or overcomes the force of drag. As a general rule, it acts parallel to the longitudinal axis. Drag - correct answer A rearward, retarding force caused by disruption of airflow by the wing rotor, fuselage, and other protruding objects. Drag opposes thrust and acts rearward parallel to the relative wind. Weight - ...

SIFT Army Aviation Information Test First Law of Motion - correct answer an object at rest will stay at rest, an object will remain in motion unless acted upon by an unbalanced force such as gravity or friction Four Types of Friction - correct answer 1) sliding, kinetic friction 2) fluid friction 3) rolling friction 4) static friction Sliding, Kinetic friction - correct answer results when the surface of one object slides along the surface of another object Fluid Friction - correct ...

SIFT Test Army Aviation Information Study Guide Test 2024. Helicopter structure - correct answer fuselage (body of aircraft), mast, rotor blades engine drives power up through mast to rotor blades main rotor generates thrust, tail rotor counteracts torque main rotor rotates counterclockwise (US, UK, Ger.) advantages of rotorcraft - correct answer rotor blades (produce lift w/o requiring helicopter to move forward) provide the ability to takeoff vertically, hover in one place, and ta...

Which of these is one of the three types of drag that constitute total drag? - correct answer Parasite. The force that resists the movement of a helicopter through the air and is produced when lift is developed is called drag. Drag must be overcome by the engine to turn the rotor. Drag always acts parallel to the relative wind. Total drag is composed of three types of drag: Profile, induced, and parasite Which of the following is common to all turbine helicopters, but is only on some pist...

SIFT Army Aviation questions with 100% correct answers graded A+ Airfoil - 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 answ...