AE 3&2 CH. 8
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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 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
What is the primary purpose of the stabilator
To stop undesirable noseup attitudes.
What is the rate limit of the DAFCS trim
10 percent per second
What unit is considered the heart of the
The air navigation computer.
When does the action called coning take
- When the pilot applies collective to the
- main rotor.
What AFCS mode automatically dampens
oscillations in the yaw, pitch, and roll axes?
Stability augmentation mode.
What are the four basic channels of operation
for the ASE?
- Pitch, roll,
- collective, and yaw.
On a fixed-wing aircraft, what control
surface corrects for yaw?
What two types of altitude signals can the
AFCS use to maintain a constant altitude?
Radar and barometric altimeter signals.
When is the stabilator system TEST push button
When airspeed is below 50 knots
What ASE component allows the sonar operator to
maintain the cable angle perpendicular, relative to the horizon?
The cable angle control panel.
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.
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 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
What is the rate of decent when the helicopter
is less than 50 feet above the approach profile?
Why is the AFCS synchronized with the
flight controls before engaging the AFCS?
- To prevent sudden and violent maneuvers
- upon engagement
What is the effective altitude range for the
DAFCS radar altitude hold mode?
0 to 5,000 feet
What is the purpose of the DAFCS inner-loop
To improve helicopter stability.
As fuel is used, what must the pilot reduce
to lessen lift and prevent a gain in altitude?
Angle of attack on the wing
What type of heading signal does the AFCS
receive from the compass/INS system?
A clutched heading signal.
What unit of the AFCS sends a signal that
acts as a follow-up to flight control
Surface position transmitter.
What are the two modes of operation for
electrohydraulic servo actuators?
Manual and AFCS engaged.
What does the ASE
hover indicator show during an automatic transition from forward flight to
Speed drift and rate of descent
What AFCS component provides signal
outputs representing yaw, pitch, and roll
Three axis rate gyro.
What is an airfoli?
- An airfoil is any part of an aircraft designed
- to produce lift.
How many degrees will one rotation of the ASE
YAW TRIM knob turn the helicopter?
How many stick trim valves does the ASE have?
Two, one for pitch and one for roll.
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