AE102

Question 1

What is Equilibrium?

Answer 1

Absence of acceleration (linear or angular)

Question 2

When does equilibrium exist?

Answer 2

Sum of all forces + Sum of all moments around center of gravity = 0

Question 3

Describe equilibrium in straight and level flight

Answer 3

At constant velocity when thrust is equal to drag and lift is equal to weight

Question 4

Describe equilibrium not in straight and level flight

Answer 4

In a climb or descent, it occurs when lift equals the ‘perpendicular’ component of weight and thrust is equal to the sum of drag plus the ‘parallel’ component of weight

Question 5

What are the examples of accelerated flight conditions (2)?

Answer 5

Takeoffs and Turns

Question 6

What defines an accelerated flight condition as opposed to unaccelerated, level flight conditions?

Answer 6

Accelerated flight conditions occur when opposing forces are not balanced