Forces of Flight
What are the four forces of flight?
Lift, drag, weight, and thrust
Define "stall"
Spinning occurs around which axis?
Yaw
Define AOA
Angle between chord line and relative wind
When are the four forces of flight in equilibrium?
During level, unaccelerated flight.
At how many G's does a normal stall occur?
1G
Which wing is more stalled in a spinning plane?
The lower wing.
What is the AOA during descent? (Positive, neutral, or negative)
Negative
What is an aircraft doing if its lift exceeds its weight?
Climbing
This type of stall occurs at more than 1G
Accelerated stall
What is the first step to recover from a spin?
Reduce power
Define Critical AOA
The point at which increasing the AOA reduces lift
Explain an airplane speeding up in terms of the four forces
Thrust exceeds drag
How does a pilot know their plane is stalling?
AOA indicator, low airspeed, stall warning horn, quieter airflow, warning devices
When do spins happen?
When the aircraft stalls while uncoordinated
At 0o AOA, a symmetrical airfoil has how much lift?
Zero
How can a pilot increase lift?
Extend flaps, increase speed, increase AOA
Name one method of recovering a stall
Reduce AOA, increase throttle, use rudder to coordinate motion, raise flaps and landing gear
What are the four steps to spin recovery? ("PARE")
1. Power down
2. Ailerons neutral
3. Rudder opposite
4. Elevator down
What direction(s) is the force of Thrust during a positive AOA?
Forward and upward