STEMME S10 - Page 21

DOCUMENT NUMBER:
L400-912810 ISSUE AUG 20, 2016
AMENDMENT: 04
DATE: APR 04, 2022
APPROVED SECTION - PAGE 4-43
AIRCRAFT FLIGHT MANUAL STEMME S10, VARIANT S12
4.5.3.5 FLYING IN STRONG TURBULENCE
When encountering areas with strong turbulence or crossing strong thermals
airspeed must be reduced to below V
RA
= 180 kph / 97 kt.
4.5.3.6 COLD WEATHER OPERATION
Before operating the aircraft in cold areas, an inspection is recommended.
In particular, coolant and lubrication uid must be checked (refer to section
2.4.2 Fluids).
Engine starting at low OAT:
• Start engine with throttle full IDLE and with choke ON (open throttle
renders starting carb ineective!)
•
Crankshaft speed of at least 220 RPM is required for ignition to
function.
•
As the performance of the electric starter is greatly reduced when hot
and the battery capacity is low at cold temperatures, limit starting
attempts to periods no longer than 10 seconds. With a well charged
battery, adding a second battery will not improve cold cranking
performance.
WARNING
If the OAT is below -10° C / 14° F, i.e. at high altitudes or in cold areas, battery
capacity might be too low to crank the engine with more than 220 RPM for
ignition. Successful engine restart might only be possible at higher tem-
peratures and lower altitudes. This must be taken into account for ight and
route planning.
CAUTION
Any water present in the fuel system will seek to the lowest areas of the fuel
system and freeze at low temperatures. This can block fuel pipes, lters and
orices. Thus, it is particularly important to drain the fuel system properly to
remove contained water especially when low OAT must be expected. Refer to
section 4.3 Daily Inspection.