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TM 1-1510-218-10
Decreasing the load and/or fuel.
Reducing takeoff weight and using flaps 40%.
Delaying the departure for more favorable
weather conditions.
(10) V
(Takeoff Decision Speed) / V
1
Speed). In the C-12 aircraft V
same speed. Use the tabular data table at the top of
Figure 7-18, Take-Off Distance, Flaps 0% or Figure
7-21, Take-Off Distance, Flaps 40%.
The takeoff configuration for this example is
Flaps 0%. The V
/V
speed is 103 KIAS.
r
1
Enter the speed, 103 KIAS, in the appropriate
block on the TOLD card.
(11) V
/ V
. Use the tabular data table at the
yse
2
top of Figure 7-27. Climb – One Engine Inoperative. In
accordance with the ATM, flaps are retracted just after
liftoff at 105 KIAS for both a normal takeoff and in the
event of an engine failure after V
KNOTS, Figure 7-27, is V
same speed as V
for a takeoff with flaps at 0%.
2
Consequently, V
flaps 0% and V
2
speed for entry on the TOLD card. V
12,400 pound aircraft is 121 KIAS.
Enter the speed in the appropriate block on the
TOLD card.
(11A) If conducting an obstacle clearance
climb, use the "Vx" speed from the TAKEOFF
DISTANCE – FLAPS APPROACH chart.
(12) Climb Gradient Altitude.
altitude to which the single engine climb gradient must
be continued as specified in the applicable DP. The
information is advisory and intended as a reminder to
the crew of the altitude to which they must climb at V
V
in order to clear obstacles.
yse
For this example, the DP specified climbing to
5000 feet MSL.
Enter the altitude, 5000 feet, in the appropriate
block on the TOLD card.
Items 13 through 17 are initially calculated
at takeoff weight as a contingency for a
necessary return to the takeoff airport right
after departure.
calculated for the arrival at the destination.
7-6
(Rotation
r
and V
are always the
r
1
.
The V
1
and is essentially the
yse
are used as the V
yse
/ V
yse
2
This is the
NOTE
The items must be re-
(13) Runway Length Available.
runway length available for landing.
For this example, the runway length is 6000 feet
and there is no displaced threshold or other
information limiting the useful landing distance of the
runway.
Enter the length, 6000 feet, in the appropriate
block on the TOLD card.
(14) Landing Weight. For the takeoff TOLD
card, landing and takeoff weights are the same. For
arrival at the destination the TOLD card must be re-
calculated to reflect actual aircraft weight and airport
conditions.
For this example, takeoff and landing weight is
12,400 pounds.
Enter the weight, 12,400 pounds, in the
appropriate block on the TOLD card.
/V
-
(15) V
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2
the intended landing weight if the landing will be
accomplished using Flaps DOWN (100%).
landing will be accomplished with the Flaps at 40%, or
2
for a
any setting greater than APPROACH but less than
100%, then V
FLAPS 40%). Use Figure 7-9, Stall Speeds – Power
Idle to determine applicable stall speeds.
For this example, the landing weight (assuming
an emergency return to the departure airport) is
12,400 pounds a landing with the Flaps DOWN
(100%) is planned. The V
is 74.8 KIAS. Therefore, V
and is rounded up to 98 KIAS.
There is another method to determine V
the landing will be accomplished with the Flaps
/
DOWN.
Subtract 5 KIAS from the APPROACH
2
SPEED ~ KNOTS obtained from the tabular data table
at the top of Figure 7-30, Landing Distance Without
Propeller Reversing, Flaps 100%. For a 12,400 pound
aircraft the given APPROACH SPEED is 103 KIAS –
5 KIAS = 98 KIAS.
As another example, if the landing was planned
using the Flaps at APPROACH (40%), or any
intermediate setting short of DOWN (100%), then the
V
speed would be 1.3 times V
ref
APPROACH stall speed). FLAPS APPROACH stall
speed for a 12,400 pound aircraft is 84.8 KIAS.
Therefore, the V
is rounded up to 111 KIAS.
Speed. This speed is 1.3 times V
ref
is 1.3 times V
(the stall speed for
s
ref
1
for a 12,400 pound aircraft
so
is 1.3 times 75 = 97.5
ref
speed is 1.3 times 85 = 110.5 and
ref
This is the
at
so
If the
when
ref
(the FLAPS
s
1
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