Rotorcraft Flying Handbook, FAA-H-8083-21

8
TOTAL TAKEOFF DISTANCE
TO CLEAR 50 FT. OBSTACLE
Running Takeoff to 30 MPH & Climb out at 50 MPH CAS
Weight 1800 LBS Rotor Prerotated to 370 RPM
Zero Wind
Pressure Altitude in Feet (x 1000)
7
6
5
4
3
2
1
0° F
20° F
Std. Temp.
40° F
60° F
80° F
100° F
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
Total Takeoff Distance to Clear 50 FT Obstacle in Feet (x 100)
Figure 19-5. Takeoff performance chart.
rotor prerotation speed of 370 r.p.m., and no wind.
Variations from these conditions alter performance,
possibly to the point of jeopardizing the successful outcome
of the maneuver.
which provide important information that may not be
committed to memory.
HEIGHT/VELOCITY DIAGRAM
Like helicopters, gyroplanes have a height/velocity
diagram that defines what speed and altitude combinations
allow for a safe landing in the event of an engine
failure. [Figure 19-6]
400
HEIGHT vs. VELOCITY
FOR SAFE LANDING
Avoid Continuous Operation In
Shaded Area.
During an engine-out landing, the cyclic flare is used to
arrest the vertical velocity of the aircraft and most of the
forward velocity. On gyroplanes with a manual collective
control, increasing blade pitch just prior to touchdown
can further reduce ground roll. Typically, a
gyroplane has a lower rotor disc loading than a helicopter,
which provides a slower rate of descent in autorotation.
The power required to turn the main transmission,
tail rotor transmission, and tail rotor also add to the
higher descent rate of a helicopter in autorotation as
compared with that of a gyroplane.
Height Above Runway In Feet
300
200
100
0
0 20 40 60 80 100
EMERGENCY SECTION
Because in-flight emergencies may not allow enough
time to reference the flight manual, the emergency section
should be reviewed periodically to maintain
familiarity with these procedures. Many aircraft also
use placards and instrument markings in the cockpit,
Indicated Airspeed In MPH
Figure 19-6. Operations within the shaded area of a
height/velocity diagram may not allow for a safe landing and
are to be avoided.
19-3