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Should airplane takeoff with flaps?
Aircraft use takeoff flap settings that are roughly between 5-15 degrees (most jets use leading edge slats as well). Even for a Cessna 172S, 10 degrees of flaps are recommended for takeoff. Once the plane is off the ground, the flaps are retracted, the camber is reduced, and the aircraft accelerates to cruise speed.
What happens to aircraft take off performance at higher density altitudes?
as air density decreases (higher density altitude), aircraft performance decreases. A decrease in air density means a high density altitude; an increase in air density means a lower density altitude. However, a known density occurs for any one temperature and pressure altitude.
Which type oF jet engine is most efficient at the highest speeds?
Turbofans
Turbofans are the most efficient engines in the range of speeds from about 500 to 1,000 km/h (270 to 540 kn; 310 to 620 mph), the speed at which most commercial aircraft operate.
How does flap deflection work in high density altitude?
On most airplanes a small flap deflection (10 to 20 degrees) may increase lift without adding much drag. On others, the drag increase with flaps may be prohibitive. With flaps extended some airplanes may get off the ground sooner at high DAs, but initial climb (for clearing terrain or obstacles) may actually be reduced.
How are pilots adapt their takeoff plans at hot and high airports?
Departing in hot weather at high altitude airports reduces aircraft takeoff performance. When operating in these conditions, pilots must pay close attention to the environmental conditions as they can affect the flight in more ways than you might imagine. Aircraft fly not because of the engines, but because of the lift generated by the wings.
What to do when flying in high density altitude?
The idea is to go to full throttle, then lean the mixture as needed to reach the altitude-indicated fuel flow rate. This gives an approximation of whats needed for takeoff and climb power. The only way to positively obtain the most available power is to set mixture for maximum horsepower before takeoff.
What happens when you launch from a high density airport?
Launching from a high-DA airport with an obstacle you may need to sacrifice a little long-term cooling in favor of short-term engine performance. In other words, youll get better performance by leaning as necessary for target EGT/optimum fuel flow for the takeoff roll and initial climb.