Pipistrel ALPHA Trainer - Take-off performance

ALPHA Trainerwww.pipistrel-aircraft.com
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POH-162-00-40-050
Performance
5-3
Take-off performance
All data published in this section was obtained under following conditions:
Aircraft at MTOM
Elevation: sea level
Wind: calm
Runway: hard runway
Data extrapolated for ICAO standard atmosphere
ALPHA Trainer ALPHA Trainer
Takeoff ground roll at MTOM 555 ft
Takeoff runway length (over 50 ft/15 m obstacle) 870 ft
NOTE In order to meet the data for takeoff runway length over 50 ft obstacle maintain Vx (58
kts, 108 km/h) after take-off.
Soft (grass) runways increase the published take-off performance data by 20%.
Takeoff runway length may vary depending on the wind, temperature, elevation and wing &
propeller surface condition.
Effect of elevation
The table below provides data about the effect of elevation on takeoff runway length.
Elevation ft (m) 0 1650 (500) 3280 (1000) 4920 (1500)
Atmosph. pressure (inHg) 29.92 28.17 26.52 24.95
Atmosph. pressure (hPa) 1013 954 898 845
Outside temperature
(°C) 15,0 11,7 8,5 5,2
Outside temperature (°F) 59 53 47 41
Takeoff ground roll [
ft]
ALPHA Trainer 555 700 870
1090
Takeoff distance over 50 ft / 15 m obstacle [ft]
ALPHA Trainer 870 1035 1295
1420
WARNING: Calculating take-off performance in Hot Atmosphere, it is mandatory to con-
sider the takeoff runway length prolongs as follows:
L = 1,10 • (L
h
+ L
t
- L
0
).
Abbreviations are as follows:
L
h
= takeoff runway length at present elevation, ISA standard conditions
L
t
= takeoff runway length at sea level at same temperature/wind as on the given location,
L
0
= zero wind takeoff runway length at 15°C at sea level.
e.g. if outside temperature is 25°C and you are on 500 m elevation, your takeoff runway length
will be:
L = 1,10 • (L
h
+ L
t
- L
0
) = 1,10 • (205 m + 215 m - 180 m) = 264 meters.