問題一覧
1
Passive stability
the inherent stability incorporated into an aeroplane by the aerodynamic features and the configuration of the aeroplane
2
The power provided by jet and piston engines alike decrease with altitude,
due mainly to decreasing air density
3
A minimum radius turn is easier achieved
at low altitude
4
In any manoeuvre, the stalling speed is
proportional to the square root of the load factor
5
During a turn
insufficient rudder causes slip
6
Winglets
reduce tip vortices, increasing the effective aspect ratio
7
The normal axis of an aircraft passes
through the center of gravity
8
The load factor of a given aircraft in a given condition of flight is defined as
the lift divided by the weight.
9
Rate of climb is dependent upon
excess power.
10
Ground effect results
in increased lift and reduced drag.
11
Flaps at landing position
decrease landing speed.
12
In the case of an aircraft making a turn, the force causing centripetal acceleration
is the horizontal component of the lift acting on the aircraft.
13
In straight and level flight
lift = weight, and thrust = drag.
14
The best gliding angle is achieved by using the angle of attack that gives
the best L/D ratio
15
Compared to straight and level flight, when an aeroplane is turning
stall speed increases and load factor increases.
16
If the aeroplane is loaded with the centre of gravity too far aft,
the aeroplane may assume a nose up rather than a nose down attitude.
17
When an aeroplane is in an unpowered descent, a component of the weight
acts forwards along the flight path, and provides the ‘thrust’ to drive the aeroplane forwards against the drag.
18
During a turn, for any given speed
the radius of turn will depend upon the angle of bank
19
When a turn is executed without any skid or slip, it
is called a coordinated turn
20
A winglet
reduces drag and increases thrust.
21
Fowler flap
increases the area of the wing.
22
Porpoising
If the aeroplane is loaded with the centre of gravity too far aft,
23
Directional stability is stability about
the normal axis
24
The glide ratio is the same as the
lift/drag ratio
25
An increase in altitude will cause the rate of turn
to decrease
26
To achieve a maximum rate turn, it can be shown that
Wing loading must be as low as possible.
27
A standard rate turn is defined as a 3° per second turn, which completes a 360° turn in 2 minutes.
This is known as a 2-minute turn or rate one (180°/min).