Instrument Flight
Basic Instrument Maneuvers
WINGS LEVEL SPEED DECREASE
To perform normal airspeed decreases, reduce the power below the power requirement for the desired
airspeed, allowing the airspeed to decrease, and then at a lead point of 5 KIAS, advance power as
required for the new airspeed. As airspeed decreases, more noseup trim will be required to maintain level
flight.
When making large or rapid airspeed decreases, reduce the throttle to the power setting for the new
airspeed and extend and verify that the speed brakes are fully extended. When you extend the speed
brakes, expect a pitch-up and anticipate the need to retrim the aircraft to maintain altitude. Because the
airspeed will rapidly decrease, you will need to use a 5-KIAS lead point to retract the speed brakes to
avoid undershooting your desired airspeed. Use this method when you practice the speed change from
250 to 200 KIAS in the T-45A.
To execute a small change in airspeed:
Throttle: Below power setting for desired airspeed
Pitch: Increase as required to maintain level flight
Trim: As required
Lead point for power advancement: 5 KIAS prior to new airspeed
To execute large or rapid changes in airspeed:
Throttle: To power setting for desired airspeed
Speed brakes: Extend
Pitch: Increase as required to maintain level flight
Trim: As required
Lead point for speed brake retraction: 5 KIAS prior to new airspeed
LEVEL SPEED CHANGES IN 1/2 SRT
The procedures for performing turning speed changes combine the same procedures you used for level
speed changes and 1/2 standard rate turns. These maneuvers require a full understanding of the effects
of bank, airspeed, pitch, and power on lift. Proper trim is of paramount importance during these turning
speed changes because of the constantly changing pitch attitude needed to maintain level flight and the
constantly changing AOB needed to maintain a 1/2 SRT.
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