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30 Cards in this Set

  • Front
  • Back
What are the two main purposes of the AFCS and ASE?
Automatic flight control and stabilization
systems ease the pilot’s workload and provide
aircraft stability at all speeds
What is an airfoli?
An airfoil is any part of an aircraft designed
to produce lift.
When the pressure on both sides of the airfoil is nearly equal, what happens to the airfoil?
Turbulence causes the pressure on both surfaces
to become nearly equal, and the airfoil is said to
On a fixed-wing aircraft, what control
surface corrects for yaw?
As fuel is used, what must the pilot reduce
to lessen lift and prevent a gain in altitude?
Angle of attack on the wing
How does the pilot increase lift in a
helicopter with a constant speed rotor?
By increasing the airfoil’s angle of attack
(blade pitch)
When does the action called coning take
When the pilot applies collective to the
main rotor.
What two types of altitude signals can the
AFCS use to maintain a constant altitude?
Radar and barometric altimeter signals.
Why is the AFCS synchronized with the
flight controls before engaging the AFCS?
To prevent sudden and violent maneuvers
upon engagement
What unit is considered the heart of the
The air navigation computer.
What AFCS component provides signal
outputs representing yaw, pitch, and roll
Three axis rate gyro.
What type of heading signal does the AFCS
receive from the compass/INS system?
A clutched heading signal.
What are the two modes of operation for
electrohydraulic servo actuators?
Manual and AFCS engaged.
What unit of the AFCS sends a signal that
acts as a follow-up to flight control
Surface position transmitter.
What AFCS mode automatically dampens
oscillations in the yaw, pitch, and roll axes?
Stability augmentation mode.
Name the three major systems that make up the AFCS for helicopters.
Stability augmentation system, stabilator
system, and digital automatic flight control
How much flight control authority is there when only SAS 1 is engaged?
5-percent control authority.
What is the primary purpose of the stabilator system?
To stop undesirable noseup attitudes.
When is the stabilator system TEST push button operational?
When airspeed is below 50 knots.
What is the purpose of the DAFCS inner-loop control system?
To improve helicopter stability.
What is the rate limit of the DAFCS trim actuators?
10 percent per second.
What is the effective altitude range for the DAFCS radar altitude hold mode?
0 to 5,000 feet.
What is the rate of decent when the helicopter is less than 50 feet above the approach profile?
120 feet/minute.
What subsystems make up the ASE couple system?
The Doppler radar system and the vertical velocity system.
When the ASE HOVER TRIM is engaged, hover trim control is transferred from the pilot to the ______________________
The crew member at the hoist position
How many degrees will one rotation of the ASE YAW TRIM knob turn the helicopter?
72 degrees.
What ASE component allows the sonar operator to maintain the cable angle perpendicular, relative to the horizon?
The cable angle control panel.
What does the ASE hover indicator show during an automatic transition from forward flight to hover?
Speed drift and rate of descent
How many stick trim valves does the ASE have?
Two, one for pitch and one for roll.
What are the four basic channels of operation for the ASE?
Pitch, roll, collective, and yaw.