DQ-126

Question 1

A mechanical mixing unit provides control mixing functions which minimizes inherent control coupling. 
What are the four types of mechanical mixing and their functions?

Answer 1

Collective to -

• • Pitch (Comp. downward flow on stab)
• • Roll (Comp transelating tendency)
• • Yaw (Comp changing TQ effect)

Yaw to Pitch

• Comp for changes in the vertical thrust component of the canted t/r

Question 2

What is the purpose of Collective/Airspeed to Yaw (Electronic Coupling) and what controls it?

Answer 2

• It has the ability to decrease tail rotor pitch as airspeed increases and the tail rotor and cambered fin become more efficient. As airspeed decreases, the opposite occurs.
• The SAS/FPS computer commands the yaw trim actuator to change tail rotor pitch as collective position changes. The amount of tail rotor pitch change is proportional to airspeed.
• Maximum mixing occurs from 0 to 40 knots. As airspeed increases above 40 knots, the amount of mixing decreases until 100 knots, after which no mixing occurs.

Question 3

What does FPS provide in the pitch, roll, and yaw axis above/below 60 KIAS?

Answer 3

Question 4

What are the four ways of performing a coordinated turn?

Answer 4

• Changing reference roll attitude by pressing the STICK TRIM switch in the desired lateral direction.
• Pressing TRIM REL switch on the cyclic grip and establishing the desired bank angle with feet off pedal switches.
• Exerting a lateral force on the cyclic stick to achieve the desired bank angle, and then neutralizing the force with the STICK TRIM switch.
• Keeping a lateral force on the cyclic stick for the duration of the turn.

Question 5

Proper operation of FPS requires which systems to be operating? What system will improve FPS performance?

Answer 5

• BOOST, TRIM, and SAS 1 and/or SAS 2
• Proper operation of the stabilator in the automatic mode.

Question 6

Given these departure conditions what is the Maximum Hover Height and explain how is it calculated?

• TEMP
 35 Degrees
• PA
 2000’
• ACFT WGT 22000lbs
• MAX TQ AVAIL 108% (DE)

Answer 6

• Use Hover chart (P-65 in CL)
  
  • 35 feet ish

Question 7

In the context of Risk Management explain the terms Probability and Severity and which step of the risk assessment process they apply to.

Answer 7

• Probability is the likelihood an event will occur;
  
  • Frequent,
  • Likely,
  • Occasional,
  • Seldom,
  • Unlikely.
• Severity is the expected consequences of an event in terms of injury, property damage, or other mission-impairing factors.
  
  • Catastrophic,
  • Critical,
  • Moderate
  • Negligible
• STEP 2 - ASSESS THE HAZARDS