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Exam (elaborations)

SIFT Exam with Complete Solutions

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SIFT Exam with Complete Solutions

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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

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