title: Sauer S 2500
text: # Sauer S 2500
  
  The Sauer S 2500 is a family of four stroke aircraft engines certified according to JAR 22-H (CS-22 subpart H)
  
  ## Design and development
  
  The engine is based on the Wasserboxer, extensively modified for aircraft use and all the parts are custom made. They are certified according to CS-22 subpart H and can therefore be used in motorgliders and light aircraft that are certified as CS-VLA and CS-LSA
  
  ## Variants
  
  ### Sauer S 2500 T
  
      A 126 hp (94 kW) turbocharged version no longer available and unknown if it ever was available commercially.
  
  ## Specifications
  
  ### General characteristics
  
  * Bore: 97mm
  * Stroke: 84mm
  * Displacement: 2483cc
  * Dry weight: 77 kg
  
  ### Components
  
  * Valvetrain: Single overhead exhaust valve, single overhead inlet valve per cylinder
  * Fuel system: Bing carburetor with altitude compensation
  * Fuel type: min 98 RON
  * Cooling system: Air-cooled
  
  ### Performance
  
  * Power output: 94hp at 3000 rpm, 100hp at 3200 rpm (S 2500-1-FS1)
  * Compression ratio: 8.8:1
  