title: Walter Regulus
text: # Walter Regulus
  
  The Walter Regulus was a Czechoslovakian five-cylinder, air-cooled radial engine for powering light aircraft that first ran in 1934. The engine produced 186 kW (250 hp).
  
  ## Engines on display
  
  A preserved example of the Walter Regulus engine is on display at the following museum:
  
  * Prague Aviation Museum, Kbely
  
  ## Specifications (Regulus)
  
  Data from Jane's all the World's Aircraft 1931
  
  ### General characteristics
  
  * Type: 5-cylinder radial piston engine
  * Bore: 135 mm (5.3 in)
  * Stroke: 160 mm (6.3 in)
  * Displacement: 11.45 L (699 cu in)
  * Length: 1,104 mm (43.5 in)
  * Diameter: 1,185 mm (46.7 in)
  * Dry weight: 191 kg (421 lb)
  
  ### Components
  
  * Valvetrain: One intake and one exhaust valve per cylinder operated by pushrods and rockers
  * Fuel system: One Zenith double 50DCJ carburettor
  * Fuel type: Benzine / Benzol 50:50
  * Oil system: dry sump, pressure system
  * Cooling system: Air-cooled
  
  ### Performance
  
  * Power output: Normal:138 kW (185 hp) at 1,800 rpm; Maximum 170 kW (230 hp)
  * Compression ratio: 5.7:1
  * Specific fuel consumption: 0.282 kg/kWh (0.464 lb/(hp⋅h))
  * Oil consumption: 0.013 kg/kWh (0.022 lb/(hp⋅h))
  