Aerodynamics 1 Flashcards
Load factor is the lift divided by the ________ of the aircraft
divided by the total weight of the aircraft
For a given angle of bank, in any airplane, the load factor imposed in a coordinated constant altitude turn is ________ and the stall speed __________
is constant and the stall speed increases.
what is the difference on the load factor for Boeing 737 vs Piper
Load factor of 2 is the same
Why during the constant turn, stall speed increases?
not lose altitude, the pilot must increase the wing’s angle of attack
Most general
aviation airplanes are designed for a load limit of _____Gs.
3.8
Maximum turning performance is
accomplished when an airplane has both a ______ rate of turn and _______ radius of tum,
fast rate of tum and minimum radius of tum,
rate of tum and minimum radius of turn are affected by
Airspeed and Angle of Bank
What determines the Max bank angle
The airplane’s limiting load factor determines the maximum bank angle
In a rapid recovery from a dive, the effects of load factor would cause the stall speed to_______
Increase
Any aircraft, within the limits of its structure, may be stalled at any _______
airspeed.
aircraft’s stalling speed increases in proportion to the square root of the load
factor. What do you need to know?
- The danger of inadvertently stalling the aircraft by increasing the load factor, as in a steep tum or spiral;
- When intentionally stalling an aircraft above its design maneuvering speed, a tremendous load factor is imposed.
Stalling Speed is 50
Load Factor is 4
Stalling speed is______
100
While maintaining a constant angle of bank and altitude an coordinated tum, an Increase in
airspeed will ________ the rate of turn resulting in _______ in load factor.
decrease the rate of turn resulting in no change in load factor.
What is rate of turn?
the number of degrees ( expressed in degrees per second) of heading change that an aircraft makes.
If the airspeed is increased and the ROT desired is to be constant, the angle of bank must be ________, otherwise, the ROT ________
increased, otherwise, the ROT decreases
You are making a level turn at a constant bank angle. If you vary the rate of turn, the load
factor will
remain constant.
The need to slow an aircraft below VA is brought about by the following weather phenomenon:
Turbulence which causes an increase in stall speed.
There are two types of load factors factored into aircraft design:
limit load and ultimate load.
What is the limit load?
causes a bending of the aircraft structure that does not return to the original shape.
What is ultimate load?
the limit load and at which point the aircraft material experiences structural failure (breakage).
Speeds up to, but not exceeding, the maneuvering speed allow an aircraft to ________ prior to experiencing an increase in
load factor that would exceed the limit load of the aircraft.
stall
In theory, if the airspeed of an airplane is doubled while in level flight, parasite drag will become
four times greater
What happens if AOA of a symmetrical airfoil were zero?
no pressure differential, and consequently, no downwash
component and no induced drag
the lower the airspeed, the _______the AOA required to produce _____ equal to the aircraft’s ______ and, therefore, the greater ________ drag.
greater the AOA required to produce lift equal to the aircraft’s weight and, therefore, the greater induced drag.
If the airspeed is increased from 90 knots to 135 knots during a level 60 “banked turn , the load
factor will
Remain same but radius of the turn will increase
At a constant altitude, during a coordinated tum in any aircraft, the load factor is the result of two forces:
1) centrifugal force
2) weight.
When Centrifugal force and weight are affecting the load factor, how come load factor is same on a given bank angle?
the higher the speed, the
slower the ROT. This compensates for added centrifugal force, allowing the load factor to remain the same.
Explain the Glide Speed
1) maximize the distance flown in an emergency
2) Airplane travels the greatest forward distance for a given loss of altitude in still air.
3) This best glide airspeed occurs at the highest lift-to-drag ratio (LID).
Power-on stalls occur at lower airspeeds in _______ banks
Power-on stalls occur at lower airspeeds in shallower banks
Raising the flaps will result in an ________ in stall speed, whether turning or not.
Raising the flaps will result in an increase in stall speed, again, whether turning or not.
Flap extension during landings provides several advantages by:
- Producing greater lift and lower landing speed,
- Producing greater drag, a steeper descent angle without airspeed increase, and
- Reducing the length of the landing roll.
Name the four fundamentals involved in maneuvering an aircraft.
Straight and level flight, turns , climbs , and descents
Stall speed is affected by
weight, load factor, and power.
A rectangular wing, as compared to other wing planforms, has a tendency to stall first at the
wing root, with the stall progression toward the wing tip.
Thrust is the force against force of _____
drag
Thrust is parellel to ____________
longitudinal axis
Drag acts parallel to _________
relative wind/flight path
Lift act perpendicular to________
lateral axis
Weight acts vertically ________
downward
The angle of attach which the plane stall remains same regardless of
1) weight
2) Dynamic Pressure
3) Bank angle
4) Pitch Attitude
