Sift army - Study guides, Class notes & Summaries
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SIFT Army Aviation exam 2023 with 100% correct answers
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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...
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SIFT Army Aviation Information Review Practice Test Exam 2024.
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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...
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SIFT Army Aviation Information Final Test Guide 2024.
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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...
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SIFT Army Aviation Test exam 2023 with 100% correct answers
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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...
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SIFT Army test exam 2023 with 100% correct answers
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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 - ...
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SIFT Army Aviation Information Test fully solved graded A+ 2023
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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 ...
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Sift Army Aviation exam 2023
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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...
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SIFT Army Aviation Questions well answered rated A+ 2023
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SIFT Army Aviation 
What are the 3 types of drag? - correct answer Parasite Drag, Induced Drag, Profile Drag 
 
Profile Drag - correct answer Type of drag caused by the separation of boundary layers and increased friction on airfoils. Dependent on the shape of the aircraft. 
 
Parasite Drag - correct answer Type of drag that acts on an object, creating friction when the object is moving through liquid (a.k.a, the atmosphere.) 
 
Induced Drag - correct answer Type of drag that occurs when airfoil...
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SIFT Army Aviation questions with 100% correct answers graded A+
- Exam (elaborations) • 11 pages • 2023
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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...
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SIFT Test Army Aviation Information Study Guide Test 2024.
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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...
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