IRIS TEXAN II - Flap and Speed Brake Controls

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FOR SIMULATION USE ONLY – NOT A TRAINING AID
FLAP AND SPEED BRAKE CONTROLS
The split flaps may be operated at airspeeds up to 150 KIAS.
There is very little pitch trim change when flaps are selected to the take-off
position, and there is no apparent aerodynamic buffeting up to 150 KIAS.
Lowering the flaps to the LDG position produces a slight pitch up, which is easily
controllable.
Aerodynamic and airframe buffeting is noticeable as airspeed is increased in this
configuration.
Buffeting intensifies noticeably as the flap limit airspeed is approached.
Extension of the speed brake at airspeeds throughout the operating envelope
produces a slight pitch up tendency, which becomes more pronounced as airspeed
increases.
The pitch trim change requirement is reduced by a speed brake/elevator trim
interconnect. During speed brake extension, the elevator is trimmed nose down.
During retraction, the mechanical linkage trims nose up.
The pilot will notice this trim change as the control stick moves slightly during
speed brake operation.
Flap/Speed Brake Interconnect
A flap/speed brake interconnect (lockout) prevents the use of the speed brake with
the flaps extended. If the flaps are extended, the speed brake will not extend if
retracted.
If the speed brake has been extended, it will automatically retract if the flaps are
set to any position other than UP.