Revolutionary Electric Propulsion
The ASG-32EL emerged from an ambitious consortium led by Alexander Schleicher in partnership with the University of Kassel and University Baden-Württemberg Mosbach, funded through the Hessen "LOEWE" program. The electric variant builds upon the foundation established by designer Michael Greiner's original ASG-32, which first flew on May 31, 2014. The electric model's maiden flight on June 16, 2016, piloted by Dipl. Engineer Paul Anklam and Joschka Schmeisl, confirmed theoretical performance predictions by achieving 1,500 meters of altitude gain in 20 minutes.
Technical Innovation
The ASG-32EL's electric propulsion system delivers 25 kW (34 hp) through a synchronous motor powered by lithium-ion batteries. This configuration provides 20 minutes of full-power operation with a climb rate of 1.3 meters per second, enabling sustainer flights without fossil fuels. The system's operational range extends to 100 kilometers in climb-and-glide operations with two pilots aboard, representing a significant advancement in electric aircraft capability for its era.
The aircraft's design emphasizes safety through simplicity, featuring a straightforward battery block configuration with a main fuse system. This approach reduces complexity while maintaining the reliability essential for aviation applications.
The Manufacturer's Legacy
Alexander Schleicher Segelflugzeugbau, founded in 1951 by Alexander Schleicher, has operated continuously from its Poppenhausen, Germany facility for over seven decades. The company specializes in high-performance gliders and has developed multiple aircraft for FAI competition classes. The ASG-32EL represents Schleicher's first venture into electric propulsion, establishing the foundation for subsequent electric models including the AS-35.
Under CEO Peter Kremer's leadership, who personally participated in the original ASG-32's first flight alongside designer Michael Greiner, the company has maintained its position as a leading sailplane manufacturer while pioneering sustainable aviation technologies.
Design Philosophy and Performance
Greiner conceived the ASG-32 series to bridge the gap between Schleicher's ASK-21 trainer and the larger ASH-30 Open Class two-seater, while meeting FAI 20-meter Two-Seater Class requirements. The resulting aircraft features composite construction with a distinctive T-tail configuration and retractable landing gear.
The ASG-32EL maintains the exceptional soaring characteristics of its unpowered sibling, achieving a glide ratio of 52:1 and minimum sink rate of 0.6 meters per second. With a 20-meter wingspan and wing area of 15.7 square meters, the aircraft demonstrates an aspect ratio of 25.47. Maximum takeoff weight reaches 850 kilograms, accommodating two pilots up to 120 kilograms each in a cockpit measuring 0.73 meters in width.
Operational Capabilities
Pilots appreciate the ASG-32EL's versatility in eliminating dependence on traditional tow launches or thermal conditions for initial climb performance. The electric motor enables pilots to gain altitude on demand, extending flight opportunities and reducing operational constraints. Maximum speed reaches 180 km/h with the propeller extended, while never-exceed speed is rated at 270 km/h.
The aircraft's load factors of +5.3/-2.65 G provide confidence for competitive soaring and training applications. The cockpit accommodates both instruction and competition flying, serving gliding clubs and private pilots participating in FAI Two-Seater Class competitions.
Production and Certification
Production of the ASG-32 series commenced in late 2014, with deliveries beginning in 2015. The European Aviation Safety Agency issued Type Certificate approval for the ASG-32 and motorized ASG-32 Mi variants on February 11, 2016. All aircraft continue to be manufactured at Schleicher's original Poppenhausen facility.
While exact production numbers remain undisclosed, a production list exists documenting individual aircraft deliveries. Known examples include registration OK-2033, an ASG-32 Mi variant that has gained recognition in aviation media coverage.
Legacy and Future Impact
The ASG-32EL's significance extends beyond its immediate capabilities, establishing electric propulsion as a viable technology for production sailplanes. This pioneering achievement has influenced subsequent electric aircraft development and demonstrated practical applications for battery-powered aviation in the soaring community.
As production continues today, the ASG-32EL represents both current innovation and future potential, bridging traditional soaring techniques with sustainable propulsion technology. Its success has positioned Alexander Schleicher at the forefront of electric aviation development while maintaining the company's reputation for high-performance competition sailplanes.