Rotax 915 iS explained

The Rotax 915 iS is an Austrian aircraft engine, produced by Rotax of Gunskirchen for use in ultralight aircraft, homebuilt aircraft, light-sport aircraft, small helicopters and gyroplanes. The engine was type certified in 2017.[1] [2]

The engine was first publicly displayed at AirVenture in July 2015[1] and first flown in March 2016.[3]

In January 2016 the engine was named AVweb's "Best New Engine" of 2015.[4]

Design and development

The Rotax 915 iS is a four-cylinder four-stroke, horizontally-opposed, turbocharged, air and liquid-cooled, gasoline engine design, with a mechanical gearbox reduction drive. The turbocharger has a compression ratio of 3.5:1 and the engine will have a critical altitude of 150000NaN0. It employs dual electronically controlled fuel injection, using dual channel Rockwell Collins ECUs, with dual ignition and produces 1410NaN0 for take-off and 1350NaN0 continuous. The engine can produce rated power up to 150000NaN0 and has a ceiling of 230000NaN0.[1]

The engine is based on the Rotax 912, but differs in that it has fuel injection, a reinforced crankshaft, new pistons, a new gearbox and a turbocharger. Time between overhauls was expected to eventually be raised to 2000 hours with operational experience, but started at 1200 hours.[1] [5]

The design entered production in the second half of 2017. The European Aviation Safety Agency certified the Rotax 915 iSc3 A on 14 December 2017 and the Rotax 915 iSc3 B on 4 January 2018.[6]

In December 2021 the option to replace the 12V electrical system with a 24V one was introduced. The 24V version of the engine is designated the 915iS C24 for the non-certified version and the 915iSc C24 certified version.[7]

Variants

Rotax 915iS
  • Base version with a 12V electrical system
    Rotax 915iS C24
  • Non-certified model with 24V electrical system[7]
    Rotax 915iSc C24
  • Certified model with 24V electrical system[7]

    Applications

    External links

    Notes and References

    1. Web site: Rotax Announces New 135-hp Turbocharged Engine. AVweb. 21 July 2015. 22 July 2015.
    2. Web site: Rotax-Owner.com - ROTAX 915 IS: BRP UNVEILS A NEW TURBOCHARGED ROTAX AIRCRAFT ENGINE. Rotax-Owner. 22 July 2015.
    3. Web site: Rotax Updates 915iS Progress. AVweb. 6 April 2016. 7 April 2016.
    4. Web site: AVweb's Stuff of the Year. AVweb. 29 December 2015. 2 January 2016.
    5. Web site: Rotax 915iS Sport Moves Closer To Market. AVweb. 26 July 2016. 28 July 2016.
    6. Web site: Type Certificate Data Sheet No, E.121 for Piston Engines Rotax 912 series . 31 January 2019. European Aviation Safety Agency. www.easa.europa.eu. 4 January 2018.
    7. Web site: Rotax Introduces 24V Option For 915iS. 24 December 2021. O'Connor. Kate. AVweb. 22 December 2021. https://archive.today/20211224125952/https://www.avweb.com/ownership/engines/rotax-introduces-24v-option-for-915is/?MailingID=799&utm_source=ActiveCampaign&utm_medium=email&utm_content=FAA+To+Investigate+Santa+Clara+Safety+Concerns,+Appareo+Systems+Acquired+By+Global+Agricultural+Firm&utm_campaign=FAA+To+Investigate+Santa+Clara+Safety+Concerns,+Appareo+Systems+Acquired+By+Global+Agricultural+Firm+-+FRIDAY,+December+24,+2021. 24 December 2021. live.

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