Rotax 535

The Rotax 535 is an Austrian aircraft engine, that was designed and produced by Rotax of Gunskirchen for use in motor gliders.^[1]

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 first application for type certification to 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, in-line, 521.2 cc (31.8 cu in) displacement, liquid-cooled, gasoline engine design, with a 3:1 belt reduction drive. It employs dual Bosch or 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. Lubrication is 50:1 super two stroke oil premixed with the fuel.^[1]

Variants

535A

Equipped with twin Tillotson HR or Mikuni 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^[3]
• Rolladen-Schneider LS9 - prototype
• Schempp-Hirth Janus
• Schempp-Hirth Nimbus-4
• Schleicher ASH 25

Specifications (535A)

Data from EASA Type Certificate^[1]

General characteristics

• Type: Twin cylinder, two stroke aircraft engine
• Bore: 72 mm (2.8 in)
• Stroke: 64 mm (2.5 in)
• 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
• Oil system: 50:1 super two stroke oil premixed with fuel
• Cooling system: liquid
• Reduction gear: 3:1 belt 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