# 2si 215 > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/2si_215 > Markdown URL: https://mediated.wiki/source/2si_215.md > Source: https://en.wikipedia.org/wiki/2si_215 > Source revision: 1349524564 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) 2si 215 Type Two-stroke aircraft engine National origin United States Manufacturer 2si The **2si 215** is a family of single-cylinder, fan-cooled, [two-stroke](/source/Two-stroke), single ignition, [aircraft engines](/source/Aircraft_engine) that were designed for [ultralight aircraft](/source/Ultralight_aircraft).[1] The basic engine was originally designed and produced by [JLO-Motorenwerke](/source/JLO-Motorenwerke) of [Germany](/source/Germany) and was later acquired by the [AMW Cuyuna Engine Company](/source/AMW_Cuyuna_Engine_Company) of [Beaufort, South Carolina](/source/Beaufort%2C_South_Carolina) and marketed under the *Cuyuna* brand name. Later the engine was marketed by Cuyuna under the [Two Stroke International](/source/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.[2][3][4][5] ## Development The 215 is a conventional single-cylinder engine that weighs 39 lb (18 kg) in its 215R aircraft version. The engine features single breaker and points ignition, with single [capacitor discharge ignition](/source/Capacitor_discharge_ignition) used on the current models. It also incorporates piston porting, tuned exhaust system, single [carburetor](/source/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](/source/Recoil_starter) with a custom electric starter available as an option.[1][4][5] ## Variants **215D** - Gasoline aircraft engine with direct drive. Single carburetor, 20 hp (15 kW) at 6000 rpm, weight 42 lb (19 kg), out of production.[1] **215F** - Gasoline industrial engine. Single carburetor, 20 hp (15 kW) at 6000 rpm, still in production.[4] **215MF** - Multi-fuel industrial engine. Single carburetor, 7 to 12 hp (5 to 9 kW) at 6500 rpm, weight 53 lb (24 kg), still in production.[5] **215R** - Gasoline aircraft engine with belt reduction drive. single carburetor, 20 hp (15 kW) at 6000 rpm, weight 39 lb (18 kg), out of production.[1] ## Applications - [Advanced Aviation Husky](/source/Advanced_Aviation_Husky) - [Birdman Atlas 215 XC](/source/Birdman_Atlas_215_XC) - [Birdman Atlas 215 3-A](/source/Birdman_Atlas_215_3-A) - [Carlson Sparrow](/source/Carlson_Sparrow) - [Eipper Quicksilver](/source/Eipper_Quicksilver) - [Paup P-Craft](/source/Paup_P-Craft) - [Robertson B1-RD](/source/Robertson_B1-RD) - [Rutan Solitaire](/source/Rutan_Solitaire) - [Striplin Silver Cloud](/source/Striplin_Silver_Cloud) - [Wood Sky Pup](/source/Wood_Sky_Pup) ## Specifications (215D aircraft engine) *Data from* Cuyuna[1] & 2si[4] ### General characteristics - **Type:** Single-cylinder, two-stroke aircraft engine - **[Bore](/source/Bore_(engine)):** 2.658 in (67.5 mm) - **[Stroke](/source/Stroke_(engine)):** 2.362 in (60.0 mm) - **[Displacement](/source/Engine_displacement):** 214 cc (13.06 cu in) - **Length:** 11.75 in (298.4 mm) - **Width:** 7.0 in (177.8 mm) - **Height:** 14.0 in (355.6 mm) - **[Dry weight](/source/Dry_weight):** 42 lb (19 kg) ### Components - **[Valvetrain](/source/Valvetrain):** piston porting - **Fuel type:** [Regular auto fuel](/source/Avgas#Automotive_gasoline) - **Oil system:** premixed oil and fuel at 50:1 - **Cooling system:** fan cooled - **[Reduction gear](/source/Propeller_speed_reduction_unit):** optional belt reduction ### Performance - **Power output:** 20 hp (15 kW) at 6000 rpm - **[Compression ratio](/source/Compression_ratio):** 12.5:1 ## See also - [List of aircraft engines](/source/List_of_aircraft_engines) - [Hirth F33](/source/Hirth_F33) - [KFM 107](/source/KFM_107) - [Rotax 277](/source/Rotax_277) ## References 1. ^ [***a***](#cite_ref-Cuyuna_1-0) [***b***](#cite_ref-Cuyuna_1-1) [***c***](#cite_ref-Cuyuna_1-2) [***d***](#cite_ref-Cuyuna_1-3) [***e***](#cite_ref-Cuyuna_1-4) Cuyuna Development Company: *Cuyuna Engines*, Cuyuna Development Company, undated 1. **[^](#cite_ref-Cliche_2-0)** Cliche, Andre: *Ultralight Aircraft Shopper's Guide* 8th Edition, page G-2 Cybair Limited Publishing, 2001. [ISBN](/source/ISBN_(identifier)) [0-9680628-1-4](https://en.wikipedia.org/wiki/Special:BookSources/0-9680628-1-4) 1. **[^](#cite_ref-About2si_3-0)** ["2si Company Profile"](https://web.archive.org/web/20100115032358/http://www.2si.com/2si_company_profile.htm). n.d. Archived from [the original](http://www.2si.com/2si_company_profile.htm) on 2010-01-15. Retrieved 2010-02-16. 1. ^ [***a***](#cite_ref-215F_4-0) [***b***](#cite_ref-215F_4-1) [***c***](#cite_ref-215F_4-2) [***d***](#cite_ref-215F_4-3) ["Engine Model 215F Industrial Configuration"](http://www.2si.com/215f_ind_spec.htm). n.d. Retrieved 2010-02-22.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service)) 1. ^ [***a***](#cite_ref-215MF_5-0) [***b***](#cite_ref-215MF_5-1) [***c***](#cite_ref-215MF_5-2) ["Diesel / Multi-fuel Engine Model 215 MF Industrial Configurations"](https://web.archive.org/web/20100117061841/http://www.2si.com/215_MF_Diesel_spec.htm). n.d. Archived from [the original](http://www.2si.com/215_MF_Diesel_spec.htm) on 2010-01-17. Retrieved 2010-02-22. v t e 2si engines Aircraft engines 215 230 340 430 460 540 690 808 Multi Fuel Engines 215 MF 230 MF 460 MF Industrial Engines 215 230 460 690 Marine Engines & Jet pumps 460 690 Sport Vehicle Engines 460 500 540 --- Adapted from the Wikipedia article [2si 215](https://en.wikipedia.org/wiki/2si_215) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/2si_215?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.