kpayne on VMOFRWIN702 with $$_JOB

VerDate Sep<11>2014
Record results for at least two
sideslip angles on either side of
the trim point. The force may
be shown as a cross plot for irreversible systems. May be a
series of snapshot tests.

X

X

X

2.d.3. .....................

Dynamic Lateral and Directional Stability.

2.d.3.a. ..................

Lateral-Directional Oscillations.

Section0.5 sec. or Section10% of period.
Section10% of time to 1-2 or double
amplitude or Section0.02 of damping
ratio. Section20% or Section1 sec of time
difference between peaks of
bank and sideslip. For non-periodic responses, the time history
must be matched within Section10
knots Airspeed; Section5Section/s Roll Rate
or Section5Section Roll Attitude; Section4Section/s Yaw
Rate or Section4Section Yaw Angle over a
20 sec period roll angle following release of the controls.

Cruise or Climb Augmentation On and
Off.

Record results for at least two airspeeds. The test must be initiated with a cyclic or a pedal
doublet input. Record results
for six full cycles (12 overshoots after input completed) or
that sufficient to determine time
to 1-2 or double amplitude,
whichever is less. The test may
be terminated prior to 20 sec if
the test pilot determines that
the results are becoming uncontrollably divergent.

X

X

X

2.d.3.b. ..................

Spiral Stability ...............

Section2Section or Section10% roll angle .................

Cruise or Climb. Augmentation On and
Off.

Record the results of a release
from pedal only or cyclic only
turns for 20 sec. Results must
be recorded from turns in both
directions. Terminate check at
zero roll angle or when the test
pilot determines that the attitude is becoming uncontrollably
divergent.

X

X

X

2.d.3.c. ...................

Adverse/Proverse Yaw ..

Correct Trend, Section2Section transient sideslip angle.

Cruise or Climb. Augmentation On and
Off.

Record the time history of initial
entry into cyclic only turns,
using only a moderate rate for
cyclic input. Results must be
recorded for turns in both directions.

X

X

X

3.

Reserved

PO 00000

Lateral Control Position - Section10% of
change from trim or Section0.25 in.
(6.3 mm) or Lateral Control
Force - Section0.5 lb. (0.223 daN) or
10%. Roll Attitude - Section1.5 Directional Control Position - Section10%
of change from trim or Section0.25 in.
(6.3 mm) or Directional Control
Force - Section1 lb. (0.448 daN) or
10%. Longitudinal Control Position - Section10% of change from trim
or Section0.25 in. (6.3 mm). Vertical
Velocity - Section100 fpm (0.50m/
sec) or 10%.

This is a steady heading
sideslip test at a fixed
collective position.

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PC31

Pt. 60, App. D

Cruise; or Climb
(may use Descent
instead of Climb if
desired) Augmentation On and
Off.

Jkt 247047

Directional Static Stability.

Federal Aviation Administration, DOT

16:30 Jun 25, 2019

2.d.2. .....................