finals1

Question 1

wing plan form of a highspeed wing

Answer 1

swept, backwards,

Question 2

Example of a swept forward wing plan form aircraft

Answer 2

SU-47 berkut

Question 3

are the most aerodynamically efficient type of wing
because of the elliptical spanwise lift distribution it generates in flight.

Answer 3

elliptical wing

why?
because its spanwise lift distribution is ideal as it induces lowest possible drag

Question 4

are constant chord wings which are easiest to manufacture

Answer 4

rectangular wing

Question 5

were designed to modify the rectangular wing planform where the chord essentially varies along the span of the wing to generate an elliptical spanwise lift distribution.

Answer 5

tapered

Question 6

Are low aspect ratio wings that are used in all flight regimes. This type of wings s generally efficient for high speeds and exhibits high drag at low speeds

Answer 6

Delta wings

Question 7

reduces the aerodynamic drag as the aircraft fly at high speed subsonic or transonic speeds.

Answer 7

swept back wings or swept wings

Question 7

an example of a delta wing is a ____ employed in a supersonic concorde

Answer 7

ogive

Question 8

explain how swept back wings works

Answer 8

sweeping the wings backwards can reduce the effective airspeed seen by the airfoil which delays the onset of drag brought about by fluid

Question 9

controls pitch about the lateral axis. Unlike the
ailerons, the elevators function to turn the nose of the aircraft up or
down. This is achieved by deflecting the elevators upward or
downward respectively.

Answer 9

elevators

Question 10

The elevators are controlled by

Answer 10

pulling or pushing the control wheel
in a forward or backward direction. if deflected downward, pitch up

Question 11

Elevators employed for the________is away from the
effects of downwash from the propeller and airflow around the
wing during normal flight conditions. The consequence of this
design is that it allows control movements that are consistent
throughout most of the flight regimes.

Answer 11

T-Tail Design

Question 12

is a movable horizontal surface that acts as an
elevator. It functions just like an elevator

Answer 12

Stabilator

Question 13

acts as a control surface near the nose of the aircraft
designed to create lift to pitch the nose up. On the other hand,
aft-tail designs produce a downward force to prevent the nose of
the aircraft from rotating downward.

Answer 13

canard

Question 14

The control movement about the vertical axis is controlled by the

Answer 14

rudder

Question 15

controls the aircraft about the longitudinal axis.

Answer 15

Ailerons

Question 16

are operated in such a way that one aileron is
deflected at a larger angle corresponding to the control wheel input.
This is usually done on the aileron deflected upwards where drag
values are small to compensate for the difference in drag produced
by the aileron deflected downwards.

Answer 16

differential ailerons

Question 17

are operated by pivoting on an offset hinge. As
the aileron is deflected upward, its leading edge is exposed to the
airflow on the bottom surface to create drag. This drag is
contributing to the total drag produced by the upward deflected
aileron and helps equalize the drag created by the downward
deflected aileron on the opposite wing which reduces the effects of
adverse yaw.

Answer 17

frise type aileron

Question 18

Mitigating the effects of adverse yaw may also be done using the
____ It operates by automatic rudder
deflection for every control input done on the control wheel.

Answer 18

coupled ailerons and rudder

Question 19

are control surfaces that combine the aspects of ailerons
and flaps.

Answer 19

Flaperons

Question 20

For
most conventional low speed aircrafts, the value of lift coefficient is about

Answer 20

1.3 or 1.4

Question 21

is small auxiliary airfoil located near the rear of a
main airfoil which can be deflected about a given line where it is
hinged.

Answer 21

Trailing edge flap

Question 22

It is the simplest and earliest type of high lift device.

Answer 22

plain flap

Question 23

only the bottom part of the airfoil is movable which
leaves the upper geometry of the airfoil unchanged during flap
deflections.

Answer 23

split flap

Question 24

opens a gap or slot between the flap and the main airfoil when it is deflected.

Answer 24

slotted flaps

Question 25

a flap that has employs a special mechanism such that when it is deployed, not only it deflects downward but also translates or tracks to the trailing edge of the wing.

Answer 25

fowler flaps

Question 26

directs airflow in the upper surface of the wing which in turn delays airflow separation at higher angles of attack.

Answer 26

fixed slots

Question 27

designed as a small, highly cambered section located slightly forward in the leading edge of the wing. In principle, it functions as a flap when deflected at the leading edge but it forms an unsealed gap (slot) between the flap and the leading edge.

Answer 27

leading edge slat

Question 28

___________ is the same as the trailing edge flap with the exception that it is installed in the leading edge of the wing. This type of flap pivots downward which in turn increases the effective camber. One working feature employed by this type of flap is that, the gap between the flap and the leading edge is sealed. This results in the translation of the zero lift angle of attack to a higher value, however, since the effective chord of this flap is smaller than the trailing edge, it contributes a lower increment in lift coefficient.

Answer 28

leading edge flap

Question 29

Many high speed airfoil sections have fairly sharp leading edges and very little camber which tends to stall early even at moderate angles of attack. This is because of the flow around the leading edge which have to negotiate a sharp bend. This gives rise to a region of separated flow, known as

Answer 29

Separation bubble

Question 30

_____Are used to increase the maximum lift coefficient and the camber of the wings. However, ________are fixed aerodynamic devices where in most cases it extends down and forward the leading edge of the wing.

Answer 30

leading edge cuff

Question 31

it is made of a thinner profile and lies flush with the bottom surface of the wing when not deflected. Therefore, it is suitable for thing wing sections.

Answer 31

Krueger flap

Question 32

a narrow slit is used to blow high speed air in the upper surface of the airfoil.

Answer 32

boundary layer blowing

Question 33

works in a principle of suction which removes slowly moving air in the boundary layer. Small holes are flushed in the surface of a wing upstream of the separation point where the air in the boundary layer is sucked into the wing.

Answer 33

boundary layer suction

Question 34

consists of a very high speed jet of air blown through a narrow slit in the trailing edge of the wing. The jet which is deflected slightly downwards, divides the upper and lower surface flow which produces an effect on the flow over the wing just like what would be produced by a very large physical trailing edge

Answer 34

jet flap