Performance and Limitations

Question 1

How is aircraft performance significantly affected as air becomes less dense ?

Answer 1

As air becomes less dense, it reduces

a. power because the engine takes in less air.
b. thrust because the propeller is less efficient in thin air.
c. lift because thin air exerts less force on airfoils.

Question 2

What is the standard atmosphere at sea level?

Answer 2

29.92

Question 3

What are standard atmosphere temperature and pressure lapse rates?

Answer 3

3.5°F or 2°C per 1,000 feet up to 36,000 feet. Constant to 80,000.

Question 4

Define the term “pressure altitude.”

Answer 4

Height above standard datum plane.. 29.92

Question 5

Why is pressure altitude important?

Answer 5

1. basis for determining performance.

2. ) assigning flight levels about 18,000