Walter Polaris
{{short description|1930s Czech piston aircraft engine}}
| {{Infobox Aircraft Begin
|name= Polaris |image = Letecké muzeum Kbely (72).jpg |caption = Walter Polaris }} {{Infobox Aircraft Engine |type= Radial aero engine |national origin = Czechoslovakia |manufacturer= Walter Aircraft Engines |first run= |major applications= |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The Walter Polaris was a Czechoslovakian three-cylinder, air-cooled radial engine for powering light aircraft that was developed in the 1930s.Gunston 1989, p. 174.
Applications
Engines on display
A preserved example of the Walter Polaris engine is on display at the following museum:
Specifications (Polaris)
{{pistonspecs
|
|ref=
|type=3-cylinder radial piston engine
|bore={{convert|105|mm|in|2|abbr=on}}
|stroke={{convert|120|mm|in|2|abbr=on}}
|displacement={{convert|3.12|L|cuin|abbr=on}}
|length={{convert|708|mm|in|1|abbr=on}}
|diameter={{convert|926|mm|in|1|abbr=on}}
|width=
|height=
|weight={{convert|72|kg|lb|abbr=on}}
|valvetrain=One intake and one exhaust valve per cylinder
|supercharger=
|turbocharger=
|fuelsystem=Carburettor
|fueltype=Petrol
|oilsystem=
|coolingsystem=Air-cooled
|power= {{convert|44|kW|hp|abbr=on}} at 1,900 rpm
|specpower=
|compression=5.15:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
{{Commons category}}
=Notes=
{{reflist}}
=Bibliography=
{{refbegin}}
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
{{refend}}
{{Walter aeroengines}}
{{Aeroengine-specs}}