Trim requirements with a change in attitude
Transition to a Basic Climb. Starting from normal cruise, you transition by
adding power and raising the nose to slightly above the climbing attitude
(1215 degrees) allowing the airspeed to decelerate to climb airspeed. As you
approach 120 KIAS, reset the nose attitude (68 degrees). The initial nose
down trim for power addition is negated by raising the nose to slightly above
the climbing attitude. Thus, trim is right rudder, up elevator to hold the new
attitude during deceleration.
Level off from a Basic Climb. Two hundred feet prior to level off altitude,
lower the nose toward the horizon and accelerate toward normal cruise while
maintaining a shallow climb.
Trim left rudder and down elevator as the aircraft accelerates.
Approaching assigned altitude, lower nose to the level flight attitude.
Two to three KIAS prior to 150 KIAS, reduce PCL to cruise power setting
Transition to a Descent. Using the P.A.T. principle, reduce power and lower
the nose. Airspeed will remain the same as it was before the descent.
Trim is left rudder for power reduction.
Up elevator trim is required to hold the new attitude.
Level off from a Descent. Using the P.A.T. principle, 100 feet prior to the desired
level off altitude, add power to normal cruise power setting, and raise the nose to
the level flight attitude and retrim.
Trim is right rudder for power addition.
Down elevator is required to hold the new attitude.
Further trim examples are discussed in sections dealing with specific maneuvers. Changes in
power, airspeed, and attitudes will require trim combinations as in the following example:
BASIC INSTRUMENTS GENERAL PROCEDURES 2-3