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Walter Bora

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Walter Bora

The Walter Bora was a Czechoslovakian nine-cylinder, air-cooled radial engine for powering light aircraft that was developed in the 1930s.

Contents

Variants

Bora II
Direct drive engine
Bora II-R
Geared engine, reduction ratio 0.666:1

Applications

  • Aero A.200
  • Nardi FN.305
  • RWD-9
  • SIAI-Marchetti SM.101

    • Engines on display

    A preserved example of the Walter Bora engine is on display at the following museum:

  • Prague Aviation Museum, Kbely

    • Specifications (Bora II-R)

    Data from Flight

    General characteristics

  • Type: 9-cylinder radial piston engine
  • Bore: 105 mm (4.1 in)
  • Stroke: 120 mm (4.7 in)
  • Dry weight: 172 kg (379 lb)

    • Components

  • Valvetrain: One intake and one exhaust valve per cylinder
  • Fuel system: Carburettor
  • Fuel type: Petrol
  • Cooling system: Air-cooled

    • Performance

  • Power output: 183 kW (245 hp) at 2,400 rpm
  • Compression ratio: 6.3:1
  • Power-to-weight ratio: 1 kW/kg (0.65 hp/lb)

    • References

    Walter Bora Wikipedia
    (Text) CC BY-SA


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