Spins And Stalls Flashcards
Turn rate
Turn in degrees per second
Measured about the vertical axis
Varies with airspeed
●The norm is 3° per second
Turn radius
How big is my turn
Varies with speed or bank
●It can be both
Is affected by wind
Power on stall
Wings deeper into stall
●Propwash on wing, tail
Less lateral stability
One wing is usually stalled more than the other, causing a roll
Note: Power-on turning stall
●Roll will be opposite direction of bank
●Descending turn just the opposite
Secondary stall
Due to improper recovery procedures
Accelerated stall
Stall due to imposing high G-forces on the airfoils
At 4 G’s, stall speed doubles
Cross controlled stall
Improper Rudder and Aileron inputs
Elevator trim stall
Elevator trim tab is too far aft during high power settings or application
CG location
As the CG is moved aft, the amount of elevator deflection needed to stall the airplane at a given load factor will be reduced
●An increased AOA will be achieved with less elevator control force
Types of spins
Incipient
Fully Developed
●Spiral Mode Recovery
Flat
Four phases of a spin
Entry
Incipient Phase
Developed Phase
Recovery Phase
Configuration effects
Flaps
●Tend to flatten out spin, causes slower rotation (drag)
Landing Gear
●Little to no effect – best position is up though so you don’t exceed Vle on recovery
Power
●Will prolong recovery and cause a flatter spin for thrust lines below the CG
CG
●Aft could prevent recovery
●Aft increases recovery time because of a shorter rudder arm
Spin recovery
Power
Ailerons
Rudder
Elevator
