title: Salmson AD.3
text: # Salmson AD.3
  
  The Salmson AD.3 or Salmson 3 Ad was a French designed, three-cylinder, air-cooled radial aero engine. It was also produced by British Salmson in Great Britain during the 1920s.
  
  ## Applications (3 Ad)
  
  * Adaridi AD 3
  * Farman Aviette
  * Peyret-Nessler Libellule
  
  ## Engines on display
  
  A preserved Salmson 3 Ad engine is on public display at the Deutsches Museum, Munich.
  
  ## Specifications (AD.3)
  
  Data from Flight, 21 February 1924.
  
  ### General characteristics
  
  * Type: Three-cylinder, single-row, water-cooled radial engine
  * Bore: 70 mm (2.75 in)
  * Stroke: 86 mm (3.4 in)
  * Displacement: 0.993 L (60.6 cu in)
  * Length: 650 mm (25.6 in)
  * Diameter: 550 mm (21.6 in)
  * Dry weight: 34 kg (75 lb)
  
  ### Components
  
  * Valvetrain: Two overhead valves per cylinder, pushrod operated
  * Fuel system: Claudel carburettor
  * Oil system: Pressure lubrication
  * Cooling system: Air-cooled
  * Reduction gear: Direct drive
  
  ### Performance
  
  * Power output: 12 kW (16 hp) at 2,400 rpm
  * Compression ratio: 5.5.:1
  * Specific fuel consumption: 250 g (0.55 lb) per horsepower-hour
  * Oil consumption: 15 g (0.33 lb) per horsepower hour
  * Power-to-weight ratio: 0.35 kW/kg (0.21 hp/lb)
  