Fundamental Forces and Aircraft Functions

The video tutorial from Flight Insight Test Prep covers essential aerodynamics concepts for private pilot knowledge test preparation. It begins with an introduction to the course, followed by a detailed explanation of the four forces acting on an aircraft: lift, weight, thrust, and drag. The tutorial discusses equilibrium in flight, the role of cambered wings and Bernoulli's principle in lift production, and the significance of the angle of attack. It also covers the conditions leading to stalls and spins, and the function of flaps in managing lift and drag during flight.

What are the four fundamental forces acting on an aircraft during flight?

• Lift, Gravity, Speed, Friction

• Lift, Thrust, Speed, Friction

• Lift, Weight, Thrust, Drag

• Thrust, Gravity, Pressure, Drag

When an aircraft's lift is equal to its weight, what is the aircraft's state?

• It is in straight and level unaccelerated flight

• It is descending

• It is climbing

• It is accelerating

According to Bernoulli's principle, what happens to air pressure as it moves faster over the top of a wing?

• The pressure fluctuates

• The pressure increases

• The pressure decreases

• The pressure remains the same

What is the angle between the chord line of an airfoil and the relative wind called?

• Pitch Angle

• Angle of Attack

• Yaw Angle

• Angle of Incidence

What happens when the angle of attack is increased too much?

• The wing stalls

• The aircraft accelerates

• The wing produces more lift

• The aircraft climbs

What condition must be met for a spin to occur?

• The aircraft is in a steep descent

• Both wings are stalled

• The aircraft is in a steep climb

• Only one wing is stalled

What happens to the lift when the angle of attack is increased equally on both wings?

• Lift fluctuates

• Lift remains the same

• Lift increases

• Lift decreases

What is the primary function of flaps on an aircraft?

• To increase speed

• To stabilize the aircraft

• To decrease drag

• To increase lift at lower speeds

How do flaps affect the angle of attack?

• They allow the same lift at a lower angle of attack

• They decrease the angle of attack

• They have no effect on the angle of attack

• They increase the angle of attack

What is one of the purposes of adding drag with flaps during landing?

• To decrease weight

• To reduce lift

• To make steeper approaches

• To increase airspeed