Sinus 912 LSA Glider 550 MTOW
www.pipistrel.eu
REV. 3
Effect of elevation
The table below provides data about the effect of elevation on takeoff runway length.
elevation (ft)
0
1500
3000
4500
atmosph. pressure (inHg)
29.92
28.17
26.52
24.95
atmosph. pressure (hPa)
1012
954
898
845
outside temperature (°F)
59
53
47
41
outside temperature (°C)
15,0
11,7
8,5
5,2
Takeoff ground roll [ft
(m)
]
912 LSA
430
(132)
555 (160)
705 (205)
825
(242)
WARNING:
If the outside temperature is higher than 15°C / 59°F it is mandatory to consider
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,
L
t
= takeoff runway length at sea level at same atmospheric conditions,
L
0
= takeoff runway length at 59°F.
Performance
Effect of the wind
Wind (head, cross or tailwind) affects aircraft’s ground speed (GS).
Headwind on takeoff and landing causes the Takeoff and Landing runway length to shorten as the
GS is smaller during these two flight stages. The opposite stands for tailwind on takeoff and landing
as tailwind prolongs Takeoff and Landing runway length significantly.
The data on the next page was obtained through testing and therefore serve as informative values
only.
Headwind
shortens takeoff and landing runway length by 25 feet (8 meters) with every 3 kts
(5 km/h) of wind increase (e.g. provided there is a 6 kts (10 km/h) headwind on takeoff and landing,
distances will be approximately 50 ft meters (16 meters) shorter than ones published in the manual).
Tailwind
prolongs takeoff and landing runway length by 60-65 feet (18-20 meters) with every 3 kts
(5 km/h) wind increase (e.g. provided there is a 6 kts (10 km/h) tailwind on takeoff or landing, dis-
tances will be approximately 120-130 feet (36-40 meters) longer then ones published in the manual).
WARNING!
Tailwind affects takeoff and landing performance by more than twice as much as
headwind does.
The table below provides data about the effect of headwind (+) and tailwind (-) on takeoff runway
length (referenced for sea level conditions, airplane at MTOM).
windspeed (kts)
-6
-4
-2
0
4
8
12
Takeoff runway length [ft (m)]
912 LSA
560 (170)
520 (158)
475 (144)
430
(132)
400 (122)
360 (110)
330 (100)
5-3
