Emrax 2

Emrax 2
Type	Electric aircraft engine
National origin	Slovenia
Manufacturer	Emrax

The Emrax 2 is a Slovenian electric motor for powering electric aircraft and other applications, designed and produced by Emrax d.o.o of Kamnik. The company was formerly called Enstroj and based in Radomlje.^[1]

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

Design and development

The Emrax 2 is a brushless 200 Volt design, producing 30 to 35 kW (40 to 47 hp), with an outrunner coil. It has a 94% efficiency. The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for a reduction drive.^[1]

Variants

Emrax 2 AC: Air-cooled version, producing 30 kW (40 hp) at 3000 rpm.^[1]
Emrax 2 LC: Liquid-cooled version, producing 35 kW (47 hp) at 3000 rpm.^[1]

Specifications (Emrax 2 AC)

Data from Bayerl^[1]

General characteristics

Type: Brushless electric aircraft engine
Length: 86 mm (3.4 in)
Diameter: 225 mm (8.9 in)
Dry weight: 11.8 kg (26.0 lb)

Components

Coil type: Outrunner
Cooling system: air
Reduction gear: none

Performance

Power output: 30 kW (40 hp) at 3000 rpm
Voltage: 200V
Power-to-weight ratio: 7.8 kW/kg

References

^ ^a ^b ^c ^d ^e Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 242-243. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
^ Emrax. "EMRAX". emrax.com. Retrieved 2 May 2018.

[WDLA11-1] Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 242-243. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X

[2] Emrax. "EMRAX". emrax.com. Retrieved 2 May 2018.

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