The Emrax 207 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 April 2018 the engine was no longer advertised on the company website and seems to be out of production.^[2]

Design and development

The Emrax 207 is a brushless design producing 70 kW (94 hp), with an outrunner coil. 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]

Specifications (Emrax 207)

Data from Tacke^[1]

General characteristics

• Type: Brushless electric aircraft engine
• Length: 85 mm (3.3 in)
• Diameter: 207 mm (8.1 in)
• Dry weight: 9 kg (19.8 lb)

Components

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

Performance

• Power output: 70 kW (94 hp)
• Power-to-weight ratio: 7.8 kW/kg