# Rotax 535

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Austrian two-stroke aircraft engine

Rotax 535 Type Aircraft engine National origin Austria Manufacturer Rotax First run circa 1982 Major applications Glaser-Dirks DG-500M Schempp-Hirth Janus Schempp-Hirth Nimbus-4

The **Rotax 535** is an [Austrian](/source/Austria) [aircraft engine](/source/Aircraft_engine), that was designed and produced by [Rotax](/source/Rotax) of [Gunskirchen](/source/Gunskirchen) for use in [motor gliders](/source/Motor_glider).[1]

The first application for [type certification](/source/Type_certificate) to [JAR 22](/source/JAR_22), Appendix H, was made on 29 June 1982 and the first certification was granted on 27 April 1983.[1] It is out of production and is no longer offered for sale by Rotax.[2]

## Design and development

The Rotax 535 is a twin cylinder [two-stroke](/source/Two-stroke), [in-line](/source/Straight_engine), 521.2 cc (31.8 cu in) displacement, liquid-cooled, gasoline engine design, with a 3:1 belt [reduction drive](/source/Reduction_drive). It employs dual [Bosch](/source/Robert_Bosch_GmbH) or [Ducati](/source/Ducati) magnetic high-voltage condenser ignition systems, one or two carburetors and produces a maximum of 60 hp (45 kW) at 7200 rpm. It runs on 96 octane automotive gasoline or 100LL [avgas](/source/Avgas). Lubrication is 50:1 super two stroke oil premixed with the fuel.[1]

## Variants

**535A**
- Equipped with twin [Tillotson](https://en.wikipedia.org/w/index.php?title=Tillotson_Manufacturing_Company&action=edit&redlink=1) HR or [Mikuni](/source/Mikuni_(company)) BN 38 diaphragm carburetors and a Mikuni DF 44 diaphragm fuel pump. Produces 60 hp (45 kW) at 7200 rpm. First certified on 27 April 1983.[1]

**535B**
- Equipped with twin Tillotson HR or Mikuni BN 38 diaphragm carburetors and a Mikuni DF 44 diaphragm fuel pump. Produces 55 hp (41 kW) at 7200 rpm. First certified on 27 April 1983.[1]

**535C**
- Equipped with one Mikuni BN 38 diaphragm carburetor and a Mikuni DF 44 diaphragm fuel pump. Produces 60 hp (45 kW) at 7200 rpm. First certified on 12 June 1987.[1]

## Applications

- [Glaser-Dirks DG-500M](/source/Glaser-Dirks_DG-500M)[3]

- [Rolladen-Schneider LS9](/source/Rolladen-Schneider_LS9) - prototype

- [Schempp-Hirth Janus](/source/Schempp-Hirth_Janus)

- [Schempp-Hirth Nimbus-4](/source/Schempp-Hirth_Nimbus-4)

- [Schleicher ASH 25](/source/Schleicher_ASH_25)

## Specifications (535A)

*Data from* EASA Type Certificate[1]

### General characteristics

- **Type:** Twin cylinder, two stroke aircraft engine

- **[Bore](/source/Bore_(engine)):** 72 mm (2.8 in)

- **[Stroke](/source/Stroke_(engine)):** 64 mm (2.5 in)

- **[Displacement](/source/Engine_displacement):** 521.2 cc (31.8 cu in)

### Components

- **Fuel system:** 2 x Tillotson HR or Mikuni BN 38 diaphragm carburetors, with a Mikuni DF 44 diaphragm fuel pump

- **Fuel type:** 96 octane automotive gasoline or 100LL [avgas](/source/Avgas)

- **Oil system:** 50:1 super two stroke oil premixed with fuel

- **Cooling system:** liquid

- **[Reduction gear](/source/Propeller_speed_reduction_unit):** 3:1 belt [reduction drive](/source/Reduction_drive)

### Performance

- **Power output:** 60 hp (45 kW)

- **Fuel consumption:** 100% power approximately 29 L/h (7.67 gal/h), 75% power approximately 22 L/h (5.82 gal/h)

## See also

**Related lists**

- [List of aircraft engines](/source/List_of_aircraft_engines)

## References

1. ^ [***a***](#cite_ref-typecertE209_1-0) [***b***](#cite_ref-typecertE209_1-1) [***c***](#cite_ref-typecertE209_1-2) [***d***](#cite_ref-typecertE209_1-3) [***e***](#cite_ref-typecertE209_1-4) [***f***](#cite_ref-typecertE209_1-5) [***g***](#cite_ref-typecertE209_1-6) [European Aviation Safety Agency](/source/European_Aviation_Safety_Agency), (26 February 2010), [Type Certificate Data Sheet Number: E.209](http://easa.europa.eu/system/files/dfu/EASA-TCDS-E.209_BRP--Powertrain_Rotax_535_series_engines-01-26022010.pdf), retrieved 24 September 2015

1. **[^](#cite_ref-2)** [Rotax](/source/Rotax). ["Rotax Aircraft Engines - Product Range"](http://www.flyrotax.com/products.html). *flyrotax.com*. Retrieved 24 September 2015.

1. **[^](#cite_ref-3)** [Aircraft Owners and Pilots Association](/source/Aircraft_Owners_and_Pilots_Association). ["The Glaser-Dirks DG500M"](https://www.aopa.org/News-and-Video/All-News/1993/January/1/The-Glaser-Dirks-DG500M). *aopa.org*. Retrieved 24 September 2015.

## External links

- [Photo of a Rotax 535 engine](http://www.tasmaninstruments.com.au/images/probes_a.jpg)

v t e Rotax aircraft engines Two-stroke piston engines 185 275 277 377 447 462 503 532 535 582 618 Four-stroke piston engines 912 914 915 916

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Adapted from the Wikipedia article [Rotax 535](https://en.wikipedia.org/wiki/Rotax_535) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Rotax_535?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.