2si 215

{{infobox aero engine | name=2si 215 | image= | caption= |engine_type= [[Two-stroke]] [[aircraft engine]] |manufacturer=[[2si]] |national_origin=[[United States]] |first_run= |major applications= |produced= |number_built= |program cost= |developed_from= |variants_with_their_own_articles= }}

The '''2si 215''' is a family of single-cylinder, fan-cooled, [[two-stroke]], single ignition, [[aircraft engine]]s that were designed for [[ultralight aircraft]].<ref name="Cuyuna">Cuyuna Development Company: ''Cuyuna Engines'', Cuyuna Development Company, undated</ref>

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.<ref name="Cliche">Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-2 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}</ref><ref name="About2si">{{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}}</ref><ref name="215F">{{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}}</ref><ref name="215MF">{{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}}</ref>

==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.<ref name="Cuyuna" /><ref name="215F" /><ref name="215MF" />

==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.<ref name="Cuyuna" /> ;215F :Gasoline industrial engine. Single carburetor, {{convert|20|hp|kW|0|abbr=on}} at 6000 rpm, still in production.<ref name="215F" /> ;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.<ref name="215MF" /> ;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.<ref name="Cuyuna" />

==Applications== {{columns-list|colwidth=30em| *[[Advanced Aviation Husky]] *[[Birdman Atlas 215 XC]] *[[Birdman Atlas 215 3-A]] *[[Carlson Sparrow]] *[[Eipper Quicksilver]] *[[Paup P-Craft]] *[[Robertson B1-RD]] *[[Rutan Solitaire]] *[[Striplin Silver Cloud]] *[[Wood Sky Pup]] }}

==Specifications (215D aircraft engine) == {{pistonspecs|   |ref=Cuyuna<ref name="Cuyuna" /> & 2si<ref name="215F" /> |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=[[Avgas#Automotive gasoline|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== {{aircontent  |see also= *[[List of aircraft engines]] *[[Hirth F33]] *[[KFM 107]] *[[Rotax 277]] |related= |similar aircraft= |lists= }}

==References== {{Reflist}}

[[Category:Air-cooled aircraft piston engines]] [[Category:Two-stroke aircraft piston engines]] [[Category:2si engines]] [[Category:Single-cylinder engines]]