The FLUGWAG Bremen ESS 641 was a 1970s German glider-towing monoplane designed and built by the Flugwissenschaftliche Arbeitsgemeinschaft Bremen research organisation.^[1]

Design and development

The ESS 641 is a low-wing cantilever monoplane with a fixed tail-wheel landing gear.^[1] Powered by a 180 hp (134 kW) Avco Lycoming O-360 flat-four piston engine.^[1] The pilot had an enclosed cockpit with a transparent canopy.^[1]

Specifications

Data from The Illustrated Encyclopedia of Aircraft^[1]

General characteristics

• Crew: 1
• Length: 23 ft 11.5 in (7.30 m)
• Wingspan: 34 ft 5.5 in (10.50 m)
• Height: 7 ft 4.5 in (2.25 m)
• Wing area: 177.61 sq ft (16.50 m²)
• Empty weight: 1,221 lb (554 kg)
• Gross weight: 1,543 lb (700 kg)
• Powerplant: 1 × Avco Lycoming O-360-A3A flat-four piston engine , 180 hp (134 kW)

Performance

• Maximum speed: 124 mph (200 km/h, 108 kn)