The Haacke HFM-2 was a German two cylinder flat engine built in the early 1920s.[1]

HFM-2
HFM-2a on display at the Finnish Airforce Museum
Type Flat-twin aero engine
National origin Germany
Manufacturer Haacke Motorenbau, Johannisthal (Berlin)

Variants

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From Flight[2]

  • HFM-2 (22 kW (30 hp))
  • HFM-2a (22–26 kW (30–35 hp)); as HFM-2 apart from 120 mm (4.72 in) bore

Applications

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Engines on display

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Specifications (HFM-2)

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Data from Flight[2]

General characteristics

  • Type: Four-stroke horizontally opposed twin cylinder
  • Bore: 112 mm (4.4 in)
  • Stroke: 140 mm (5.5 in)
  • Dry weight: 60 kg (132 lb)

Components

  • Valvetrain: Overhead valve
  • Oil system: Camshaft-operated twin plunger pumps
  • Cooling system: Air-cooled

Performance

  • Power output: 22 kW (30 hp) at 1,300 rpm

See also

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Comparable engines

Related lists

References

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  1. ^ "Aerodromas » History". aleksotasair.lt. Archived from the original on 2017-02-24. Retrieved 2017-02-23.
  2. ^ a b "The Haacke 30 hp aero engine". flightglobal.com. Retrieved 2017-02-23.
  3. ^ "The German exhibits". Flight. Vol. XV, no. 24. 12 June 1924. pp. 384–5.
  4. ^ "The Dietrich-Gobiet Sport Monoplane". Flight. Vol. XVI, no. 21. 22 May 1924. pp. 286–7.
  5. ^ Cynk, Jerzy (1971). Polish Aircraft 1893-1939. London: Putnam Publishing. p. 601. ISBN 0-370-00085-4.
  6. ^ Serryer, J (13 March 1924). "Les avions Dobkevicius". Les Ailes (143): 2–3.
  7. ^ Cynk, Jerzy (1971). Polish Aircraft 1893-1939. London: Putnam Publishing. pp. 584–6. ISBN 0-370-00085-4.
  8. ^ "Mayenbergen amphibian". Retrieved 26 February 2017.
  9. ^ a b "Rieseler I and II". Archived from the original on 26 October 2021. Retrieved 26 February 2017.
  10. ^ "Rieseler III". Retrieved 26 February 2017.
  11. ^ Cynk, Jerzy (1971). Polish Aircraft 1893-1939. London: Putnam Publishing. pp. 552–3. ISBN 0-370-00085-4.
  12. ^ Cynk, Jerzy (1971). Polish Aircraft 1893-1939. London: Putnam Publishing. pp. 594–5. ISBN 0-370-00085-4.
  13. ^ "Udet U.1". Archived from the original on 15 October 2022. Retrieved 26 February 2017.
  14. ^ "The Udet Sporting Two-seater". Flight. XV (10): 122.