NST BS 650

The NST BS 650 is a German aircraft engine that was designed and produced by NST-Machinenbau of Niedergörsdorf for use in ultralight aircraft.^[1]

BS 650
Type	Aircraft engine
National origin	Germany
Manufacturer	NST-Machinenbau

By March 2018 the engine was no longer advertised on the company website and seems to be out of production.^[2]

Design and development

The BS 650 is a twin-cylinder four-stroke, Vee configuration, 630 cc (38.4 cu in) displacement, air-cooled, petrol engine design, with a poly V belt reduction drive with a reduction ratio of 2.7:1. It employs dual magnetos and produces 35 hp (26 kW) at 4200 rpm, with a compression ratio of 9.0:1.^[1]

Specifications (BS 650)

Data from Tacke^[1]

General characteristics

• Type: V-twin cylinder, four stroke aircraft engine
• Bore: 76 mm (3.0 in)
• Stroke: 70 mm (2.8 in)
• Displacement: 630 cc (38.4 cu in)
• Length: 400 mm (15.7 in)
• Width: 3,600 mm (141.7 in)
• Height: 280 mm (11.0 in)
• Dry weight: 33 kg (72.8 lb)

Components

• Fuel type: petrol
• Cooling system: air
• Reduction gear: poly V belt

Performance

• Power output: 35 hp (26 kW)

See also

Related lists

• List of aircraft engines