{{short description|Two-stroke aircraft engine}} {{Use dmy dates|date=November 2021}} {{Use Canadian English|date=November 2021}} <!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. --> {{infobox aero engine | name=MZ 201 & MZ 202 | image= | caption= |engine_type= [[Two-stroke]] [[aircraft engine]] |manufacturer={{ubl|Zanzottera Technologies|Compact Radial Engines|Fiate Aviation}} |national_origin=[[Italy]] |first_run= |major_applications={{ubl|[[Wings of Freedom Flitplane]]|[[Spectrum Beaver|ASAP Beaver Plus 2]]}} |produced=2000–present |number_built= |developed_from= |variants_with_their_own_articles= }}

The '''Zanzottera MZ 201''' and '''MZ 202''' are a family of twin-cylinder, [[Inline engine (aviation)|in-line]] [[two-stroke]], [[dual ignition]] [[aircraft engine]]s designed for [[ultralight aircraft]] and [[motor glider]]s.<ref name="Cliche">Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-10 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}</ref><ref name="CRE201">{{cite web|url = http://www.compactradialengines.com/mz201.html|title = MZ-201, 2 cylinders 2 stroke; comes with belt or gearbox|access-date = 2010-01-12|last = Compact Radial Engines Inc|year = 2009|archive-url= https://web.archive.org/web/20130824180629/http://www.compactradialengines.com/mz201.html|archive-date= 24 August 2013|url-status=dead}}</ref><ref name="CRE202">{{cite web|url = http://www.compactradialengines.com/mz202.html|title = MZ-202, 2 cylinders 2 stroke complete with gearbox & clutch|access-date = 2010-01-12|last = Compact Radial Engines Inc|year = 2009|archive-url= https://web.archive.org/web/20130824174034/http://www.compactradialengines.com/mz202.html|archive-date= 24 August 2013|url-status=dead}}</ref>

The engine was originally designed and produced by Zanzottera Technologies of [[Italy]], but the design was sold, along with the rest of the company's two-stroke ultralight aircraft engine line, to Compact Radial Engines of [[Surrey, British Columbia]], [[Canada]].<ref name="CRE202" /> Compact Radial Engines was then in turn acquired by Fiate Aviation Co., Ltd. of [[Hefei, Anhui]], [[China]] in August 2017.<ref name="Fiate">{{cite web|url= http://www.fiate.net/en/|title= Fiate Aviation|access-date= 23 November 2021|author= Fiate Aviation|work= fiate.net|year= 2018|archive-url= https://web.archive.org/web/20210608204753/http://www.fiate.net/en/|archive-date= 8 June 2021|url-status= live}}</ref>

==Development== The MZ 202 was developed first as a {{convert|60|hp|kW|0|abbr=on}} lightweight competitor to the liquid-cooled {{convert|64|hp|kW|0|abbr=on}} [[Rotax 582]]. Later the MZ 201 was developed from the MZ 202 as a de-rated {{convert|45|hp|kW|0|abbr=on}} version intended for motorgliders and single place ultralights that needed more power than the single-cylinder [[Zanzottera MZ 34]].<ref name="Cliche" /><ref name="CRE201" /><ref name="CRE202" />

The MZ 201 and 202 both have a cylinder barrels that are [[Nikasil]]-coated. The bore and stroke are the same as the single-cylinder MZ 34 engine. The MZ 201 features an optional [[Rope start|recoil starter]] or electric starting, while the MZ 202 has electric starting only. The MZ 201 has a choice of a reduction drive belt or gearbox, while the MZ 202 offers just the gearbox with reduction ratios of 2.18, 2.55, 2.88, 3.11 or 3.66 to 1.<ref name="Cliche" /><ref name="CRE201" /><ref name="CRE202" /><ref name="MZ202Manual">{{cite web|url = http://www.compactradialengines.com/pdf/MZ202man0404.pdf|title = Instruction and Maintenance Manual MZ 202|access-date = 2010-01-12|last = Compact Radial Engines|date = n.d.|archive-date = 15 October 2009|archive-url = https://web.archive.org/web/20091015024644/http://www.compactradialengines.com/pdf/MZ202man0404.pdf|url-status = dead}}</ref>

The owners manual acknowledges the limitations inherent in the design of the engine, stating:

