Instrument Flight
Constant Airspeed Climbs and Descents
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 kts 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 kts 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.
Accelerating Timed Turn
Using a 3-second lead, begin the maneuver by simultaneously advancing the throttle to MRT and rolling
the aircraft to a bank angle (approximately 10 percent of the airspeed) for a 1/2 standard rate turn. You
can accurately predict that the bank will require an increase in back-stick pressure to maintain level flight.
On the other hand, as the airspeed increases, the aircraft will tend to pitch up, requiring less aft stick to
maintain level flight. To maintain solid aircraft control during the maneuver, you must perform a very
efficient scan. Scan the ADI display for pitch and bank control, the altitude trend indicator and/or VSI for
pitch performance information, the airspeed trend indicator for power performance information, and the
clock for turn performance information. Additionally, as airspeed builds, you will have to increase AOB to
maintain a turn rate of 1 needle-width deflection. You will normally perform this accelerating airspeed turn
from 200 to 250 KIAS.
Throttle: MRT (for 20 KIAS increase or greater)
Bank angle: Approximately 10 percent of IAS (1 needle-width)
Clock: Every 20 seconds for 30 degrees of heading change
Pitch: As required to maintain altitude
Lead point for roll-out: 1/3 of the AOB
Lead point for power reduction: 5 kts
Trim: As required
Proper trim is key to maintaining good aircraft control during the maneuver.
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