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 significance of 'pressure altitude' versus 'density altitude' for aircraft performance calculations?
Answer: Density altitude is pressure altitude corrected for non-standard temperature and is the altitude at which the aircraft 'performs'
Density altitude is pressure altitude corrected for non-standard temperature conditions, reflecting the actual air mass density the aircraft experiences, which determines aerodynamic and engine performance.
When computing en route alternate fuel requirements for a dispatched flight, the dispatcher must ensure enough fuel to:
Answer: Fly from the point of diversion to the en route alternate and complete a normal approach and landing
En route alternate fuel must cover flight from the point of diversion to the alternate airport and complete an approach and landing, ensuring the flight can safely divert if needed.
What is the impact of increasing flap setting on takeoff performance?
Answer: Higher flap settings reduce V speeds and field length but reduce climb gradient, creating a tradeoff
Increasing flap setting lowers V speeds and reduces field length requirements, but the increased drag also reduces the climb gradient, requiring a balanced analysis for obstacle clearance.
For turbojet aircraft operating under 14 CFR Part 121, the landing distance at the destination must not exceed what percentage of the available runway length?
Answer: 60%
Under 14 CFR 121.195, the projected landing distance for a turbojet aircraft may not exceed 60% of the effective runway length at the destination airport.
Which regulatory reference governs en route limitations for turbine-powered airplanes under Part 121?
Answer: 14 CFR 121.191
14 CFR 121.191 establishes en route limitations for turbine-powered airplanes, including OEI terrain clearance requirements and the ability to continue or divert along the route.
What is meant by 'assumed temperature' or 'flex temperature' method in takeoff performance?
Answer: Using a temperature higher than actual OAT to compute a reduced thrust takeoff that remains within all performance limits
The assumed (flex) temperature method computes a reduced takeoff thrust setting by pretending the OAT is higher than actual, producing derated thrust that still meets all performance requirements at the actual conditions.
Which V-speed defines the speed below which the pilot must abort and above which the pilot must continue the takeoff after an engine failure?
Answer: V1
V1 is the takeoff decision speed; an engine failure recognized at or above V1 requires the crew to continue the takeoff, while a failure recognized below V1 requires an abort.