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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
WIND AND TEMPERATURE AND PERFORMANCE PLANNING
Temperature and especially wind plays a significant role in performance
planning. The wind accounts for as much as one-third of the ground
speed. When flying a fixed Mach number, the true airspeed is roughly
5% higher when the temperature is increased by 20_C. The increased
temperature also effects the fuel flow, the MAX attainable altitude, and
so on. Therefore, the closer the entered winds and temperatures are
to the actual encountered conditions, the better the FMS performance
predictions.
Takeoff Pages
Database information about the departure surface (when one has been
selected) is displayed on the TAKEOFF 1/2 page, shown in
Figure 5--16.
1L -- When the surface is a runway:
D
— The selected surface identifier is displayed. The runway heading
is displayed for runway in the navigation database. When no
runway has been selected in the flight plan, or a different runway
is desired, entry of the runway number or runway heading is
made on this line.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
Figure 5- -16
TAKEOFF 1/2 Page
Performance
5-27
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