SIFT Army Aviation Exam Questions and
Answers 100% Pass
Airfoil - ✔✔Blade that cuts through air so that air passes above and below it
Top of an airfoil is ________ - ✔✔Cambered
Why is the top of an airfoil cambered? - ✔✔To allow air to quickly get past the airfoil
and create low pressure
What happens to the air below the airfoil? - ✔✔Has a shorter distance to travel and is
slower, creating high pressure
Lift - ✔✔Upward force created by the difference in air pressure above and below the
airfoil
angle of incidence (pitch angle) - ✔✔Angle between the cord line and the direction of
the rotors spin
Angle of Attack (AOA) - ✔✔Angle between the chord line and the direction of
incoming air
To create lift you need a ________ AOA - ✔✔Positive
How do you create a positive AOA - ✔✔Front of the blade needs to be raised above the
back, relative to the wind
What type of airfoil can generate lift with zero or negative AOA - ✔✔Cambered or
nonsymmetrical
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, Weight is an important factor in flight because: - ✔✔You need to generate enough force
to move the weight off the ground, thus requiring more lift
What 3 factors can cause a change in weight mid-flight? - ✔✔Strong winds, adverse
weather conditions, banking
What is the most frequent factor that causes a change in weight mid-flight? -
✔✔Banking the helicopter
As the angle of a bank increases, what also needs to increase? - ✔✔The angle of the
airfoil which will produce more lift
Load factor (G load) - ✔✔Added strain created by banking and increasing the angle of
the airfoil
G load equation - ✔✔G = L1 / L0
G - ✔✔Load factor
L1 - ✔✔Actual load on the rotor blades
L0 - ✔✔Resting or normal load of the helicopter
Thrust - ✔✔Force that moves the helicopter horizontally
How do you create thrust? - ✔✔Converting lift via alterations of the pitch angle and the
AOA
Drag - ✔✔Opposing force to thrust
What are the 3 subcategories of drag? - ✔✔Profile, parasitic, and induced
Parasitic drag - ✔✔Increases with airspeed and is the dominate type of drag at high
airspeeds
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
Answers 100% Pass
Airfoil - ✔✔Blade that cuts through air so that air passes above and below it
Top of an airfoil is ________ - ✔✔Cambered
Why is the top of an airfoil cambered? - ✔✔To allow air to quickly get past the airfoil
and create low pressure
What happens to the air below the airfoil? - ✔✔Has a shorter distance to travel and is
slower, creating high pressure
Lift - ✔✔Upward force created by the difference in air pressure above and below the
airfoil
angle of incidence (pitch angle) - ✔✔Angle between the cord line and the direction of
the rotors spin
Angle of Attack (AOA) - ✔✔Angle between the chord line and the direction of
incoming air
To create lift you need a ________ AOA - ✔✔Positive
How do you create a positive AOA - ✔✔Front of the blade needs to be raised above the
back, relative to the wind
What type of airfoil can generate lift with zero or negative AOA - ✔✔Cambered or
nonsymmetrical
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Weight is an important factor in flight because: - ✔✔You need to generate enough force
to move the weight off the ground, thus requiring more lift
What 3 factors can cause a change in weight mid-flight? - ✔✔Strong winds, adverse
weather conditions, banking
What is the most frequent factor that causes a change in weight mid-flight? -
✔✔Banking the helicopter
As the angle of a bank increases, what also needs to increase? - ✔✔The angle of the
airfoil which will produce more lift
Load factor (G load) - ✔✔Added strain created by banking and increasing the angle of
the airfoil
G load equation - ✔✔G = L1 / L0
G - ✔✔Load factor
L1 - ✔✔Actual load on the rotor blades
L0 - ✔✔Resting or normal load of the helicopter
Thrust - ✔✔Force that moves the helicopter horizontally
How do you create thrust? - ✔✔Converting lift via alterations of the pitch angle and the
AOA
Drag - ✔✔Opposing force to thrust
What are the 3 subcategories of drag? - ✔✔Profile, parasitic, and induced
Parasitic drag - ✔✔Increases with airspeed and is the dominate type of drag at high
airspeeds
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
