TM 55-1510-222-10
lbs, add the fuel required to climb, plus any fuel used in
cruise before reaching each MEA, to determine the
maximum allowable takeoff weight to meet the
requirement for each route segment of the trip.
f.
Minimum
Static
Takeoff
Power
(Flaps
Approach). Enter the graph at 15°C FAT and 3499 feet
pressure altitude:
Minimum Static Takeoff Power ............................... 95%
g.
Takeoff Speeds. Tables are provided for the
takeoff decision speed (V,), rotation speed (VR), takeoff
safety speed (V2.), and all-engines takeoff safety speed
(V50). In order to determine the takeoff speeds for 15°
C FAT, 3499 feet pressure altitude, and 16,000 pounds
takeoff weight, enter the tables at 2000 ft and 4000 ft
pressure altitude, 10°C and 20°C FAT, and 16,000
pounds takeoff weight, then interpolate to find the actual
values for the specified conditions:
FLAPS
FLAPS
UP
APPROACH
V1................................ ..... 116
KTS
111 KTS
VR ............................................... ........ 121 KTS
111 KTS
V2........................................ 121 KTS
112 KTS
V50.............................................. ........ 129 KTS
120 KTS
h.
Minimum Field Length. The following example
illustrates the use of graphs which may restrict takeoff
weight due to field length available under existing
conditions.
(1) Takeoff Distance. Enter the graphs at 15°C,
3499 feet pressure altitude, 16,000 pounds, and 10
knots headwind component, and obtain the following
results:
Takeoff Distance (FLAPS UP)..............................4790 ft
Takeoff Distance (FLAPS DOWN) .......................3920 ft
(2) Accelerate-Stop Distance. Enter the graphs
at 15°C, 3499 feet pressure altitude, 16,000 pounds,
1.9% downhill runway gradient, and 10 knots headwind
component, and obtain the following results:
Accelerate-Stop Distance (FLAPS UP)................ 5480 ft
Accelerate-Stop Distance (FLAPS APPROACH)..5100 ft
(3) Accelerate-Go Distance. Enter the graphs
at 15°C, 3499 feet pressure altitude, 16,000 pounds,
1.9% downhill runway gradient, and 10 knots headwind
component, and obtain the following results:
Accelerate-Go Distance (FLAPS UP)...................5810 ft
Accelerate-Go Distance (FLAPS APPROACH) ....4500 ft
The minimum recommended runway length is the
longest of the distances determined above for the
selected flap setting.
i.
Takeoff Path - One Engine Inoperative. Graphs
are provided to estimate the horizontal distance required
to reach a height of 1500 feet, or the minimum climb
gradient required to clear an obstacle along the takeoff
flight path. If clearance of obstacles beyond the runway
is required, then these results may restrict takeoff weight
accordingly. The Takeoff Distance extends from brake
release to Reference Zero, which is the horizontal point
along the runway at which the aircraft is 50 feet above
the runway. The Net Takeoff Flight Path begins at Lift-
off and consists of the following segments:
1.
The First Segment Climb extends from Lift-
off to the point where the landing gear
completes
the
retraction
cycle.
The
airspeed is maintained at V2.
2.
The Second Segment Climb begins at the
end of the First Segment and extends to
500 feet above the runway. The airspeed
during the Second Segment is V2.
3.
The
Acceleration
and
Flap
Retraction
Segment consists of an acceleration from
V2 to VENR at a constant height of 500 feet.
If a flaps-approach takeoff was made, begin
flap retraction at VENR.
4.
The Third Segment begins when one-
engine-inoperative climb speed is reached
and flaps are fully retracted at 500 feet, and
extends to 1500 feet above the runway.
Airspeed is maintained at VENR during this
segment.
j.
Takeoff Path Profile (Flaps Approach). The
following examples illustrate the use of the flaps-
approach takeoff path graphs. Enter the graphs at
7-5
