Design Philosophy and Development
The Choucas emerged from Claude Noin's vision of creating an accessible yet sophisticated motor glider for amateur builders. Noin, who established Noin Aeronautique in 1976, had already demonstrated his expertise with the single-seat Sirius motorglider, delivering 22 kits primarily within France starting in 1984. The Choucas represented his evolution toward a more social flying experience with its side-by-side seating arrangement.
The aircraft's most distinctive feature is its tailless configuration, a design choice that enhances both gliding efficiency and structural simplicity. The slightly reverse-swept wings provide pilots with unparalleled visibility during flight operations, while the composite fuselage construction offers durability and weather resistance. This hybrid approach combining composite fuselage with traditional wood and fabric wings strikes a balance between modern materials and conventional homebuilding techniques.
The Manufacturer's Legacy
ALPAERO operates as the current manifestation of Claude Noin's aircraft manufacturing enterprise, which began in 1976 under the Noin Aeronautique banner. The company diversified beyond aircraft into motorgliders, boats, and hang gliders, establishing a reputation for innovative recreational vehicle design. Following the success of the Sirius program, Noin expanded his product line to include the Choucas and later the Exel single-seat motorglider.
The transition from Noin Aeronautique to ALPAERO branding reflects the company's continued evolution while maintaining its founder's design philosophy. Based in France, the operation continues offering kit aircraft to the homebuilding community, with the Choucas remaining available as a basic kit for amateur constructors.
Technical Innovation and Construction
The Choucas incorporates several advanced features for a homebuilt aircraft. Its tailless design eliminates the complexity and weight of conventional tail surfaces while providing efficient gliding characteristics essential for motorglider operations. The front-mounted two-stroke engine configuration ensures proper weight distribution and simplified maintenance access.
Production models benefit from carbon-reinforced structures, a critical enhancement allowing compliance with European ultralight regulations under FAI weight limitations. This carbon reinforcement represents a significant advancement over the original prototype, demonstrating ALPAERO's commitment to incorporating modern materials technology.
The dual control system accommodates both experienced pilots and newcomers to motorgliding, making the aircraft suitable for training applications. Controls are accessible from either seat position, enhancing the aircraft's versatility for instruction or recreational flying with passengers.
Operational Characteristics
The Choucas serves primarily as a touring motorglider for private operators throughout Europe. Its side-by-side configuration makes it particularly appealing for recreational flying where communication between occupants is essential. The aircraft's gliding capabilities allow for extended soaring flight when thermals are available, while the engine provides reliable powered flight when needed.
The fast-build fuselage kit philosophy reflects modern homebuilding trends toward reduced construction time without compromising structural integrity. This approach attracts builders who desire the satisfaction of aircraft construction but may lack unlimited time for traditional build methods requiring extensive fabrication work.
Current Status and Recognition
The Choucas holds official recognition with ICAO type designation CHCS, appearing in international aircraft databases under both ALPAERO and NOIN manufacturer listings. This dual recognition reflects the aircraft's transition between company identities while maintaining its established certification status.
While specific production numbers remain undocumented, the aircraft continues availability as a kit product, suggesting sustained market interest among European homebuilders. The design's longevity since its 1995 first flight demonstrates its successful integration of performance, buildability, and operational characteristics.
The Choucas represents a unique niche within the motorglider market, offering builders an alternative to conventional configurations through its tailless design and composite construction techniques. Its continued production reflects the enduring appeal of Claude Noin's design philosophy combining innovation with practical homebuilding considerations.