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| MBB Bo 108 | |
|---|---|
| Name | Bo 108 |
| Type | Light helicopter / experimental rotorcraft |
| Manufacturer | Messerschmitt-Bölkow-Blohm |
| First flight | 1978 |
| Status | Prototype / basis for production |
MBB Bo 108
The Bo 108 was an experimental light helicopter developed by Messerschmitt-Bölkow-Blohm during the 1970s that led to the production Eurocopter (now Airbus Helicopters) BO-series. It combined new composited materials, hingeless rotor concepts, and turbine powerplant installation that influenced later designs such as the Eurocopter EC135, Airbus Helicopters H145, Eurocopter EC120 and informed rotorcraft engineering practiced at institutions like the German Aerospace Center. The program intersected with developments in European aerospace consolidation exemplified by mergers involving Messerschmitt-Bölkow, Blohm+Voss, Sikorsky Aircraft, and later Airbus Group.
The Bo 108 emerged amid the 1970s European rotorcraft modernization programs pursued by Messerschmitt-Bölkow-Blohm and contemporaneous projects like the Westland Lynx, Bell 206, Aérospatiale Gazelle, and experimental work at NASA centers. Design impetus drew from collaborations between design teams at Hamburg Aeronautical Studios, engineering groups formerly of Messerschmitt AG, and suppliers including Rolls-Royce plc and Allison Engine Company. Prototype construction used composite manufacturing methods promoted by research programs at the European Space Agency and testing regimes coordinated with the German Federal Ministry of Defence and civil aviation authorities such as the Luftfahrt-Bundesamt.
The Bo 108 utilized a hingeless main rotor derived from research into elastic rotor theory promulgated by universities like the Technical University of Berlin and RWTH Aachen University. Its airframe incorporated materials and structural approaches paralleled in projects at Daimler-Benz Aerospace and influenced by composites work at Boeing Research & Technology-Europe. Powerplant selection and integration reflected engine markets dominated by firms such as Turbomeca, Pratt & Whitney Canada, and Allison, with transmission concepts comparable to those on the AgustaWestland AW109 and Sikorsky S-76. Avionics suites tested in the Bo 108 program drew on avionics suppliers like Honeywell, Thales Group, and Rockwell Collins and concepts proven in helicopters such as the Bell 412 and Mil Mi-8.
The Bo 108 program produced prototype airframes and testbeds that spawned derivative configurations used in flight trials and systems validation similar to pathways taken by the Agusta A109 and Eurocopter AS365 Dauphin families. Proposed variants explored cabin layouts comparable to those in the Bell 429 and utility adaptations akin to the Sikorsky S-70 series. Specialized test versions incorporated mission equipment suites inspired by conversions seen on the Westland Wessex and AgustaWestland AW139 for roles including training, law enforcement, and emergency medical services, paralleling conversions executed by operators such as London Air Ambulance and Bavarian State Police.
Operational testing for the Bo 108 occurred at German flight test centers and military proving grounds that hosted programs like the Panavia Tornado trials and civil evaluation activities similar to those for the Eurofighter Typhoon. Flight evaluation referenced certification processes administered by authorities like the European Union Aviation Safety Agency and design reviews conducted in collaboration with firms including DaimlerChrysler Aerospace and later EADS. Lessons from Bo 108 trials contributed directly to the certification and service introduction of successor models used by organizations such as the Royal Air Force, German Air Force, French Gendarmerie, and various corporate and emergency services fleets.
- Crew: 1–2 (test variations) influenced by configurations of the Eurocopter EC135 and Bell 206 - Capacity: typically 4 passengers in development layouts akin to the Agusta A109 - Powerplant: single turboshaft options evaluated from Turbomeca and Allison Engine Company families, comparable to installations on the Bell 407 and Sikorsky S-76 - Rotor system: hingeless/elastic main rotor informed by research from Technical University of Munich and examples like the Westland Lynx - Avionics: experimental suites by Thales Group, Honeywell, and Rockwell Collins
- Prototype and test operation by Messerschmitt-Bölkow-Blohm flight test units - Evaluation flights conducted at German Aerospace Center facilities - Data and trials shared with certification authorities such as the European Union Aviation Safety Agency and national agencies including the Luftfahrt-Bundesamt
Category:Helicopters Category:Experimental aircraft