2si 460

{{Short description|I-2 piston aircraft engine}}  {{infobox aero engine | name = 2si 460 | 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 460''' is a family of in-line twin-cylinder, two-stroke, single ignition, aircraft engines that were designed for ultralight aircraft.<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>

The basic engine was originally designed and produced by ILO-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 460 is still in production as a Diesel/multifuel or gasoline industrial, marine and sport vehicle engine.<ref name="Cliche" /><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 |access-date=2010-02-16}}</ref><ref name="460MF">{{cite web |date=n.d. |title=Diesel / Multi-fuel Engine - Model 460 MF - Marine and Industrial Applications |url=http://www.2si.com/460_mf_spec.htm |url-status=dead |archiveurl=https://web.archive.org/web/20100115014642/http://www.2si.com/460_mf_spec.htm |archivedate=2010-01-15 |access-date=2010-02-18}}</ref><ref name="460fIndustrial">{{cite web |date=n.d. |title=Engine Models 460F-35 and 460FE-35 Industrial Configuration |url=http://www.2si.com/460f_460-FE35_ind.htm |url-status=dead |archiveurl=https://web.archive.org/web/20100306015231/http://www.2si.com/460f_460-FE35_ind.htm |archivedate=2010-03-06 |access-date=2010-02-18}}</ref><ref name="460L50JetPumpMarine">{{cite web |date=n.d. |title=460L-50 Engine & JP-2 Jet Pump Package |url=http://www.2si.com/460l-50_JP-2_spec.htm |url-status=dead |archive-url=https://web.archive.org/web/20090901105434/http://www.2si.com/460l-50_JP-2_spec.htm |archive-date=2009-09-01 |access-date=2010-02-18}}</ref><ref name="460L50Marine">{{cite web |date=n.d. |title=MARINE ENGINE MODEL 460L-50 |url=http://www.2si.com/marine_engine_mode_460lspec.htm |url-status=dead |archive-url=https://archive.today/20130116002139/http://www.2si.com/marine_engine_mode_460lspec.htm |archive-date=2013-01-16 |access-date=2010-02-18}}</ref><ref name="460F35Sport">{{cite web |date=n.d. |title=Engine Models 460F-35 and 460FE-35 Sport Configuration |url=http://www.2si.com/460f_460FE_35%20Sport_%20spec.htm |url-status=dead |archive-url=https://archive.today/20130116010832/http://www.2si.com/460f_460FE_35%20Sport_%20spec.htm |archive-date=2013-01-16 |access-date=2010-02-18}}</ref>

==Development== The 460 is a conventional twin-cylinder engine that weighs {{convert|59|lb|kg|0|abbr=on}} in its F35 aircraft version. The engine features single capacitor discharge ignition, piston porting, tuned exhaust system, one or two slide venturi-type carburetors, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout. The aircraft version was offered with cog belt drive or a gearbox reduction system. Starting is electric starter or recoil starter.<ref name="Cliche" />

==Variants== ;460-F35 :Gasoline aircraft engine, single carburetor, {{convert|35|hp|kW|0|abbr=on}} at 6000 rpm, weight {{convert|59|lb|kg|0|abbr=on}} (discontinued).<ref name="Cliche" /> ;460-F40 :Gasoline aircraft engine, single carburetor, {{convert|40|hp|kW|0|abbr=on}} at 6500 rpm, weight {{convert|70|lb|kg|0|abbr=on}} (discontinued).<ref name="Aerocrafter">Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 69. BAI Communications. {{ISBN|0-9636409-4-1}}</ref> ;460-F45 :Gasoline aircraft engine, dual carburetors, {{convert|45|hp|kW|0|abbr=on}} at 6750 rpm, weight {{convert|70|lb|kg|0|abbr=on}} (discontinued).<ref name="Cliche" /> ;460 MF :Diesel/multi-fuel engine for marine and industrial applications, {{convert|37|hp|kW|0|abbr=on}} at 6000 rpm, weight {{convert|78.5|lb|kg|0|abbr=on}} without gearbox.<ref name="460MF" /> ;460F-35 :Gasoline industrial engine and sport vehicle engine for auto racing, kart and All-terrain vehicle applications, single carburetor, {{convert|35|hp|kW|0|abbr=on}} at 6000 rpm, basic weight {{convert|55|lb|kg|0|abbr=on}}.<ref name="460fIndustrial" /><ref name="460F35Sport" /> ;460FE-35 :Gasoline industrial engine and sport vehicle engine for auto racing, kart and ATV applications with electric start, single carburetor, {{convert|35|hp|kW|0|abbr=on}} at 6000 rpm, basic weight {{convert|55|lb|kg|0|abbr=on}}.<ref name="460fIndustrial" /><ref name="460F35Sport" /> ;460L-50 :Gasoline marine engine powering a jet pump, {{convert|50|hp|kW|0|abbr=on}} at 6750 rpm.<ref name="460L50JetPumpMarine" /><ref name="460L50Marine" />

==Applications== {{columns-list|colwidth=22em| *Aero-Works Aerolite 103 *Calumet Snobird Explorer *Denney Kitfox *Fisher Avenger *Fletcher Hercules *Goodwin Buckshot *Harmening High Flyer *Heldeberg Spirit 103 *Little Wing Roto-Pup *RagWing RW1 Ultra-Piet *RagWing RW2 Special I *RagWing RW9 Motor Bipe *Raven Explorer I *Spacek SD-1 Minisport *V-STOL Pairadigm *V-STOL Super Solution 2000 *V-STOL XC 2000T *Wings of Freedom Flitplane }}

==Specifications (460-F35 aircraft engine) == {{pistonspecs|   |ref = Cliche<ref name="Cliche" /> |type = Twin-cylinder, two-stroke aircraft engine |bore = {{convert|69.5|mm|in|2|abbr=on}} |stroke = {{convert|60.0|mm|in|2|abbr=on}} |displacement = 455 cc (27.77 cu in) |length = {{convert|14.5|in|mm|2|abbr=on}} |diameter = |width = {{convert|16.0|in|mm|2|abbr=on}} |height = {{convert|16.0|in|mm|2|abbr=on}} |weight = {{convert|59|lb|kg|0|abbr=on}} |valvetrain = piston porting |supercharger = |turbocharger = |fuelsystem = |fueltype = Minimum 92 octane |oilsystem = premixed oil and fuel |coolingsystem = fan cooled |power = {{convert|35|hp|kW|0|abbr=on}} at 6000 rpm |specpower = |compression = |fuelcon = |specfuelcon = |oilcon = |power/weight =

|designer = |reduction_gear = cog belt or optional gearbox

|general_other = |components_other = |performance_other = }}

==See also== {{Aircontent  |see also = *List of aircraft engines *Hirth 2702 *Rotax 377 |related =  |similar aircraft =  |lists = }}

==References== {{Reflist|30em}}

Category:Air-cooled aircraft piston engines Category:Two-stroke aircraft piston engines Category:Straight-twin engines Category:2si engines