7.10. Airspeed Changes.

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7.10.1. Objective. Smooth, controlled, and deliberate change of airspeed.

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7.10.2. Description. Change of power setting to effect change in airspeed. At completion of the airspeed change, power is set to maintain the new airspeed. The aircraft is trimmed during the airspeed change and fine-tuned at the target airspeed. Normally this is practiced between 110 and 250 KIAS.

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7.10.3. Procedure. To increase airspeed in straight-and-level flight, advance the power beyond the setting required to maintain the new airspeed. As airspeed increases, lift increases so there is a climb tendency. Adjust pitch attitude to maintain altitude. Approaching target airspeed, reduce power to a setting estimated to maintain the new airspeed. Reduce airspeed in the same manner but use an opposite power schedule.

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7.10.4. Trim adjustments will be required almost continually during airspeed changes. Do not neglect the need for rudder trim. An increase in torque generally requires nose-right rudder trim. Likewise, a reduction in torque may require nose-left rudder trim. Speed brake or idle power may be used for rapid airspeed reductions; however, use caution as the susceptibility for spatial disorientation increases with use of the speed brake in IMC.

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