SIFT 2025-2026 Exam with Complete
Solutions
engine - ANSWER-What creates power
Tail rotor - ANSWER-What balances thurst
counterclock wise - ANSWER-USA. UK. Germany uses what rotation
secondary rotor for counter torque - ANSWER-Single main rotor
blades spin counter, allows speed - ANSWER-tandem rotor
stacked blades, counter spin, allows greater payload/greater - ANSWER-Coaxial rotor
main rotor - ANSWER-Thrust is created by
mast and rotors - ANSWER-how is thrust transferred into motion
sufficient thrust - ANSWER-what is needed to overcome drag and weight to keep the
heli moving forward
frictional resistance of the passing through the air - ANSWER-Profile drag
form drag and skin friction - ANSWER-Profile drag has two components, what are they
the speed of the helicopter increases - ANSWER-Form drag increases when
the speed of the helicopter decreases - ANSWER-form drag decreases when
microscopic roughness of the helicopter blades - ANSWER-skin friction is caused by
airflow circulation around the blades creating vortices - ANSWER-Induced drag
when the helicopter is flying at low speeds - ANSWER-When is induced drag increased
when the helicopter is flying at high speeds - ANSWER-when is induced drag
decreased
induced drag - ANSWER-main type of drag on a helicopter at low speeds
Solutions
engine - ANSWER-What creates power
Tail rotor - ANSWER-What balances thurst
counterclock wise - ANSWER-USA. UK. Germany uses what rotation
secondary rotor for counter torque - ANSWER-Single main rotor
blades spin counter, allows speed - ANSWER-tandem rotor
stacked blades, counter spin, allows greater payload/greater - ANSWER-Coaxial rotor
main rotor - ANSWER-Thrust is created by
mast and rotors - ANSWER-how is thrust transferred into motion
sufficient thrust - ANSWER-what is needed to overcome drag and weight to keep the
heli moving forward
frictional resistance of the passing through the air - ANSWER-Profile drag
form drag and skin friction - ANSWER-Profile drag has two components, what are they
the speed of the helicopter increases - ANSWER-Form drag increases when
the speed of the helicopter decreases - ANSWER-form drag decreases when
microscopic roughness of the helicopter blades - ANSWER-skin friction is caused by
airflow circulation around the blades creating vortices - ANSWER-Induced drag
when the helicopter is flying at low speeds - ANSWER-When is induced drag increased
when the helicopter is flying at high speeds - ANSWER-when is induced drag
decreased
induced drag - ANSWER-main type of drag on a helicopter at low speeds