title: Walter Scolar
text: # Walter Scolar
  
  The Walter Scolar was a Czechoslovakian nine-cylinder, air-cooled radial engine for powering light aircraft that first ran in 1936. With a displacement of 8 litres (490 cu in), it produced 132 kW (180 hp) at 2,500 rpm.
  
  ## Applications
  
  * Beneš-Mráz Beta-Scolar
  
  ## Engines on display
  
  Preserved examples of the Walter Skolar engine are on display at the following museums:
  
  * Muzeum Letectva, Košice
  * Prague Aviation Museum, Kbely
  
  ## Specifications (Scolar)
  
  Data from Kosice Air Museum
  
  ### General characteristics
  
  * Type: 9-cylinder radial piston engine
  * Bore: 105 mm (4.13 in)
  * Stroke: 100 mm (3.94 in)
  * Displacement: 7.8 L (488 cu in)
  * Dry weight: 155 kg (342 lb)
  
  ### Components
  
  * Valvetrain: One intake and one exhaust valve per cylinder
  * Fuel system: Carburettor
  * Fuel type: Petrol
  * Cooling system: Air-cooled
  
  ### Performance
  
  * Power output: 132 kW (180 hp) at 2,500 rpm
  * Compression ratio: 5.4:1
  * Power-to-weight ratio: 0.85 kW/kg (0.52 hp/lb)
  