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IRIS TEXAN II - Departures from Controlled Flight (OCF)

IRIS TEXAN II
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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 | 208
FOR SIMULATION USE ONLY – NOT A TRAINING AID
4. As flying speed is regained, smoothly increase back pressure on the control stick
to stop the altitude loss and return to level flight, taking care to avoid entering a
secondary, accelerated stall during recovery.
Altitude lost during recovery from a wings-level stall is usually less than 100 feet,
assuming a prompt application of recovery power.
Power-on, accelerated and inverted stall recoveries will lose even less altitude to
regain flying speed; however, these stalls will most likely result in an unusual
attitude requiring more altitude for recovery.
DEPARTURES FROM CONTROLLED FLIGHT
DEPARTURES/OUT-OF-CONTROL FLIGHT (OCF)
A situation in which the aircraft does not respond immediately and in a normal
sense to application of flight controls is considered out-of-control flight (OCF) or a
departure.
OCF is the seemingly random motion of the aircraft about one or more axes, usually
resulting from a stalled condition in which the inertial forces on the aircraft exceed
the authority of the aerodynamic controls (ailerons, elevator, and rudder).
For this reason, initial aircraft motions may not be halted by any application of flight
controls and motions may be opposite the direction of the applied control.
Certain control applications may intensify the OCF motions. OCF typically results
from a stall in accelerated or out-of-balance (uncoordinated) flight conditions or a
stall where improper or overly aggressive control inputs are applied.
In general, OCF can be divided into three categories:
Post-stall gyrations, incipient spins, and steady-state spins.
Post-stall Gyrations
Post stall gyrations are the motions of the aircraft about one or more axes
immediately following a stall and prior to the incipient spin. A post stall gyration can
usually be identified by uncommanded (and often rapid) aircraft motions about any
axis, a feeling that the controls are no longer effective nor acting in the normal
sense, stalled or near-stalled angle of attack, transient or erratic airspeed
indications, and random turn needle deflections.
A post stall gyration can occur at high airspeed (following an accelerated stall) or
at low airspeed (following a normal stall). At high airspeed, the post stall gyration

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