Sift Study Guide with Accurate Solutions
Which pitot-static instrument makes use of both pitot and static pressure? - ANS-
Airspeed indicator
the primary principle to counteract the main rotor torque with NOTAR - ANS-Coanda
effect
pilot,aircarft,enviorment,external pressures - ANS-What are the four elements of risk
management
While transitioning to forward flight at about 16 to 24 knots, the helicopter goes through
- ANS-effective translational lift
When a force is applied to one side of a spinning object, an action occurs approximately
90° in the direction of rotation from the point where the force is applied. The action is
called - ANS-gyroscopic precession
the resultant lift is exactly equal to the weight - ANS-When the helicopter is in the state
of hover
the flow of air going down through the rotors - ANS-Induced Flow or Downwash is
is the increased efficiency of the rotor disk caused by the interference of the airflow
when near the ground. - ANS-In-ground effect (IGE)
In forward flight, the tail rotor continues to push to the right, and the helicopter makes a
small angle with the wind when the rotors are level and the slip ball is in the middle. -
ANS-inherent sideslip
a line is drawn halfway between the upper and lower surfaces of the airfoil - ANS-Mean
Camber Line
Cushion of air between helicopter and ground is gone so more power is needed to
hover/move up. - ANS-out of ground effect
Since the fuselage of the helicopter, with a single main rotor, is suspended from a single
point and has considerable mass, it is free to oscillate either longitudinally or laterally in
the same way as a pendulum. This behavior is called - ANS-pendular action
rotors are tilted backward, thrust sends the helicopter to the rear - ANS-During rearward
flight,
Which pitot-static instrument makes use of both pitot and static pressure? - ANS-
Airspeed indicator
the primary principle to counteract the main rotor torque with NOTAR - ANS-Coanda
effect
pilot,aircarft,enviorment,external pressures - ANS-What are the four elements of risk
management
While transitioning to forward flight at about 16 to 24 knots, the helicopter goes through
- ANS-effective translational lift
When a force is applied to one side of a spinning object, an action occurs approximately
90° in the direction of rotation from the point where the force is applied. The action is
called - ANS-gyroscopic precession
the resultant lift is exactly equal to the weight - ANS-When the helicopter is in the state
of hover
the flow of air going down through the rotors - ANS-Induced Flow or Downwash is
is the increased efficiency of the rotor disk caused by the interference of the airflow
when near the ground. - ANS-In-ground effect (IGE)
In forward flight, the tail rotor continues to push to the right, and the helicopter makes a
small angle with the wind when the rotors are level and the slip ball is in the middle. -
ANS-inherent sideslip
a line is drawn halfway between the upper and lower surfaces of the airfoil - ANS-Mean
Camber Line
Cushion of air between helicopter and ground is gone so more power is needed to
hover/move up. - ANS-out of ground effect
Since the fuselage of the helicopter, with a single main rotor, is suspended from a single
point and has considerable mass, it is free to oscillate either longitudinally or laterally in
the same way as a pendulum. This behavior is called - ANS-pendular action
rotors are tilted backward, thrust sends the helicopter to the rear - ANS-During rearward
flight,
