title: Lange EA 42
text: # Lange EA 42
  
  The Lange EA 42 is an electrical aero engine designed for self launching gliders. It is produced in Germany by Lange Aviation for their Antares 20E glider.
  
  ## Development
  
  The EA 42 combines an EM 42 brushless 42 kW electric external rotor motor with a related engine control system and power electronics. The motor drives a two-bladed composite fixed pitch propeller with a diameter of 2 m (7 ft). It is powered by a battery pack.
  
  ## Applications
  
  * Lange Antares 20E
  * Lange Antares 23E
  * Schempp-Hirth Arcus E
  
  ## Specifications (EA 42)
  
  ### EM42 electrical engine
  
  Data from TCDS
  
  ### General characteristics
  
  * Type: Brushless electric aircraft engine
  * Length: 272 mm (10.7 in)
  * Diameter: 250 mm (9.8 in)
  * Dry weight: 29.12 kg (64.2 lb)
  
  ### Components
  
  * Coil type: Outrunner
  * Cooling system: air
  * Reduction gear: none
  
  ### Performance
  
  * Power output: 38.5 kW (52 hp)
  * Voltage: V nominal
  * Power-to-weight ratio: 1.3 kW/kg
  
  ### LE 42 power electronics
  
  * Length: 422 mm (16.6 in)
  * Width: 169 mm (6.7 in)
  * Height: 208 mm (8.2 in)
  * Mass: 9.58 kg (21.12 lb)
  