351 

Federal Aviation Administration, DOT 

Pt. 60, App. C 

2.d.3. ..........

Dynamic Lateral and Directional Stability 

2.d.3.a. .......

Lateral-Directional Oscilla-

tions. 

±

0.5 sec. or 

±

10% of period, 

±

10% of time to 

1

⁄

2

or dou-

ble amplitude or 

±

0.02 of 

damping ratio, 

±

20% or 

±

1 

sec of time difference be-
tween peaks of bank and 
sideslip. For non-periodic 
responses, the time history 
must be matched within 

±

10 knots Airspeed; 

±

5

°

/s 

Roll Rate or 

±

5

° 

Roll Atti-

tude; 

±

4

°

/s Yaw Rate or 

±

4

° 

Yaw Angle over a 20 

sec period roll angle fol-
lowing release of the con-
trols. 

Cruise or Climb. Augmenta-

tion On and Off. 

Record results for at least 

two airspeeds. The test 
must be initiated with a cy-
clic 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 ampli-

tude, whichever is less. 
The test may be terminated 
prior to 20 sec if the test 
pilot determines that the re-
sults are becoming uncon-
trollably divergent. 

X X X 

2.d.3.b. .......

Spiral Stability. 

±

2

° 

or 

±

10% roll angle. 

Cruise or Climb. Augmenta-

tion On and Off. 

Record the results of a re-

lease from pedal only or 
cyclic only turns for 20 sec. 
Results must be recorded 
from turns in both direc-
tions. 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, 

±

2

° 

transient 

sideslip angle. 

Cruise or Climb. Augmenta-

tion On and Off. 

Record the time history of ini-

tial entry into cyclic only 
turns, using only a mod-
erate rate for cyclic input. 
Results must be recorded 
for turns in both directions. 

X X X 

3. Motion System 

3.a. .............

Frequency response 

Based on Simulator Capa-

bility. 

N/A .........................................

Required as part of the 

MQTG. The test must dem-
onstrate frequency re-
sponse of the motion sys-
tem as specified by the ap-
plicant for flight simulator 
qualification. 

X X X 

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