Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

Question 1

In order to improve the stall characteristics of an aircraft, the wing is twisted outwards (the angle of incidence varies spanwise). This is known as...

Accepted Answer

Geometric washout

Answer

Arrow shape

Answer

V-form

Answer

Aerodynamic washout

Question 2

Which statement regarding a spin is correct?

Accepted Answer

During recovery the ailerons should be kept neutral

Answer

During the spin the speed constantly increases

Answer

During recovery the ailerons should be crossed

Answer

Only very old aeroplanes have a risk of spinning

Question 3

Which statement describes a situation of static stability?

Accepted Answer

An aircraft distorted by external impact will return to the original position

Answer

An aircraft distorted by external impact will tend to an even more deflected position

Answer

An aircraft distorted by external impact will maintain the deflected position

Answer

An aircraft distorted by external impact can return to its original position by rudder input

Question 4

Which statement about the airflow around an aerofoil is correct if the angle of attack increases?

Accepted Answer

The stagnation point moves down

Answer

The centre of pressure moves down

Answer

The centre of pressure moves up

Answer

The stagnation point moves up

Question 5

Which option states a benefit of wing washout?

Accepted Answer

At high angles of attack the effectiveness of the aileron is retained as long as possible

Answer

With the washout the form drag reduces at high speeds

Answer

Greater hardness because the wing can withstand more torsion forces

Answer

Structurally the wing is made more rigid against rotation

Question 6

What has to be considered when operating a sailplane with water ballast?

Accepted Answer

It should stay below freezing level

Answer

Best glide angle decreases

Answer

Significant CG shifts

Answer

Best glide speed decreases

Question 7

Which design feature can compensate for adverse yaw?

Accepted Answer

Differential aileron deflection

Answer

Wing dihedral

Answer

Full deflection of the aileron

Answer

Aileron trim

Question 8

What has to be considered with regard to the centre of gravity position?

Accepted Answer

Only correct loading can assure a correct and safe centre of gravity position

Answer

By moving the elevator trim tab, the centre of gravity can be shifted into a correct position

Answer

The centre of gravity's position can only be determined during flight

Answer

By moving the aileron trim tab, the centre of gravity can be shifted into a correct position

Question 9

How does a laminar boundary layer differ from a turbulent boundary layer?

Accepted Answer

The turbulent boundary layer can follow the airfoil camber at higher angles of attack

Answer

The laminar boundary layer is thinner and provides more skin-friction drag

Answer

The laminar boundary layer produces lift, the turbulent boundary layer produces drag

Answer

The turbulent boundary layer is thicker and provides less skin-friction drag

Question 10

Which point on the aerofoil is represented by number 4? See figure (PFA-009)

Accepted Answer

Separation point

Answer

Transition point

Answer

Stagnation point

Answer

Centre of pressure

Exam questions Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

SPL - Sailplane Pilot License: Principles of Flight (Aeroplane) 10 Questions no time limit

Exam questions Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

SPL - Sailplane Pilot License: Principles of Flight (Aeroplane) 10 Questions no time limit

You have reached the free limit

Upgrading to PRO gives you access to: