Aircraft Performance & Limitations Flashcards
7 cards from real DADE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aircraft Performance & Limitations flashcards as text
What is the primary purpose of the 'climb-limited' maximum takeoff weight analysis?
Answer: To ensure the aircraft can meet minimum climb gradient requirements with the critical engine inoperative
Climb-limited MTOW ensures that if the critical engine fails at V1, the aircraft can still meet the minimum climb gradient requirements for each segment of the takeoff flight path.
Under 14 CFR Part 121.631, a dispatcher may not release a flight unless the planned fuel is sufficient for which of the following minimums?
Answer: Destination plus all required alternates plus reserve as specified in the operations specifications
14 CFR 121.631 requires the dispatcher to ensure fuel sufficient to fly to the destination, all required alternates, and hold for the reserve fuel specified in the carrier's operations specifications.
How does runway slope affect takeoff performance?
Answer: An uphill slope increases ground roll because it reduces acceleration and increases distance needed to reach V1
An uphill runway slope works against the aircraft's acceleration, increasing the distance required to reach V1 and liftoff speed, while a downhill slope reduces the required field length.
When dispatching over mountainous terrain, which regulation requires operators to ensure the aircraft can sustain flight above the terrain with the critical engine inoperative?
Answer: 14 CFR 121.193
14 CFR 121.193 addresses en route limitations for turbine-powered aircraft specifically over mountainous terrain, ensuring OEI performance permits safe passage or a diversion.
What is the effect of CG (center of gravity) position on aircraft performance, and why does it matter for dispatch?
Answer: Forward CG increases drag slightly but improves stall characteristics; aft CG reduces drag but may approach stability limits affecting V-speeds
Forward CG increases induced drag due to higher stabilizer download but improves pitch stability, while aft CG reduces drag and improves fuel burn but can approach stability limits that affect V-speed calculations and handling margins.
What limitation does the 'tire speed rating' impose on dispatch performance calculations?
Answer: It sets the maximum groundspeed at which the aircraft may lift off the runway
Tire speed ratings set the maximum groundspeed at which tires can safely operate; this can limit the maximum weight dispatched to certain runways where liftoff groundspeed would otherwise exceed the tire rating.
A dispatcher is planning a flight to an airport that does not have an available weather report or forecast. Under 14 CFR 121.619, the dispatcher must:
Answer: File an alternate airport even if the destination would otherwise not require one
When a weather report or forecast is not available for the destination, 14 CFR 121.619 requires that an alternate airport be designated in the dispatch release regardless of expected conditions.