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)[1][2]

Sauer S 2500
Type Horizontally opposed piston aircraft engine
National origin Germany
Manufacturer Sauer Flugmotorenbau GmbH
Major applications Motorgliders and light aircraft
Unit cost From €18,465.00 in 2014
Developed from Wasserboxer

Design and development

The engine is based on the Wasserboxer, extensively modified for aircraft use and all the parts are custom made.[1] They are certified according to CS-22 subpart H[2][3] and can therefore be used in motorgliders and light aircraft that are certified as CS-VLA[4] and CS-LSA[5]

Variants
Sauer S 2500-1-DS1
Sauer S 2500-1-TS1
Sauer S 2500-1-HS1
Sauer S 2500-1-FS1
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

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
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See also

References
  1. Sauer Flugmotorenbau GmbH
  2. EASA, CS-22
  3. LBA 4580, LBA
  4. CS-VLA, CS-VLA
  5. CS-LSA, CS-LSA
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