Forces Acting On Aeroplane

Question 1

Increase in parasite drag does what to the total drag curve

Answer 1

Total drag curve moves up and left

Question 2

Increased Induced Drag on total drag curve

Answer 2

Moves up and right

Question 3

Total drag curve

Answer 3

Result of the average of parasite drag and induced drag curve - VMD is marked at the bottom of this

Question 4

Increase in mass on Vmd

Answer 4

Increase induced drag - moves graph up and right
Curve move right also increase in VMD speed

Question 5

Induced Drag

Answer 5

Results from creating lift
- Highest at low speed high AOA largest CL
- Varies with Q/S/CDI

                                        1 Induced Drag =          ————
                                      IAS2

Question 6

CDI

Answer 6

CDI = CL2
——————
3.142 X AR

Half the speed CDI is 16x larger

Question 7

Fuel burn causes the total drag curve to

Answer 7

Move down and left as mass decreases

Question 8

Flight Progression Rules of thumb for mass/VMD

Answer 8

10% reduction in mass = VMD 5% slower
20% reduction in mass = VMD 10% showers

Question 9

Dirty Config

Answer 9

More drag at all speeds
VMD is slower (Parasite drag)

Question 10

Lift Formula

Answer 10

Lift = 1/2 x p x s x cl x V2

Density = P
Surface area = S
Coefficient of lift = CL