I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 214
FOR SIMULATION USE ONLY – NOT A TRAINING AID
Progressive Spins
A progressive spin is a result of misapplication of recovery controls. Reversing the
rudder direction during a steady state spin while maintaining full aft stick will result
in a spin in the opposite direction.
Progressive spins are characterized by a noticeable nose-down pitch attitude
increase after rudder is reversed. The aircraft will continue to rotate in the original
spin direction for approximately one and one-half to two additional turns,
depending on initial spin direction and centre of gravity location. The airspeed will
increase up to 175 KIAS during the reversal.
Continuing to hold full aft stick and opposite rudder will result in a steady-state
spin in the opposite direction from the original spin manoeuvre. If a progressive
spin is inadvertently encountered, the published departure/OCF procedure provides
the best means of recovery.
Aggravated Spins
Entry into an aggravated spin is a result of misapplication of recovery controls.
An aggravated spin is caused by maintaining pro-spin rudder while moving the
control stick forward of the neutral position. As the control stick is moved forward
of neutral, an immediate increase in nose-down pitch occurs and the roll rate
increases significantly.
While still slightly oscillatory, the pitch attitude will decrease to approximately 70°
nose down and the roll rate will increase to as much as 280° per second.
Disorientation may be induced by the aggravated manoeuvre. If an aggravated spin
is inadvertently encountered, the published departure/OCF procedure provides the
best means of recovery.
CAUTION
Do not perform aggravated spins past two turns with aggravated flight
control inputs.
Sustained aggravated spins (in excess of 2 turns) have the potential to
exceed engine operating limits. If an extended aggravated spin is
encountered, the pilot should recover the aircraft and check if any engine
operating limits were exceeded.
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