What is the landing ground roll distance (no obstacle)?

What is the landing ground roll distance (no obstacle)?

• A. 475 feet
• B. 350 feet
• C. 600 feet
• D. 525 feet

Answer: (A)

Landing ground roll is the distance the airplane travels after touching down until it comes to a stop on a level runway with no obstacles. It measures how quickly you can dissipate the aircraft’s kinetic energy once you’re on the runway, using brakes, spoilers, and reverse thrust as appropriate. In this scenario, the data for the aircraft in this configuration specify a ground roll of 475 feet under standard conditions (dry, level runway, no wind, no obstacles). That’s why this value is used—the chart reflects the expected deceleration from touchdown speed given the assumed conditions and propulsion/braking setup. The other numbers would require different conditions or configurations (heavier weight, wetter surface, less braking effectiveness, or wind effects), so they don’t match the scenario presented.

Landing ground roll is the distance the airplane travels after touching down until it comes to a stop on a level runway with no obstacles. It measures how quickly you can dissipate the aircraft’s kinetic energy once you’re on the runway, using brakes, spoilers, and reverse thrust as appropriate.

In this scenario, the data for the aircraft in this configuration specify a ground roll of 475 feet under standard conditions (dry, level runway, no wind, no obstacles). That’s why this value is used—the chart reflects the expected deceleration from touchdown speed given the assumed conditions and propulsion/braking setup. The other numbers would require different conditions or configurations (heavier weight, wetter surface, less braking effectiveness, or wind effects), so they don’t match the scenario presented.