Chaper 12 Flashcards
What is VMD
When parasite drag exactly equals induced drag which is velocity at minimum drag.
What happens to the drag polar when flaps are increased?
The Curves move up and right
What happens to drag on a drag - IAS plot?
Drag is relegated to dynamic pressure (IAS) so on a drag -IAS plot, altitude has no effect on the position of the total drag curve.
On a TAS drag graph what happens to the total drag curve?
The drag curve shifts right with altitude because for the same IAS, TAS increases as air density decreases.
What is the best lift drag ratio for angle of attack?
A general purpose aerofoil is most efficient (best L/D ratio) at about 4° alpha.
On a Drag/TAS plot, the bottom of the total drag curve indicates?
VMD
On a Drag/IAS plot the bottom of the total drag curve indicates?
VIMD
