What are wing tip vortices?
What are wing tip vortices?
Wingtip vortices are tubes of circulating air that are left behind a wing as it generates lift.
They are caused by the difference in pressure above and below the wing causing the air to 'escape' from the high pressure area below the wing to the low pressure area above the wing, by rolling around the tip of the wing. This creates a vortex that trails behind the wing.
What produces the maximum glide range?
What produces the maximum glide range?
Flying at Vmd. At this speed the aircraft is flying at the maximum ratio of Lift and Drag, maximizing the potential energy consumption in terms of distance travelled.
What is a high bypass ratio engine?
What is a high bypass ratio engine?
In a high bypass design, the vast majority of the thrust is derived from the ducted fan, rather than from combustion gases expanding in a nozzle.
A high bypass ratio provides a lower thrust specific fuel consumption (grams/sec fuel per unit of thrust in kN using SI units), especially at zero velocity (at takeoff) and at the cruise speed of most commercial jet aircraft.
Does the N1 compressor produce thrust?
Does the N1 compressor produce thrust?
Yes, with the modern high bypass turbofans the N1 compressor works as a huge propeller, it takes a big mass of air and gives it a relative small acceleration.
Around 70% of the air will bypass the core of the engine, only 30% of air will be compressed further and will eventually go through the combustion chamber.
On a tapered wing, where would the stall occur first?
On a tapered wing, where would the stall occur first?
At the tip as downwash and spanwise flow effect the angle of attack at each section, but because of the tapered wing the effective angle of attack near the tips is greater than that near the center.
What is a yaw damper?
What is a yaw damper?
Boots on the leading edges inflate (6 seconds) to break the ice dissipating it into the airflow.
Powered by the gyro pressure system.
What effect does a wet runway have on V1?
What effect does a wet runway have on V1?
V1 is lower when the runway is wet than when the runway is dry, because of the longer ASDR on a wet runway.
Which flight will take the shortest time, from London to New York or New York to London?
Which flight will take the shortest time, from London to New York or New York to London?
New York to London (flying east) would take less time because of the Polar front westerly jet stream.
What is departure?
What is departure?
Departure is an east-west distance along a parallel line of latitude, other than the equator.
Departure is calculated by: Change of longitude(minutes) x cosine of latitude.
Why is anhedral used instead on some aircraft?
Why is anhedral used instead on some aircraft?
Anhedral:
compensates for the wing sweep improves roll maneuverability