Rotax 535

{{short description|Austrian two-stroke aircraft engine}} {{Use dmy dates|date=March 2023}} {{Use American English|date=March 2023}} {{infobox aero engine | name=Rotax 535 | image= | caption= |engine_type=[[Aircraft engine]] |manufacturer=[[Rotax]] |designer= |national_origin=[[Austria]] |first_run=circa 1982 |major_applications={{ubl|[[Glaser-Dirks DG-500M]]|[[Schempp-Hirth Janus]]|[[Schempp-Hirth Nimbus-4]]}} |produced= |number_built= |developed_from= |variants_with_their_own_articles= }} The '''Rotax 535''' is an [[Austria]]n [[aircraft engine]], that was designed and produced by [[Rotax]] of [[Gunskirchen]] for use in [[motor glider]]s.<ref name="typecertE209">[[European Aviation Safety Agency]], (26 February 2010), [http://easa.europa.eu/system/files/dfu/EASA-TCDS-E.209_BRP--Powertrain_Rotax_535_series_engines-01-26022010.pdf Type Certificate Data Sheet Number: E.209], retrieved 24 September 2015</ref>

The first application for [[Type certificate|type certification]] to [[JAR 22]], Appendix H, was made on 29 June 1982 and the first certification was granted on 27 April 1983.<ref name="typecertE209"/> It is out of production and is no longer offered for sale by Rotax.<ref>{{cite web|url=http://www.flyrotax.com/products.html|title=Rotax Aircraft Engines - Product Range|work=flyrotax.com|author=[[Rotax]]|accessdate=24 September 2015}}</ref>

==Design and development== The Rotax 535 is a twin cylinder [[two-stroke]], [[Straight engine|in-line]], {{convert|521.2|cc|cuin|1|abbr=on}} displacement, liquid-cooled, gasoline engine design, with a 3:1 belt [[reduction drive]]. It employs dual [[Robert Bosch GmbH|Bosch]] or [[Ducati]] magnetic high-voltage condenser ignition systems, one or two carburetors and produces a maximum of {{convert|60|hp|kW|0|abbr=on}} at 7200 rpm. It runs on 96 octane automotive gasoline or 100LL [[avgas]]. Lubrication is 50:1 super two stroke oil premixed with the fuel.<ref name="typecertE209"/>

==Variants== ;535A :Equipped with twin [[Tillotson Manufacturing Company|Tillotson]] HR or [[Mikuni (company)|Mikuni]] BN 38 diaphragm carburetors and a Mikuni DF 44 diaphragm fuel pump. Produces {{convert|60|hp|kW|0|abbr=on}} at 7200 rpm. First certified on 27 April 1983.<ref name="typecertE209"/> ;535B :Equipped with twin Tillotson HR or Mikuni BN 38 diaphragm carburetors and a Mikuni DF 44 diaphragm fuel pump. Produces {{convert|55|hp|kW|0|abbr=on}} at 7200 rpm. First certified on 27 April 1983.<ref name="typecertE209"/> ;535C :Equipped with one Mikuni BN 38 diaphragm carburetor and a Mikuni DF 44 diaphragm fuel pump. Produces {{convert|60|hp|kW|0|abbr=on}} at 7200 rpm. First certified on 12 June 1987.<ref name="typecertE209"/>

==Applications== *[[Glaser-Dirks DG-500M]]<ref>{{cite web|url=http://www.aopa.org/News-and-Video/All-News/1993/January/1/The-Glaser-Dirks-DG500M|title=The Glaser-Dirks DG500M|work=aopa.org|author=[[Aircraft Owners and Pilots Association]]| accessdate=24 September 2015}}</ref> *[[Rolladen-Schneider LS9]] - prototype *[[Schempp-Hirth Janus]] *[[Schempp-Hirth Nimbus-4]] *[[Schleicher ASH 25]]

==Specifications (535A) == {{pistonspecs| |ref=EASA Type Certificate<ref name="typecertE209"/> |type=Twin cylinder, two stroke aircraft engine |bore={{convert|72|mm|in|1|abbr=on}} |stroke={{convert|64|mm|in|1|abbr=on}} |displacement={{convert|521.2|cc|cuin|1|abbr=on}} |length= |diameter= |width= |height= |weight= |valvetrain= |supercharger= |turbocharger= |fuelsystem=2 x Tillotson HR or Mikuni BN 38 diaphragm carburetors, with a Mikuni DF 44 diaphragm fuel pump |fueltype=96 octane automotive gasoline or 100LL [[avgas]] |oilsystem=50:1 super two stroke oil premixed with fuel |coolingsystem=liquid |power={{convert|60|hp|kW|0|abbr=on}} |specpower= |compression= |fuelcon=100% power approximately 29 L/h (7.67 gal/h), 75% power approximately 22 L/h (5.82 gal/h) |specfuelcon= |oilcon= |power/weight=

|designer= |reduction_gear=3:1 belt [[reduction drive]]

|general_other= |components_other= |performance_other= }}

==See also== {{aircontent  |see also= |related= |similar aircraft= |lists= *[[List of aircraft engines]] }}

==References== {{Reflist}} ==External links== *[http://www.tasmaninstruments.com.au/images/probes_a.jpg Photo of a Rotax 535 engine] {{Rotax aeroengines}}

[[Category:Rotax engines]] [[Category:Two-stroke aircraft piston engines]] [[Category:Air-cooled aircraft piston engines]] [[Category:1980s aircraft piston engines]] [[Category:Twin-cylinder engines]]