DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
CHAPTERPAGE 25
MAINTENANCE MANUAL STEMME S12
PROPELLER
Design
2-blade folding propeller, CFRP blades, propeller
hub and blade suspension. Forks aluminum.
Pitch control via electrically heated thermo
elements.
Type STEMME 11 AP-V
Propeller diameter 1.63 m 5.35 ft
Mass of the propeller
(incl. outer-casing of needle bearing and
rubber buers)
9350 g 20.61 lb
Overall mass of propeller blade 650 g ± 10 g 1.433 lbs ± 0.022 lb
Max. propeller 2.650 RPM
Propeller blade angle (station 0.7) 17.65° in T/O 24.05° in cruise.
Propeller blade pitch (station 0.7) 114 cm / 44.9 in (T/O position)
160 cm / 63.0 in (cruise position)
Max. current consumption of both resistor
elements
10 A
Propeller turns Counter-clockwise
INFLIGHT CENTER OF GRAVITY RANGE
In-ight center-of-gravity range aft of
datum
(See section 6.3 for center wing leading edge)
265 - 420 mm 10.41 in - 16.5 in
PROPELLER GEARBOX
Design Helical spur gear,
aluminum alloy-housing,
elastic mounting in rubber elements.
Type STEMME 11AG
Drive shaft turns Clockwise
Ratio of propeller gearbox i = 1.109
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