Quantcast Instrument Turns - P-8210039

 

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BASIC INSTRUMENT PROCEDURES
CHAPTER ONE
Accelerating Level Speed Change
Add power to MRT, trimming the aircraft as the airspeed increases. As the airspeed approaches
normal cruise, adjust the power to normal cruise power setting and retrim as required.
Level Speed Change To Basic Approach Configuration
Reduce the power to approximately 75% RPM and extend the speed brakes. At 165 KIAS,
lower the landing gear and set the flaps to one-half. As the flaps are lowered, retract the speed
brakes. The aircraft will tend to "balloon" as the flaps are lowered, but this tendency can be
compensated by lowering the nose attitude slightly. As the aircraft decelerates, raise the nose to
maintain altitude. Approaching 15 units AOA, add power as required to maintain 15 units and
level flight, and initiate the Landing Checklist (the landing checklist cannot be completed until
the speed brakes are extended.)
108. INSTRUMENT TURNS
1.
Constant Angle Of Bank Turns
A constant angle of bank turn is accomplished by rolling smoothly into the desired angle of bank
referencing the vertical gyro indicator, then maintaining that angle of bank throughout the turn.
The nose attitude is crosschecked with the altimeter and vertical speed indicator. Altitude
corrections will be performed as in level flight.
2.
The "One-fifth Rule"
To prevent turning beyond a desired heading, it is necessary to anticipate reaching the new
heading. A good "rule of thumb" is to lead the new heading by a number of degrees equal to
one-fifth the angle of bank used in the turn. If, for example, the angle of bank is 30, the rollout
should be started 6 prior to reaching the desired heading. This rule will be used whenever any
type of turn is made to a specific heading. Add power as necessary to maintain the airspeed with
which the turn was started. During level, constant speed turns; it is not necessary to trim the
nose, since the trim will have to be taken out immediately after rollout. Simply maintain
backstick pressure during the turn, and relax it when rolling wings level.
3.
Turn Pattern
The turn pattern will be initiated on a cardinal heading and is flown maintaining normal cruise
airspeed and constant altitude. The pattern consists of two 15 banked turns in opposite
directions through 30 of turn, followed by two 30 banked turns through 60 of turn, and two 45
banked turns through 90 of turn. A smooth reversal is made from one turn to the other, omitting
any straight and level legs. The one-fifth rule is used in leading the reversals and roll out. Due
to the increased aerodynamic loads imposed on the aircraft during turns, additional power will be
required to maintain airspeed, and additional back stick will be required to maintain altitude.
BASIC INSTRUMENT PROCEDURES 1-27


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