Walter Junior
{{Short description|1930s Czech piston aircraft engine}}
| {{Infobox Aircraft Begin
|name= Junior |image = File:Walter Junior 4 (1932-6).jpg |caption = }} {{Infobox Aircraft Engine |type= Inline piston engine |national origin = Czechoslovakia |manufacturer= Walter Aircraft Engines |first run= 1932 |major applications= |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The Walter Junior was a family of four cylinder air cooled inverted inline engines produced by Walter Aircraft Engines in Czechoslovakia in the 1930s for aircraft, characterised by a bore and stroke of {{cvt|4.53|x|5.51|in|order=flip}}, a displacement of {{cvt|354.8|cuin|order=flip}} and producing roughly {{cvt|105|hp|order=flip}}.
The Junior was also built in Poland as the P.Z. Inż. Junior.{{cite web |last1=Forbes |first1=Peter |last2=Forbes |first2=Rita |title=Engine Data Sheets:Czechoslovakian Aero Engines: Page 117 of 140 |url=http://www.oldengine.org/members/diesel/Duxford/czechaer1.htm |website=Peter & Rita Forbes' Engine Webpages|accessdate=20 April 2018}}
Variants
;Walter Junior 4-I
:{{convert|105|hp|kW|abbr=on|disp=flip}} at 2,000 rpm.
;Walter Junior-Major
:{{convert|120|hp|kW|abbr=on|disp=flip}} at 2,100 rpm (nominal), {{convert|130|hp|kW|abbr=on|disp=flip}} at 2,350 rpm (maximum).
;P.Z. Inż. Junior
:Approximately 600 engines manufactured under license in Poland by Państwowe Zakłady Inżynierii, Warsaw.
;Elizalde J4
:Approximately 150 engines manufactured under license in Spain by Elizalde SA Barcelona.
Applications
Specifications
{{pistonspecs
|
|ref=
|type=4-cylinder inverted air-cooled inline
|bore={{convert|115|mm|in|abbr=on}}
|stroke={{convert|140|mm|in|abbr=on}}
|displacement={{convert|5.816|L|cuin|abbr=on|1}}
|length={{convert|1182|mm|in|abbr=on}}
|diameter=
|width={{convert|526|mm|in|abbr=on}}
|height={{convert|767|mm|in|abbr=on}}
|weight={{convert|135|kg|lb|abbr=on}} dry
|valvetrain=One intake and one exhaust valve per cylinder operated by pushrods and rockers
|supercharger=
|turbocharger=
|fuelsystem=Zenith or Claudel-Hobson carburettor
|fueltype=68 octane petrol
|oilsystem=Pressure fed, dry sump
|coolingsystem=Air-cooled
|power= {{convert|105|hp|kW|abbr=on|disp=flip}} at 2,000 rpm (nominal), {{convert|120|hp|kW|abbr=on|disp=flip}} at 2,200 rpm (maximum)
|specpower=
|compression=5.2:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=Direct drive, left hand tractor
|general_other=
|components_other=
|performance_other=
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
{{Commons category}}
{{reflist}}
{{Walter aeroengines}}
Category:Aircraft air-cooled inline piston engines