FLIGHT MANUAL TSA-M, VARIANT S6
Doc.-No.:P400-006.000 E
Page: 4-32
Revision: 1
Date of Issue: 07. October 2008
Agency approved
Date of Rev.: 28.01.2011
4.7.7
Flights at High Altitude
The actual air-speed (TAS) at high altitudes is above the indicated air-speed
(IAS). There is no restriction to the allowed flight-envelope below FL65 (2000m).
Above this altitude, the never-exceed speed v
NE
is decreased according to the
decrease in air-density. This is shown in the following tables:
Flight Level
Flight Level
Never-Exceed Speed v
NE
ft MSL
m MSL
kts / km/h (IAS)
0
0
146 kts / 270 km/h
3300
1000
146 kts / 270 km/h
6500
2000
146 kts / 270 km/h
10000
3000
138 kts / 255 km/h
13000
4000
132 kts / 245 km/h
16500
5000
124 kts / 230 km/h
19500
6000
119 kts / 220 km/h
26000
8000
105 kts / 195 km/h
33000
10000
92 kts / 170 km/h
39500
12000
81 kts / 150 km/h
Always keep the air-speed below the never-exceed speeds given above. Only
then can it be guaranteed that the motorglider will not flutter.
Due to the extremely low outside-air-temperatures (OAT) at high altitude it is
possible that the capacity of the battery is reduced significantly. This might
prevent the engine from being started with the electric starter. Starting the
engine might only be possible once lower altitudes are reached and the battery
has been allowed to warm up again. The engine-manufacturer mentions a
minimum temperature of the battery of –13°F / –25°C. Starting the engine by
windmilling the propeller should be possible. However, this has not been tried in
flight tests. The above restrictions should be considered in flight-planning.
At high altitudes ice can form on the inside of the canopy due to freezing breath.
This can significantly reduce the visibility. If necessary, sink to a lower altitude
with higher temperatures and/or lower humidity. If needed, open the emergency-
window.