Haacke HFM-2 - Engine - avia.wikisort.org

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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

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

Albatros L.66[3]
Dietrich-Gobiet DP.VII[4]
Działowski D.K.D.1[5]
Dobi-I[6]
Gabriel P 5[7]
Karhu 3
Mayenberger amphibian[8]
Rieseler R.I[9]
Rieseler R.II[9]
Rieseler R.III[10]
Silesia S-3[11]
Silesia S-4[12]
Udet U.1[13]
Udet U.2[14]

Engines on display

Finnish Airforce Museum

Specifications (HFM-2)

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

References

Wikimedia Commons has media related to Haacke HFM 2.

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

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