Flight Manual STEMME S 10 Date of Issue Oct. 10, 1990 page: 31
Amendment No.: -- Date: --
LBA-approved
A4010013_08a-31/13.11.2015 14:34:00/14:34
4.5.6 High Altitude Flight
Justification of flutter behavior of the type STEMME S 10 has been performed at altitudes of 2000 m MSL
(6500 ft) and above. Based on these tests the maximum airspeed v
NE
has been established as indicated
airspeed (IAS) between 0 and 6500 ft MSL with 146 kts (168 mph / 270 km/h; IAS = TAS at 6500 ft MSL).
In order to avoid exceeding of the maximum permissible true airspeed above 6500 ft MSL the maximum
permissible indicated airspeed is reduced with increasing altitude. This is due to the installed airspeed
indicator system, the reading of which depends on the pitot/static air pressure and thus also on the air density
which decreases with increasing altitude. Based on the ICAO-Standard Atmosphere (ISA) reduction -
deviating fromthe ASI marking - is established in the following steps:
from 6500 ft / 2.000 m MSL up to V
NE
(TAS) = 146 kts (168 mph / 270 km/h) corresponds to
[ft MSL] [m MSL] [kts (IAS)] [mph (IAS)] [km/h (IAS)]
10.000 3.000 139 159 257
13.000 4.000 132 151 244
16.500 5.000 125 144 231
19.500 6.000 118 136 219
26.000 8.000 105 121 195
33.000 10.000 93 107 173
39.500 12.000 81 93 150
The above speed limits are to be kept with special attentiveness, since freedom of flutter for the type
STEMME S 10 can be guaranteed only up to these values
4.5.7 Flight in Rain
During flight in rain the stalling speed increases by up to 10%. Accordingly the approach speed for landing
has to be increased by up to 10 %.
The take-off run can increase by up to 50%. A soft surface of the runway will further increase the take off run.
The climb rate can be reduced by up to 50%. For these reasons it is strongly advised not to fly with wet wings
and/or during rain.
4.5.8 Aerobatics
Aerobatics are not permitted.
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