STEMME S15

The motorglider Stemme S15 is a two-seat single-engined, all composite construction, powered sailplane with the engine mounted in the centre of the fuselage. The cockpit has room for two in side-by-side configuration that enables to mount a rack with scientific equipment in the place of the co-pilot seat, considering that the aircraft can be operated as a single-piloted platform. It has a three-blade constant speed propeller, conventional T-tail and a retractable and steerable nose wheel landing gear. It also features a 2-axis autopilot system for elevator and aileron control. It can reach a maximum ceiling of 16000 ft above mean sea level and the endurance is ca. 6 hours with a max range of 1100 km.

The Stemme S15 has a shoulder wing that has been equipped with underwing pods for equipment installation. It also features a payload compartment in the rear of the fuselage’s mid section and the possibility to mount a rack with scientific equipment in the place of the co-pilot seat. The max payload is 200 kg for one crew member (pilot) and 110 kg for two crew members (pilot and operator). The max mass of the external pods is 80 kg each one with a max asymmetric mass difference in pods of 30 kg.

TECHNICAL SPECIFICATIONS

• Dimensions:
  • Total length: 8.52 m
  • Total height: 2.45 m
  • Span: 18.00 m
• MTOW (Maximum Take Off Weight): 1100 kg
• Maximum payload: 200 kg
• Maximum operating speed: 265 km/h (143 kts)
• Minimum control speed: 94 – 107 km/h (51 - 58 kts)
• Service ceiling: 4875 m (16000 ft)
• Range: 1100 km (594 NM)
• Endurance: 6 h