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The Emrax 228 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]

Emrax 228
Type Electric aircraft engine
National origin Slovenia
Manufacturer Emrax

Design and developmentEdit

The Emrax 228 is a brushless 250 volt design producing a peak of 230 kW (308 hp), 100 kW (134 hp) continuous, with an outrunner coil. It has a 98% 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][2]

Specifications (Emrax 268)Edit

Data from Tacke and manufacturer[1][2]

General characteristics

  • Type: Brushless electric aircraft engine
  • Length: 91 mm (3.6 in)
  • Diameter: 268 mm (10.6 in)
  • Dry weight: 19.9 kg (43.9 lb)



  • Power output: 230 kW (308 hp) peak, 100 kW (134 hp) continuous
  • Voltage: 250 V nominal
  • Best efficiency: 98%
  • Power-to-weight ratio: 11.6 kW/kg

See alsoEdit


  1. ^ a b c Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 262–263. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  2. ^ a b Emrax. "Emrax 268". Retrieved 29 April 2018.

External linksEdit