Szekely SR-3
{{Infobox aircraft begin
|name = SR-3 |image = Szekely SR-3.jpg |caption = SR-3 Model L - Flathead version of the Szekely SR-3 aircraft engine, Pima Air & Space Museum }}{{Infobox Aircraft Engine |type=Radial engine |manufacturer= Szekely |national origin= |first run= |major applications= |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
Szekely aircraft engines were three-cylinder radial engines built in Holland, Michigan in the 1920s and 30s. They were used to power small aircraft such as the Rearwin Junior, Taylor H-2 and American Eagle Eaglet. Often criticized for reliability issues and design flaws, many were replaced with better engines in their original airframes. Few examples still exist but a museum quality example is on display in the Holland Museum in Holland, Michigan.
Variants
Data from:Jane's all the World's Aircraft 1931{{cite book |title=Jane's all the World's Aircraft 1931 |editor1-last=Grey |editor1-first=C.G. |year=1931 |publisher=Sampson Low, Marston & company, ltd |location=London |page=86d}}
;SR-3 O:Overhead valve combustion chamber, compression ratio 4.6:1, {{cvt|45|hp}} at 1,750 rpm.
;SR-3 L:Side-valve combustion chamber, compression ratio 5:1, {{cvt|30|hp}} at 1,750 rpm.
Applications
Specifications (SR-3 Model O)
{{pistonspecs|
|ref=American Engine Specifications,{{cite magazine|title=Table 4: American Engine Specifications|magazine=Aviation |date=July 1931|volume=30|issue=7|page=43|url=http://archive.aviationweek.com/issue/19310701/#!&pid=432|url-access=registration }} Jane's all the World's Aircraft 1938,{{cite book |title=Jane's all the World's Aircraft 1938 |editor1-last=Grey |editor1-first=C.G. |year=1938 |publisher=Sampson Low, Marston & company, ltd |location=London |editor2-last=Bridgman|editor2-first=Leonard|page=102d}} Jane's all the World's Aircraft 1931
|type=Three-cylinder radial engine
|bore={{convert|4+1/8|in|mm|0|abbr=on}}
|stroke={{convert|4+3/4|in|mm|0|abbr=on}}
|displacement={{convert|191|cuin|L|abbr=on}}
|length={{convert|25|in|mm|0|abbr=on}} overall
|diameter={{convert|36|in|mm|0|abbr=on}} (Model L {{cvt|30|in}})
|width=
|height=
|weight={{convert|147|lb|kg|abbr=on}}
|valvetrain= one camshaft per cylinder: pushrod-operated overhead inlet outlet valves, one each per cylinder; (Model L valves directly operated by tappets.)
|supercharger=
|turbocharger=
|fuelsystem=Stromberg NA-S3 Carburetor or Zenith equivalent
|fueltype=
|oilsystem=
|coolingsystem=Air-cooled
|power={{convert|45|hp|kW|abbr=on}} at 1,750 rpm
|specpower=
|compression=
|fuelcon=
|specfuelcon=0.60 lb/(hp·h) [0.365 kg/(kW·h)]
|oilcon=0.16 lb/(hp·h)
|power/weight=
|designer=
|reduction_gear=
|general_other=
|components_other=Bosch FU6/3 or Scintilla magnetoes
|performance_other=
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
{{Commons category}}
{{reflist}}
External links
- [https://web.archive.org/web/20051222134744/http://oldrhinebeck.org/collection/engines/Szekely%20SR-3%20L.htm "Szekely SR-3 L"] Old Rhinebeck Aerodrome, retrieved October 30, 2007