Podcast
Questions and Answers
What is the relationship described by pitch direct law?
What is the relationship described by pitch direct law?
What happens to the maximum elevator deflection as the CG shifts?
What happens to the maximum elevator deflection as the CG shifts?
What does the pilot need to adjust since there is no automatic trim available?
What does the pilot need to adjust since there is no automatic trim available?
What is displayed on the PFD when manual pitch trim is needed?
What is displayed on the PFD when manual pitch trim is needed?
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Which function is inoperative under pitch direct law?
Which function is inoperative under pitch direct law?
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What is displayed when MAN PITCH TRIM is activated in the presence of elevator faults( L + R )
What is displayed when MAN PITCH TRIM is activated in the presence of elevator faults( L + R )
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Under what condition does Vsw replace Vα prot and Vα max?
Under what condition does Vsw replace Vα prot and Vα max?
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What does an amber 'USE MAN PITCH TRIM' indication in flare law signify?
What does an amber 'USE MAN PITCH TRIM' indication in flare law signify?
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When is MAN PITCH TRIM ONLY displayed in red?
When is MAN PITCH TRIM ONLY displayed in red?
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Study Notes
Pitch Direct Law
- Pitch direct law has a direct link between stick and elevator position; elevator movement is directly proportional to stick movement.
- Maximum elevator deflection varies based on the aircraft's center of gravity (CG).
- Controllability is optimal at forward CG and less sensitive at aft CG; this design is a compromise.
- No automatic trim system; pilots must use manual trim.
- A "USE MAN PITCH TRIM" amber message appears on the primary flight display (PFD) when the direct law is active.
- All pitch protection systems are disabled when pitch direct law is engaged.
- The alpha floor function (stall protection) is also disabled.
- Alternate law (another pitch control system) provides overspeed and stall warnings.
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Description
Explore the fundamentals of pitch direct law in aviation. This quiz covers the relationship between stick and elevator positions, the impact of center of gravity on elevator deflection, and the manual trim system pilots must use. Understand the implications of disabling pitch protection systems during direct law engagement.
