← All explained questions · Supplemental · IV — Takeoffs, Landings, and Go-Arounds
Best ANGLE of climb (Vx) is used to
Choices
climb fastest in distance covered over ground.
Fastest distance = highest groundspeed, opposite of Vx.
✓ achieve the most ALTITUDE per unit of HORIZONTAL DISTANCE.correct
used for obstacle clearance after takeoff. Slower IAS than Vy but steeper climb path. Vx = best angle of climb = max altitude per horizontal distance. Use to clear obstacles. Slower than Vy. Vy = best rate of climb = max altitude per time. Use for normal climb when no obstacle limit. Both are published in POH. Vx becomes Vy at the absolute ceiling (single-engine ceiling for twins).
achieve the most altitude per unit of TIME (use Vy for that).
That's Vy.
save fuel.
Fuel savings comes from cruise efficiency, not climb.
Why
used for obstacle clearance after takeoff. Slower IAS than Vy but steeper climb path. Vx = best angle of climb = max altitude per horizontal distance. Use to clear obstacles. Slower than Vy. Vy = best rate of climb = max altitude per time. Use for normal climb when no obstacle limit. Both are published in POH. Vx becomes Vy at the absolute ceiling (single-engine ceiling for twins).
FAA source: PHAK Ch 11, AFH Ch 5; PHAK Chapter 11 — Aircraft Performancebrowse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.