Aerodynamics & Aircraft Performance Flashcards
7 cards from real Aviation practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aerodynamics & Aircraft Performance flashcards as text
What four factors affect aircraft performance at takeoff?
Answer: Density altitude, aircraft weight, wind, and runway surface/slope
Density altitude, aircraft weight, wind direction/speed, and runway surface condition and slope are the primary factors affecting takeoff performance.
What is density altitude?
Answer: Pressure altitude corrected for non-standard temperature
Density altitude is pressure altitude corrected for non-standard temperature; it represents the air density equivalent to a standard atmosphere altitude.
An aircraft's POH states a ground roll of 1,000 feet under standard conditions. If density altitude is significantly higher than field elevation, what should the pilot expect?
Answer: A longer ground roll because the aircraft needs higher true airspeed to lift off
At high density altitude, thinner air requires the aircraft to reach a higher true airspeed before lift-off, resulting in a longer ground roll.
How does a headwind affect takeoff performance?
Answer: It decreases ground roll by adding to the aircraft's airspeed relative to the air
A headwind provides additional airspeed relative to the air mass, allowing the aircraft to reach lift-off speed at a lower ground speed and shorter ground roll.
What is the best rate-of-climb speed (Vy) used for?
Answer: Gaining the greatest altitude in the shortest time
Vy (best rate of climb) provides the greatest altitude gain per unit of time, maximizing vertical speed in feet per minute.
What is the significance of Vx (best angle of climb speed)?
Answer: It provides maximum altitude gain per horizontal distance traveled
Vx provides the greatest altitude gain per unit of horizontal distance, making it ideal for clearing obstacles after takeoff.
If an aircraft's weight is increased, what happens to its stall speed?
Answer: Stall speed increases because more lift is required to support the greater weight
A heavier aircraft requires more lift to remain airborne, which means a higher minimum airspeed (stall speed) is needed to generate that lift.