What Happens? Flashcards
For an aircraft to move forward, _________
thrust must be greater than drag
When thrust is equal to drag, _________
the aircraft maintains a constant speed during the flight
How does an airplane generate lift?
An airplane generates lift because the leading edge deflects some of the relative wind downward, and the air goes running below the airfoil, creating an upward force that generates lift. The air that goes above the wing flows faster, which means it exerts less pressure than the air flowing below it. This is because faster moving air molecules are less dense and therefore have less pressure than slow-moving air molecules, which are more dense and exert more pressure. This is why the airplane generates lift.
What happens as the AOA increases?
As the AOA increases, an increase in airspeed differential happens, which increases lift but also increases drag.
Any item aboard an aircraft that increases the total weight is _______
undesirable for performance
Manufacturers attempt to make an aircraft as light as possible without what?
Sacrificing strength or safety
The pilot should always be aware of the consequences of what regarding loading?
Overloading. An overloaded aircraft may not be able to leave the ground, or if it does become airborne, it may exhibit unexpected and unusually poor flight characteristics. If not properly loaded, the initial indication of poor performance usually takes place during takeoff
What happens when air molecules hit or get close to the leading edge of the wing?
Some molecules go over and some under the wing, but the laws of physics tell us that they must meet in the end of the trailing edge, and to do this the molecule flowing over needs to move faster than the one under because there is more camber up there so it has to travel a longer distance. This is what causes lift.
The closer air molecules are to the wing inside the boundary layer_______. As Molecules move away from the wing, outside of the boundary layer, _______
the more they stick and cause friction, which makes them move slower
they start to move faster until they reach the upstream flow.
When lift is greater than weight, _______
the aircraft will achieve flight and will gain vertical speed.
If lift is equal to weight, _______
the aircraft will maintain a constant altitude
What can occur if an aircraft is overloaded?
The aircraft might not even lift off the ground, or if it does, the ground effect might create the illusion that it’s lifting, but once out of it, it might crash. If on cruise flight, then the aircraft will perform worse and it would save less fuel. It can decrease safety.
