2si 215
| {{Infobox Aircraft Begin
| name=2si 215 | image= | caption= }}{{Infobox Aircraft Engine |type= Two-stroke aircraft engine |manufacturer=2si |national origin=United States |first run= |major applications= |produced= |number built= |program cost= |unit cost= |developed from= |variants with their own articles= }} |
The 2si 215 is a family of single-cylinder, fan-cooled, two-stroke, single ignition, aircraft engines that were designed for ultralight aircraft.Cuyuna Development Company: Cuyuna Engines, Cuyuna Development Company, undated
The basic engine was originally designed and produced by JLO-Motorenwerke of Germany and was later acquired by the AMW Cuyuna Engine Company of Beaufort, South Carolina and marketed under the Cuyuna brand name. Later the engine was marketed by Cuyuna under the Two Stroke International (2si) brand. Cuyuna no longer markets engines for aircraft use although the 215 is still in production as an industrial and multi-fuel engine.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-2 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}{{cite web |date=n.d. |title=2si Company Profile |url=http://www.2si.com/2si_company_profile.htm |url-status=dead |archiveurl=https://web.archive.org/web/20100115032358/http://www.2si.com/2si_company_profile.htm |archivedate=2010-01-15 |accessdate=2010-02-16}}{{cite web |date=n.d. |title=Engine Model 215F Industrial Configuration |url=http://www.2si.com/215f_ind_spec.htm |url-status=dead |archive-url=https://archive.today/20130116034438/http://www.2si.com/215f_ind_spec.htm |archive-date=2013-01-16 |accessdate=2010-02-22}}{{cite web |date=n.d. |title=Diesel / Multi-fuel Engine Model 215 MF Industrial Configurations |url=http://www.2si.com/215_MF_Diesel_spec.htm |url-status=dead |archiveurl=https://web.archive.org/web/20100117061841/http://www.2si.com/215_MF_Diesel_spec.htm |archivedate=2010-01-17 |accessdate=2010-02-22}}
Development
The 215 is a conventional single-cylinder engine that weighs {{convert|39|lb|kg|0|abbr=on}} in its 215R aircraft version. The engine features single breaker and points ignition, with single capacitor discharge ignition used on the current models. It also incorporates piston porting, tuned exhaust system, single carburetor, fan cooling, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout. The 215R aircraft version was offered with an optional belt reduction system and the modern industrial versions have an optional gearbox with ratios of 2.04, 2.65 and 3.06. Starting is a recoil starter with a custom electric starter available as an option.
Variants
;215D
:Gasoline aircraft engine with direct drive. Single carburetor, {{convert|20|hp|kW|0|abbr=on}} at 6000 rpm, weight {{convert|42|lb|kg|0|abbr=on}}, out of production.
;215F
:Gasoline industrial engine. Single carburetor, {{convert|20|hp|kW|0|abbr=on}} at 6000 rpm, still in production.
;215MF
:Multi-fuel industrial engine. Single carburetor, {{convert|7|to|12|hp|kW|0|abbr=on}} at 6500 rpm, weight {{convert|53|lb|kg|0|abbr=on}}, still in production.
;215R
:Gasoline aircraft engine with belt reduction drive. single carburetor, {{convert|20|hp|kW|0|abbr=on}} at 6000 rpm, weight {{convert|39|lb|kg|0|abbr=on}}, out of production.
Applications
Specifications (215D aircraft engine)
{{pistonspecs|
|type=Single-cylinder, two-stroke aircraft engine
|bore={{convert|2.658|in|mm|1|abbr=on}}
|stroke={{convert|2.362|in|mm|1|abbr=on}}
|displacement=214 cc (13.06 cu in)
|length={{convert|11.75|in|mm|1|abbr=on}}
|diameter=
|width={{convert|7.0|in|mm|1|abbr=on}}
|height={{convert|14.0|in|mm|1|abbr=on}}
|weight={{convert|42|lb|kg|0|abbr=on}}
|valvetrain=piston porting
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=Regular auto fuel
|oilsystem=premixed oil and fuel at 50:1
|coolingsystem=fan cooled
|power={{convert|20|hp|kW|0|abbr=on}} at 6000 rpm
|specpower=
|compression=12.5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=optional belt reduction
|general_other=
|components_other=
|performance_other=
}}
See also
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