STEMME S10 - Page 13

DOCUMENT NUMBER:
L400-912810 ISSUE AUG 20, 2016
AMENDMENT: 04
DATE: APR 04, 2022
APPROVED SECTION - PAGE 4-35
AIRCRAFT FLIGHT MANUAL STEMME S10, VARIANT S12
4.5.3.3 GLIDING FLIGHT
GLIDER CONFIGURATION
With the engine stopped, propeller blades folded and nose-cone closed the
S12 is a normal glider with aps.
The S12 has good balanced ight characteristics and well harmonized ight
controls. Bank can be changed from +45° to -45° within about 4,8 seconds
without side-slipping (110 kph / 59 kt, MTOW).
The speed-polar (envelope curve for optimal ap settings) is given in section
5.3.3 “Gliding Flight Polar”.
HIGH SPEED
Up to V
NE
= 270 kph / 146 kt the S12 is well easily controllable.
Above V
A
= 180 kph / 97 kt ight controls can not be deected fully or abruptly.
At V
NE
= 270 kph / 146 kt the control is limited: Not more than 1/3.
Limit load factors are given in section 2.9.
If strong turbulence are anticipated such as in rotors of mountain waves, in
thunderstorms or when passing mountain ridges, the maximum airspeed in
rough air V
RA
= 180 kph / 97 kt must not be exceeded.
Airbrakes should be deployed up to V
NE
= 270 kph / 146 kt.
Flight path during steep decent at V
NE
= 270 kph / 146 kt, airbrakes fully ex-
tended, is -30°.
WARNING
The airbrakes should be deployed carefully above V
A
= 180 kph / 97 kt. A high
deceleration rate results with airbrakes extended at high airspeeds. The
seat belts need to be well tightened and objects in cockpit area need to be
properly secured.