7.15. Vertical-S.

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7.15.1. Objective. Practice instrument cross-check.

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7.15.2. Description. As described in AFMAN 11-202V3, climb or descend at 1,000 fpm and 150 KIAS. Type flown (A-B-C-D) is based on proficiency. Target pitch and power settings are found in Table 7.1, and angle of bank, if used, is normally 30 degrees.

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7.15.3. Procedure. Use procedures for constant rate climbs and descents.

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7.15.4. Technique. Begin with aircraft completely trimmed for level flight at 150 KIAS. Increase or decrease torque approximately 20 percent from level flight setting to climb or descend at 1,000 fpm. Lead pitch reversals with power. Due to the T-6’s tendency to pitch up/left when adding power and pitch down/right with a power reduction, lead the change at the top or bottom of the maneuver by approximately 100 feet or 10% of the VSI. Generally, control VSI with pitch; control airspeed with power. Focus throughout the maneuver, especially roll- in and roll-out, should be on control instruments (ADI and torque gauge) with methodical crosscheck to performance instruments.

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