POF revisits

Question 1

Assume that after t/o a turn is made to a downwind hdg. In regard to the grd, the aeroplane will climb at

Answer 1

STEEPER ANGLE into the wind than downwind

Question 2

When AOA of symmetrical aerofoil is inc, the CP ( centre of px) will ___

Answer 2

Remain unaffected

Question 3

An aircraft has a L/D ratio is 15:1 at 50 kts in calm air. What would be the L/D ratio with a direct headwind of 25kts

Answer 3

15:1
Inc or Dec in wt has no effect in L/D ratio

Question 4

The best L/D ratio of an a/c in a given configuration is a value that ____

Answer 4

Remains constant regardless of IAS changes

Question 5

Wing w a higher aspect ratio will have ____ than a lower aspect ratio

Answer 5

Lower stall speed

Question 6

What happens to tot drag when accelerating from CLmax to max speed

Answer 6

Total drag Dec then inc

Question 7

If the aircraft weight is increased without change of C of G position, the stalling angle of attack will

Answer 7

Remain the same

Question 8

For an aircraft if steady turn stall speed and angle of attack would be

Answer 8

Higher stall speed but same AOA

Question 9

Sweep back on wing will inc tendency of ___

Answer 9

Tip stalling

Question 10

Highly tapered wing without wing twist the stall will commence at ___

Answer 10

At the tip

Question 11

Purpose of bdry layer fence on a swept back wing is to ___

Answer 11

To control spanwise flow and delay tip stall

Question 12

Slots inc the stalling angle of attack by

Answer 12

Delaying separation

Question 13

On an untapered wing without twist the downwash inc from ____

Answer 13

Inc from root to tip

Question 14

Vortex generators are used to

Answer 14

Reduce boundary layer sep

Question 15

Wing mounted stall warning detector came would be situated ____

Answer 15

At LE
On lower sfc

Question 16

Input date to a stalk warning device system is

Answer 16

Angle of attack
And is some systems rate of change of angle of attack

Question 17

In a developed spin the angle of attack of wings ___

Answer 17

angle of attack of both the wings will be positive

Question 18

Indications of icing induced stall can be

Answer 18

Violent roll oscillations
Airframe buffet
Violent wing drop
Extremely high rate of descents while in a normal flt attitude

Question 19

If a single engine prop a/c is stalled power on in a climb turn to left
What should be the recovery action

Answer 19

Elevator stick fwd
Ailerons stick neutral
Rudder to prevent wing drop

Question 20

Purpose of centrifugal latch on a single acting prop ____

Answer 20

Is to prevent feathering (fully course pitch from fully fine pitch) on shut down
(Overnight)

Question 21

If the wing AC is forward of the CG

Answer 21

changes in lift produce a wing pitching moment which acts to increase the change of lift

Question 22

If a disturbing force causes the aircraft to roll

Answer 22

wing dihedral will cause a rolling moment which reduces the sideslip

Question 23

Dihedral gives a stabilising rolling moment by causing an increase in lift

Answer 23

on the lower wing if the aircraft is sideslipping

Question 24

Sweepback of the wings will:

Answer 24

increases lateral stability at all speeds

Question 25

Dihedral angle is

Answer 25

the upward and outward inclination of the main places to the horizontal datum

Question 26

Aileron reversal would be most likely to occur:

Answer 26

flexible wing and
high airspeeds

Question 27

if ailerons are def to 10deg instead of 5 deg it will cause

Answer 27

inc in rate of roll

Question 28

What should be the feel on a ‘full and free’ check of the controls

Answer 28

a solid stop

Question 29

If an aileron is moved downward
the stalling angle of that wing

Answer 29

the stalling angle of that wing is DECREASED

Question 29

An aircraft takes off with the elevator control locks still in position. It is found to be nose heavy:

Answer 29

backward movement of the trim wheel would increase nose heaviness

Question 30

To achieve the same degree of longitudinal trim, the trim drag from a variable incidence trimming tailplane would be:

Answer 30

less than that from an elevator

variable incidence trimming tailpane is better than nnormal trim tabs

Question 31

The structure will continue to distort until it breaks
What is it called ?

Answer 31

Divergence

Question 32

What is a Flutter

Answer 32

The rapid and uncontrolled oscillation of a surface resulting from imbalance.

Flutter normally leads to a catastrophic failure of the structure

Question 33

Backlash

Answer 33

Possibility of movement of control sfc without any pilot’s input

Question 34

What is the purpose of fitting the engine to an aircraft using wing mounted pylons

Answer 34

The wing structure can be lighter because the engine acts as a mass balance and also relieves wing bending stress

Question 35

Aileron reversals at high dy pressures is caused by __

Answer 35

Dynamic pressure acting on aileron ,twisting the wing in the opposite direction, possibly causing the aircraft to bank in a direction opposite to that intended