Lift / Drag Ratio Flashcards
1
Q
When an airfoil operates at the best lift/drag ratio, the angle between lift and total reaction is (zero / as small as possible).
A
- As Small as Possible.
2
Q
The total reaction (can / can not) act at right angle to the relative airflow.
A
- Can Not.
3
Q
If lift remains constant but drag is reduced, the lift/drag ratio (improves / gets worse) and the total reaction leans (closer to / further away from) lift.
A
- Improves.
- Closer to.
4
Q
An airfoil’s lift/drag ratio is principally determined by its ________________ & ________________.
A
- Shape.
- Angle of Attack.
5
Q
The best lift drag/ratio is normally found when an airfoil operates at a (large / small) angle of attack.
A
- Small.
6
Q
When operating at the best lift/drag ratio, lift production (is / is not) at it maximum but drag is at its (minimum / maximum).
A
- Is Not.
- Minimum.
