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AE50R
Type	Aircraft engine
National origin	Austria
Manufacturer	Austro Engine
Major applications	Schiebel Camcopter S-100; Schleicher ASH 30; Schleicher ASH 31
Number built	over 700

The Austro Engine AE50R is an Austrian aircraft engine, produced by Austro Engine of Wiener Neustadt for use in motorgliders and UAVs.^[2]^[3]

Design and development

The AE50R is based on the MidWest AE50. Diamond Aircraft Industries purchased the design from Mid-West Engines Limited on 10 March 2003 and took over as the type certificate holder. Diamond formed its subsidiary, Austro Engine, to produce the engine.^[4]

The engine is a single rotor four-stroke, air and liquid-cooled, 294 cc (17.9 cu in) gasoline Wankel engine design, with a mechanical gearbox reduction drive employing a helical gear set with a reduction ratio of 3.225:1. Cooling is predominantly liquid, with forced air cooling for the rotor core. A starter and generator are standard equipment. It employs dual capacitor discharge ignition with variable ignition timing and produces 55 hp (41 kW) at 7750 rpm.^[1]^[2]^[3]^[4]

The engine was originally type certified by Mid-West on 18 Dec 1992 to JAR-22 H, Change 4, dated 13 September 1982, incl. Orange Paper 22/90/1. It was transferred to an EASA Type Certificate under EASA Part 22 Subpart H on 4 April 2011.^[1]^[4]

Variants

AE50R: Base version, equipped with a conventional dual ignition system and a carburettor, certified 18 December 1992^[4]
AE50RA: Version equipped with a conventional dual ignition system and a carburettor, with differing engine attachment point geometry, certified 26 September 2001^[4]
AE50RAB: Version equipped with a conventional dual ignition system and a carburettor, with differing engine attachment point geometry, certified 26 September 2001^[4]
IAE50R-AA: Version equipped with electronic dual ignition system and fuel injection system, with differing engine attachment point geometry, with a narrower width of 339 mm (13.3 in), certified 26 September 2001^[4]

Applications

Specifications (AE50R)

Data from World Directory of Leisure Aviation 2011-12^[2]

General characteristics

Type: Single rotor, four-stroke Wankel aircraft engine
Displacement: 294 cc (17.9 cu in)
Length: 585 mm (23.0 in)
Width: 310 mm (12.2 in)
Height: 300 mm (11.8 in)
Dry weight: 27.8 kg (61.3 lb)

Components

Fuel type: Avgas 100LL or RON 95 Unleaded
Cooling system: liquid (50% glycol, water) and forced air cooling for rotor core
Reduction gear: mechanical gearbox helical gear reduction drive, a reduction ratio of 3.225:1

Performance

Power output: 55 hp (41 kW) at 7750 rpm
Compression ratio: 9:1
Power-to-weight ratio: 0.9 hp/lb (1.48 kW/kg)

References

^ ^a ^b ^c Austro Engine (2010). "AE50R" (PDF). austroengine.at. Archived from the original (PDF) on 28 November 2016. Retrieved 8 July 2015.
^ ^a ^b ^c Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, pages 238-239. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
^ ^a ^b Austro Engine. "Products". austroengine.at. Retrieved 8 July 2015.
^ ^a ^b ^c ^d ^e ^f ^g European Aviation Safety Agency (4 April 2011). "EASA.E.085" (PDF). easa.europa.eu. Retrieved 8 July 2015.