Level Flight And Climb

Question 1

In unaccelerated flight….

Answer 1

L=W
T=D

Lift = weight
Thrust = drag

Question 2

Total reaction is..

Answer 2

Lift perpendicular to free stream flow and drag which is parallel to free stream flow

Question 3

Direction of thrust component on jet aircraft

Answer 3

Acting through the centreline of the jet engine opposing the RAF

Question 4

Lift in level flight is the sum of

Answer 4

Weight and the downforce of the tailplane

Question 5

Advantage of underslung engines

Answer 5

Produce a nose up pitching moment to counteract the lift weight couple reducing the drag from tailplane

Question 6

Best angle of climb Vx

Answer 6

Gives steepest climb angle - climbing to clear nearby objects

Question 7

Best rate of climb Vy

Answer 7

Climb to altitude as quickly as possible

Question 8

Thrust to drag couple

Answer 8

Counters pitch down moment
Reduces trim drag from pitch down moment from forward CG

Question 9

Lift to weight couple

Answer 9

Pitches nose down
Need to be balance by downforces on tailplane
Increase component of lift to overcome L/W

Question 10

Trim drag

Answer 10

Induced drag from downforces from tailplane to counter L/W couple

Question 11

Flight path angle

Answer 11

Gamma y
Angle between the path of aircraft through the air and local horizontal

Question 12

Pitch angle

Answer 12

The angle between aircraft longitudinal axis and the horizontal
The angle shown on attitude indicators

AOA + flight path angle

Question 13

Climb Angle

Answer 13

Angle between aircraft’s path in the air and the horizontal

Question 14

Forces perpendicular to the flight path equation

Answer 14

L = Weight x cos(y)

Question 15

Forces Parallel to flight path formula

Answer 15

Sin(Y) = Thrust - Drag / Weight

Question 16

Effect of altitude of climb angle

Answer 16

Constant IAS and AOA the angle of climb reduces due to reduction in thrust

Question 17

Lift Equation in steady climb

Answer 17

Weight x Cos (Gamma) = Lift