Haacke HFM-2
{{short description|German aircraft engine from the 1920s}}
| {{Infobox Aircraft Begin
|name = HFM-2 |image = File:Haacke HFM-2a Keski-Suomen ilmailumuseo.jpg |caption = HFM-2a on display at the Finnish Airforce Museum }}{{Infobox Aircraft Engine |type = Flat-twin aero engine |national origin = Germany |manufacturer = Haacke Motorenbau, Johannisthal (Berlin) |designer = |first run = |major applications = |produced = |number built = |program cost = |unit cost = |developed from = |variants with their own articles = }} |
The Haacke HFM-2 was a German two cylinder flat engine built in the early 1920s.{{Cite web|url=http://aleksotasair.lt/en/history/|title=Aerodromas » History|website=aleksotasair.lt|access-date=2017-02-23|archive-date=2017-02-24|archive-url=https://web.archive.org/web/20170224053633/http://aleksotasair.lt/en/history/|url-status=dead}}
Variants
- HFM-2 ({{convert|22|kW|hp|abbr=on}})
- HFM-2a ({{convert|30-35|hp|kW|abbr=on|order=flip}}); as HFM-2 apart from {{convert|120|mm|in|abbr=on|2}} bore
Applications
- Albatros L.66{{cite magazine |date=12 June 1924|title= The German exhibits|magazine= Flight|volume=XV |issue=24 |pages=384–5 |url= http://www.flightglobal.com/pdfarchive/view/1924/1924%20-%200384.html}}
- Dietrich-Gobiet DP.VII{{cite magazine |date=22 May 1924 |title= The Dietrich-Gobiet Sport Monoplane|magazine= Flight|volume=XVI |issue=21 |pages=286–7 |url= http://www.flightglobal.com/pdfarchive/view/1924/1924%20-%200286.html }}
- Działowski D.K.D.1{{cite book|title=Polish Aircraft 1893-1939|last=Cynk|first=Jerzy|year=1971|publisher=Putnam Publishing|location=London|isbn=0-370-00085-4|page=[https://archive.org/details/polishaircraft1800cynk/page/601 601]|url=https://archive.org/details/polishaircraft1800cynk/page/601}}
- Dobi-I{{cite journal |last=Serryer |first=J |date=13 March 1924 |title=Les avions Dobkevicius|journal=Les Ailes|issue=143|pages=2–3 |url=http://gallica.bnf.fr/ark:/12148/bpt6k6556089d/f2 }}
- Gabriel P 5{{cite book|title=Polish Aircraft 1893-1939|last=Cynk|first=Jerzy|year=1971|publisher=Putnam Publishing|location=London|isbn=0-370-00085-4|pages=[https://archive.org/details/polishaircraft1800cynk/page/584 584–6]|url=https://archive.org/details/polishaircraft1800cynk/page/584}}
- Karhu 3
- Mayenberger amphibian{{cite web |url=http://aviadejavu.ru/Site/Crafts/Craft33326.htm|title=Mayenbergen amphibian|accessdate=26 February 2017}}
- Rieseler R.I{{cite web|url=http://www.histaviation.com/Rieseler_I_and_II.html|title=Rieseler I and II|accessdate=26 February 2017|archive-date=26 October 2021|archive-url=https://web.archive.org/web/20211026111004/http://www.histaviation.com/Rieseler_I_and_II.html|url-status=dead}}
- Rieseler R.II
- Rieseler R.III{{cite web |url=http://arlandaflygsamlingar.se/flygplan/1-4-s-aar-rieseler-riii|title=Rieseler III|accessdate=26 February 2017}}
- Silesia S-3{{cite book|title=Polish Aircraft 1893-1939|last=Cynk|first=Jerzy|year=1971|publisher=Putnam Publishing|location=London|isbn=0-370-00085-4|pages=[https://archive.org/details/polishaircraft1800cynk/page/552 552–3]|url=https://archive.org/details/polishaircraft1800cynk/page/552}}
- Silesia S-4{{cite book|title=Polish Aircraft 1893-1939|last=Cynk|first=Jerzy|year=1971|publisher=Putnam Publishing|location=London|isbn=0-370-00085-4|pages=[https://archive.org/details/polishaircraft1800cynk/page/594 594–5]|url=https://archive.org/details/polishaircraft1800cynk/page/594}}
- Udet U.1{{cite web|url=http://www.histaviation.com/Udet_U_1.html|title=Udet U.1|accessdate=26 February 2017|archive-date=15 October 2022|archive-url=https://web.archive.org/web/20221015002651/https://histaviation.com/Udet_U_1.html|url-status=dead}}
- Udet U.2{{cite journal |title=The Udet Sporting Two-seater|journal= Flight|volume=XV |issue=10 |pages=122 |url= https://www.flightglobal.com/pdfarchive/view/1923/1923%20-%200129.html }}
Engines on display
Specifications (HFM-2)
{{pistonspecs|
|type=Four-stroke horizontally opposed twin cylinder
|bore=112 mm (4.4 in)
|stroke=140 mm (5.5 in)
|displacement=
|length=
|diameter=
|width=
|height=
|weight=60 kg (132 lb)
|valvetrain=Overhead valve
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=
|oilsystem=Camshaft-operated twin plunger pumps
|coolingsystem=Air-cooled
|power={{convert|22|kW|hp|abbr=on}} at 1,300 rpm
|specpower=
|compression=
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=
|general_other=
|components_other=
|performance_other=
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}