Flight Mechanics

Question 1

what pitch does lift/ weight couple create?

Answer 1

nose down pitch

Question 2

what pitch does thrust / drag couple create?

Answer 2

nose pitch up

Question 3

what is the flight path angle between?

Answer 3

the flight path, or speed vector and the horizontal

Question 4

what is angle of incidence?

Answer 4

angle between wing chord and the longitudinal axis

Question 5

pitch angle is?

Answer 5

the angle between the longitdinal axis and the horizontal

Question 6

thrust required equation?

Answer 6

T = D + W sin(climb angle)

Question 7

Lift in a climb equation

Answer 7

L = W cos y

Question 8

in a steady climb which is greater lift or weight?

Answer 8

in a steady climb lift is greater than weight

Question 9

climb gradient equation with L/D ratio

Answer 9

T/W - 1 / (LD ratio)

Question 10

when does best glide range occur?

Answer 10

it occurs at maximum glide angle or VMD or maximum lift to drag ratio.

Question 11

where is glide angle measured from?

Answer 11

the horizontal and is measured downwards.

Question 12

what happens to glide angle and ROD with an increase in speed?

Answer 12

ROD will increase and Glide angle will also increase.

Question 13

what happens to glide angle with tailwind?

Answer 13

glide angle decreases

Question 14

what happens to glide angle with headwind?

Answer 14

glide angle increases

Question 15

what happens to glide distance when flaps are extended and why?

Answer 15

when flaps are extended the lift to drag ratio decreases due to sharp increase in drag. as a result, the nose will fall and the glide angle will increase

Question 16

radius of a turn =

Answer 16

v^2/ g tan x

Question 17

define a slipping turn to the right.

Answer 17

the aircrafts nose is pointed outwards (left) .

the indicator would b on the far right as there is too much bank.

Question 18

define a skidding turn to the right.

Answer 18

think more of a drift, nose is pointed to far into the turn.

will occur when there is too much yaw

Question 19

rate of turn equation?

Answer 19

= G tan X / V

Question 20

what happens to rudder control input when a critical engine fails?

Answer 20

= this must be increased to produce the same effect.

Question 21

how is critical engine determined in a clockwise rotating propeller twin?

Answer 21

the centre of thrust for each engine is slightly offset to the right of each engine, this means that one moment force is slightly bigger than the other and therefore is considered more critical.

Question 22

define asymmetric blade effect? p factor

Answer 22

at pitched attitude, one part of the propeller will have a higher angle of attack than the other, creating more lift which is translated into a yaw reaction.

Question 23

what is VMCA and how is it determined?

Answer 23

minimum control speed of a/c in air in takeoff configuration.

determined by within 20 degrees heading change, no more 5 degree bank

Question 24

define vmcl?

Answer 24

minimum control in landing configuration

maintains control within the landing configuration.