Samiksha Jaiswal (Editor)

ABC Gnat

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Manufacturer
  
ABC Motors

ABC Gnat jnpassieuxfreefrimagesABCGnat2jpg

The ABC Gnat was a 45 hp (34 kW) two-cylinder aero engine designed by the noted British engineer Granville Bradshaw for use in light aircraft. The Gnat was built by ABC Motors, first running in 1916, production ceased in December 1918. 17 engines were built from an original order of 18.

Contents

Applications

  • BAT Crow
  • Blackburn Sidecar
  • Eastchurch Kitten
  • Grain Kitten
  • Macchi M.16G
  • Sopwith Sparrow
  • Sopwith Tadpole

    • Specifications (Gnat I)

    Data from Lumsden

    General characteristics

  • Type: 2-cylinder air-cooled flat-twin
  • Bore: 4.33 in (110 mm)
  • Stroke: 4.72 in (120 mm)
  • Displacement: 139.06 cu in (2.28 L)
  • Dry weight: 115 lb (52 kg)

    • Components

  • Valvetrain: Overhead valve, two valves per cylinder
  • Fuel system: Single A.B.C. carburettor
  • Fuel type: Petrol (40-50 Octane rating)
  • Cooling system: Air-cooled

    • Performance

  • Power output: 45 hp (34 kW) at 1,920 rpm (takeoff power)
  • Specific power: 0.32 hp/cu in (14.9 kW/L)
  • Compression ratio: 3.8:1
  • Power-to-weight ratio: 0.4 hp/lb (0.6 kW/kg)

    • References

    ABC Gnat Wikipedia
    (Text) CC BY-SA


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