title: Green E.6
text: # Green E.6
  
  The Green E.6 was a British six-cylinder, water-cooled aero engine that first ran in 1911, it was designed by Gustavus Green and built by the Green Engine Co and Mirlees, Bickerton & Day of Stockport between August 1914 and December 1918.
  
  ## Applications
  
  * Avro 504K
  * Avro 523A
  * Bass-Paterson flying boat
  * Cody Type V
  * Eastbourne Aviation Circuit biplane
  * Gnosspelius Hydro Tractor Biplane
  * Grahame-White Type X Charabanc
  * Royal Aircraft Factory F.E.2a
  * Short S.68 Seaplane
  * Sopwith Bat Boat
  * Sopwith Three-seater
  * Sopwith 1913 Circuit of Britain floatplane
  * Sopwith Type TT
  
  ## Engines on display
  
  A preserved Green E.6 engine is on public display at the Fleet Air Arm Museum, RNAS Yeovilton.
  
  ## Specifications (E.6)
  
  Data from Lumsden
  
  ### General characteristics
  
  * Type: 6-cylinder, inline, upright piston engine
  * Bore: 5.51 in (140 mm)
  * Stroke: 5.98 in (152 mm)
  * Displacement: 855.54 cu in (14.03 L)
  * Dry weight: 440 lb (200 kg)
  
  ### Components
  
  * Valvetrain: Gear driven overhead camshaft, two valves per cylinder
  * Fuel type: 40-50 octane petrol
  * Cooling system: Water-cooled
  * Reduction gear: Direct drive, right-hand tractor
  
  ### Performance
  
  * Power output: 120 hp (89.5 kW) at 1,300 rpm (maximum power)
  * Specific power: 0.14 hp/cu in (6.4 kW/L)
  * Power-to-weight ratio: 0.27 hp/lb (0.45 kW/kg)
  