43
Federal Aviation Administration, DOT
Pt. 60, App. A
1.b.2.
.............
Minimum Control
Speed
¥
ground (V
mcg
)
using aerodynamic
controls only (per appli-
cable airworthiness
standard) or alternative
low speed engine inop-
erative test to dem-
onstrate ground control
characteristics.
±
25% of maximum airplane
lateral deviation or
±
5 ft
(1.5 m). Additionally, for
those simulators of air-
planes with reversible
flight control systems:
Rudder pedal force;
±
10%
or
±
5 lb (2.2 daN).
Takeoff
.........................
Engine failure speed must be within
±
1
knot of airplane engine failure speed.
Engine thrust decay must be that re-
sulting from the mathematical model
for the engine variant applicable to the
FFS under test. If the modeled engine
is not the same as the airplane manu-
facturer’s flight test engine, a further
test may be run with the same initial
conditions using the thrust from the
flight test data as the driving param-
eter.
X X X X
If
a
V
mcg
test is not
available an accept-
able alternative is a
flight test snap en-
gine deceleration to
idle at a speed be-
tween V
1
and V
1
¥
10 knots, followed
by control of head-
ing using aero-
dynamic control
only. Recovery
should be achieved
with the main gear
on the ground. To
ensure only aero-
dynamic control is
used, nosewheel
steering should be
disabled (i.e.,
castored) or the
nosewheel held
slightly off the
ground.
1.b.3.
.............
Minimum Unstick Speed
(V
mu
) or equivalent test
to demonstrate early
rotation takeoff charac-
teristics.
±
3 kts airspeed
±
1.5
°
pitch
angle.
Takeoff
.........................
Record main landing gear strut compres-
sion or equivalent air/ground signal.
Record from 10 kt before start of rota-
tion until at least 5 seconds after the
occurrence of main gear lift-off.
X X X X
V
mu
is defined as the
minimum speed at
which the last main
landing gear leaves
the ground. Main
landing gear strut
compression or
equivalent air/ground
signal should be re-
corded. If a V
mu
test
is not available, al-
ternative acceptable
flight tests are a
constant high-atti-
tude take-off run
through main gear
lift-off or an early ro-
tation take-off.
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