30 Questions
Which force is the propelling force delivered by the aircraft's powerplant?
Thrust
Which force is produced mainly by the aircraft's wings and acts at right angles to the line of flight?
Lift
Which force acts vertically downwards through the aircraft's center of gravity?
Weight
Which force opposes the forward motion of the aircraft?
Drag
Which arrangement of the four forces tends to force the aircraft's nose down?
Lift and weight forces acting together
In steady state level flight, if an aircraft is flying at a constant height and speed, which equation represents the relationship between lift, weight, thrust, and drag?
Lift = Weight and Thrust = Drag
Which forces must be equal in order for an aircraft to maintain level flight?
Thrust and drag
What happens to an aircraft's speed if the thrust force disappears due to engine failure?
It maintains enough speed to prevent stalling
What is the purpose of a tailplane on an aircraft?
To counter out-of-balance pitching moments
What happens to an aircraft's nose when the thrust/drag couple is removed during engine failure?
It drops
What is the consequence of the downward force produced by the tailplane?
An increase in aircraft weight
Which factor affects the gliding range of an aircraft the most?
The prevailing wind
What is the primary purpose of the tailplane in an aircraft?
To balance the aircraft at high speed
What is the condition called when the lift force equals the weight force and the thrust force equals the drag force?
Trimmed
What happens to the Centre Of Pressure (CoP) of an aircraft's mainplane at low speed?
It moves forward
What happens to the Centre Of Pressure (CoP) of an aircraft's mainplane at high speed?
It moves rearwards
What is the relationship between the weight of an aircraft and the lift required during a climb?
The lift required is less than straight and level flight
What are the two means by which an aircraft gains potential energy during a climb?
Increasing thrust and a loss of airspeed without increasing power
Which force is responsible for keeping the aircraft in the air?
Lift
What is the equation for lift force?
$Lift = Weight \cdot \cos(\theta)$
What is the equation for drag force?
$Drag = Weight \cdot \sin(\theta)$
What is the purpose of the rudder during a right turn?
To prevent the nose from moving to the left
What happens to the lift force in a turn?
It increases
Which statement accurately describes load factor in straight and level flight?
The load factor is equal to 1.
What is the effect of increasing the angle of bank in a turn?
The load supported by the wings increases.
What force is required to overcome the inertia when an aircraft changes its flight path to a curved path?
Centripetal force
What is the relationship between increasing lift and load in an aircraft?
Increasing lift increases the positive load on the wings.
What happens to the load factor during a stall?
The load factor may be reduced to zero.
What happens to the load factor if there is an excessive deviation from positive or negative load factor limits?
The structural load limits of the aeroplane may be exceeded.
What’s the formula for load factor ?
Load factor = Lift / Weight
This quiz tests your knowledge on the effects of high and low speeds on the angle of attack and Centre of Pressure (CoP) of an aircraft. Learn how these factors can cause the nose to drop or rise, and explore ways to counteract these tendencies.
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