Other Key Points Flashcards
(4 cards)
1
Q
In the subsonic region air is said to have what property?
A
Constant density (treated as incompressible to simplify calculations)
2
Q
What do we get if we roatate a cylinder in an airflow?
A
A low pressure on one side as the spin assists the airflow, and a high pressure on the opposite side as the airflow is flowed down. This shows that lift is generated perpendicular to airflow.
3
Q
If we have low form drag, what type of friction drag occurs?
A
High skin friction
4
Q
What is introduced into the lift and drag equations to account for the differences between actual and theoretical figures?
A
Coefficient of lift and coefficient of drag.
