TM 55-1510-215-10
(g) Instrument departure and approach
computed for landing immediately after takeoff in the
procedures.
event of an emergency.
(h) Hazards.
(3) After the takeoff and landing data has
been logged, evaluate the performance/risk tradeoff of
(2) Determine the following conditions from
the following:
the performance charts and enter the information on the
PPC blocks provided.
1. Crosswind conditions.
(a) T/O PWR -Takeoff power. Obtain
2. Takeoff, accelerate-stop and landing
from TORQUE AVAILABLE FOR TAKEOFF chart.
distances.
(b) T/O RUN -Take off distance. Obtain
3. Obstacle clearance.
from TAKEOFF-NORMAL chart.
b. Rear of PPC.
(c) ACC-STOP - Accelerate-stop distance.
Obtain from ACCELERATE-STOP DISTANCE chart. An
(1) Cruise data. Space is provided on the
ACCELERATE-CHECK chart is provided for optional
rear of the PPC for such information as pressure altitude
use during critical length takeoffs.
(PA), free air temperature (FAT), wind speed and
direction (WIND), aircraft weight (WT), power required
(d) Vmc -Minimum single engine control
(PWR), airspeed (KIAS and KTAS), fuel flow (FUEL
RATE) and single engine ceiling (SE CEILING). Power,
airspeed. Obtain from MINIMUM SINGLE ENGINE
airspeed and fuel rate may be obtained from the Cruise
CONTROL AIRSPEED (V mc) chart.
charts. Single engine ceiling may be obtained from the
Operation Envelope chart.
(e) Vr-Vlof -Rotation airspeed and liftoff
airspeed. Obtain from NORMAL ROTATION/TAKEOFF
NOTE
AIRSPEED chart.
BLOCK
SPEED
AND
FUEL
REQUIRED space is provided on the
NOTE
rear of the PPC for use as required.
Performance charts are available for
For the purposes of this manual V
x
climb
and
cruise
information.
will be approximated by the Obstacle
Descent information may be obtained
Clearance Climb airspeed obtained
by interpolating between Cruise
using the Normal Rotation/Takeoff
charts and the Climb/Descent chart.
Airspeed Chart.
The approach spaces may be utilized
to
compute
total
time/fuel/and
(f) Vx-Vy - Best angle of climb airspeed
distance to actual landing.
and best rate of climb airspeed.
Obtain Vx from
(2) Landing data. Space is provided on the
NORMAL ROTATION/TAKEOFF AIRSPEED chart
rear of the PPC for entry of landing data.
This
(obstacle clearance airspeed). Obtain Vy from the MAX
information should be computed prior to landing and
R/C LINE (two engine) using the appropriate CRUISE
reflect actual landing weight so the landing approach
chart.
speed (V ref) and landing distance will be correct. The
instrument approach in use and current weather
(g) Vyse - Best single engine rate of
conditions may also be entered.
climb. Obtain from appropriate CRUISE chart.
7-15. Performance Information.
(h) Vref - Landing approach airspeed.
Obtain from APPROACH SPEED chart. This airspeed
Performance information obtained may make it
shall be computed for landing immediately after takeoff
necessary to alter gross weight, airspeed, altitude, or
in the event of an emergency.
other variables in order to safely operate the aircraft. If
any of these variables are changed on one chart,
(i) LDG RUN - Landing distance.
corresponding changes will be necessary on all other
Obtain from Landing chart. This distance shall be
charts where that information is used.
7-9
