Cors-Air M25Y Black Devil

The Cors-Air M25Y Black Devil is an Italian aircraft engine, designed and produced by Cors-Air of Barco di Bibbiano for use in powered parachutes and very small ultralight trikes flown by heavy pilots.[1]

M25Y Black Devil
Type Aircraft engine
National origin Italy
Manufacturer Cors-Air srl

Design and development

The M25Y is a single-cylinder two-stroke, 173 cc (10.6 cu in) displacement, air-cooled, petrol engine design, with a poly V belt reduction drive. The reduction drive has optional reduction ratios of 2.2:1, 2.3:1, 2.5:1, 2.6:1, 2.7:1 and 2.88:1. The M25Y employs a single capacitor discharge ignition, a WB37 diaphragm carburettor and produces 21 hp (16 kW) at 7900 rpm. The weight is 14.4 kg (31.7 lb) including the exhaust system.[1][2]

The engine has a centrifugal clutch that stops the propeller spinning when the engine is operated at low RPM, a safety feature for use in powered paraglider applications.[2]

Applications

Specifications (M25Y Black Devil)

Data from Tacke[1]

General characteristics
  • Type: Single-cylinder, two stroke aircraft engine
  • Bore: 65 mm (2.6 in)
  • Stroke: 52 mm (2.0 in)
  • Displacement: 173 cc (10.6 cu in)
  • Length: 240 mm (9.4 in)
  • Width: 250 mm (9.8 in)
  • Height: 330 mm (13.0 in)
  • Dry weight: 14.4 kg (31.7 lb) including the exhaust system

Components
  • Fuel system: WB37 diaphragm carburettor
  • Fuel type: petrol
  • Cooling system: air

Performance

See also

Related lists

References
  1. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 256-257. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  2. Cors-Air srl. "Black Devil Light – Clutch". www.corsairmotors.com. Retrieved 16 January 2018.
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