Critical engine

Question 1

What is a critical engine

Answer 1

the engine if lost will most adversely affect performance and handling

Question 2

What are the 4 factors that determine a critical engine?

Answer 2

P Factor- the descending propeller blade is producing more thrust than the ascending. If the left engine fails, p factor from the right engine is further from the CG, producing a greater effect. This creates a YAW moment

Question 3

What are the 4 factors that determine a critical engine?

Answer 3

Accelerated slipstream- Air being forced over the wing by the operating engine creates extra lift. Basically the opposite effect of p factor. The descending blade is creating more thrust, and the right engine is further from cg. This creates a ROLL moment

Question 3

What are the 4 factors that determine a critical engine?

Answer 3

Spiraling slipstream- The effect of the propeller being pulled through the air while rotating creates a spiraling stream of air behind the propeller. The spiraling air from the left prop, hits the rudder making it more effective. This creates a YAW moment

Question 4

What are the 4 factors that determine a critical engine?

Answer 4

Torque- The opposite reaction to the action of turning the propeller. Torque tries to roll the airplane opposite of the propellers direction of rotation. If the left engine fails, torque tries to roll the aircraft to the left, making it more difficult to raise the dead engine. This creates a ROLL moment