{{Blockquote|This is not an aeronautic approved engine. This engine has not been subjected to durability and safety tests in compliance with aeronautical standards and is not a certified engine. It is designed to be used in ULM or aeroplanes where engine failure will not produce serious consequences. The user must assume responsibility for all risks deriving from the use of this engine and must understand that this engine is subject to sudden failure. Engine failure may result in an emergency landing. Such accidents may cause serious material damage, injury and/or death. Never use an aircraft fitted with this engine in areas, conditions and altitudes that may cause problems if forced to land as a result of sudden engine failure.<ref name="MZ202Manual" /> }} <!-- ==Operational history== -->

==Variants== ;MZ 201 :Twin-cylinder, air-cooled, two-stroke dual ignition {{convert|45|hp|kW|0|abbr=on}} aircraft engine optimized for motorgliders and single place ultralights. Equipped with a single [[Tillotson Manufacturing Company|Tillotson]] [[carburetor]].<ref name="Cliche" /><ref name="CRE201" /> ;MZ 202 :Twin-cylinder, air-cooled, two-stroke dual ignition {{convert|60|hp|kW|0|abbr=on}} aircraft engine. Equipped with dual Bing carburetors.<ref name="Cliche" /><ref name="CRE202" /> ;MZ 202i :Twin-cylinder, air-cooled, two-stroke dual ignition {{convert|67|hp|kW|0|abbr=on}} aircraft engine. Equipped with [[electronic fuel injection]], controlled by a computerized engine management system. No longer in production<ref name="Cliche" /><ref name="CRE202" />

==Applications== ;MZ 201 *[[Belite Aircraft Superlite]] *[[SlipStream Scepter]] *[[SNAS Stryke-Air Bi]] *[[Spacek SD-1 Minisport]] *[[Star Bee Light]] *[[Taggart GyroBee]] *[[Wings of Freedom Flitplane]] ;MZ 202 *[[Spectrum Beaver|ASAP Beaver Plus 2]] *[[Apex Cross 5]] *[[Innovator Mosquito Air]] *[[Mosquito Aviation XE]] *[[Sabre Wildcat]] *[[Star Bee Total Bee]]

==Specifications (MZ 202) == {{pistonspecs| <!-- If you do not understand how to use this template, please ask at [[Wikipedia talk:WikiProject Aircraft]] --> <!-- Please include units where appropriate (main comes first, alt in parentheses). If data are missing, leave the parameter blank (do not delete it). For additional lines, end your alt units with )</li> and start a new, fully formatted line with <li> --> |ref=Instruction and Maintenance Manual MZ 202<ref name="MZ202Manual" /> |type=Twin-cylinder, two-stroke aircraft engine |bore={{convert|76|mm|in|2|abbr=on}} |stroke={{convert|69|mm|in|2|abbr=on}} |displacement=626&nbsp;cc (38.20 cu in) |length={{convert|313.5|mm|in|2|abbr=on}} |diameter= |width={{convert|299.4|mm|in|2|abbr=on}} |height={{convert|331.1|mm|in|2|abbr=on}} |weight={{convert|38|kg|lb|0|abbr=on}} with starter motor, two carburettors, fuel pump, cooling system and exhaust system. |valvetrain=Reed valve induction |supercharger= |turbocharger= |fuelsystem= |fueltype=[[Avgas#Automotive gasoline|Premium auto fuel]] |oilsystem=50:1 oil to fuel, premixed |coolingsystem=air-cooled |power={{convert|63|hp|kW|0|abbr=on}} at 6250&nbsp;rpm |specpower= |compression=9.1:1 |fuelcon= |specfuelcon= |oilcon= |power/weight=

|designer= |reduction_gear=RZ 2 gearbox with reduction ratios of 2.18, 2.55, 2.88, 3.11 or 3.66 to 1

|general_other= |components_other= |performance_other= }}

==See also== {{aircontent <!-- include as many lines are appropriate. additional lines/entries with carriage return. --> |see also= *[[Hirth 2704|Hirth 2706]] *[[Rotax 582]] |related=<!-- related developments --> |similar aircraft=<!-- similar or comparable aircraft --> |lists= }}

==References== {{Reflist}}

==External links== *[http://www.fiate.net/en/mz201.html Official MZ 201 website] *[http://www.fiate.net/en/mz202.html Official MZ 202 website]

{{Zanzottera}} [[Category:Compact Radial Engines aircraft engines]] [[Category:Zanzottera aircraft engines]] [[Category:Aircraft air-cooled inline piston engines]] [[Category:Two-stroke aircraft piston engines]] [[Category:Straight-twin engines]]