# Rotax 915 iS > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Rotax_915_iS > Markdown URL: https://mediated.wiki/source/Rotax_915_iS.md > Source: https://en.wikipedia.org/wiki/Rotax_915_iS > Source revision: 1350187719 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Austrian aircraft engine Rotax 915 iS Type Piston aircraft engine National origin Austria Manufacturer Rotax First run 2014 Major applications Issoire APM 41 Simba 915iS Manufactured 2017–present[1] Developed from Rotax 912 Variants Rotax 916 iS The **Rotax 915 iS** is an [Austrian](/source/Austria) [aircraft engine](/source/Aircraft_engine), produced by [Rotax](/source/Rotax) of [Gunskirchen](/source/Gunskirchen) for use in [ultralight aircraft](/source/Ultralight_aircraft), [homebuilt aircraft](/source/Homebuilt_aircraft), [light-sport aircraft](/source/Light-sport_aircraft), small [helicopters](/source/Helicopters) and [gyroplanes](/source/Gyroplane). The engine was [type certified](/source/Type_certificate) in 2017.[2][3] The engine was first publicly displayed at [AirVenture](/source/AirVenture) in July 2015[2] and first flown in March 2016.[4] In January 2016 the engine was named AVweb's "Best New Engine" of 2015.[5] ## Design and development The Rotax 915 iS is a four-cylinder [four-stroke](/source/Four-stroke), [horizontally-opposed](/source/Horizontally-opposed), [turbocharged](/source/Turbocharged), air and liquid-cooled, gasoline engine design, with a mechanical gearbox [reduction drive](/source/Reduction_drive). The turbocharger has a compression ratio of 3.5:1 and the engine will have a critical altitude of 15,000 ft (4,572 m). It employs dual electronically controlled fuel injection, using dual channel [Rockwell Collins](/source/Rockwell_Collins) ECUs, with dual ignition and produces 141 hp (105 kW) for take-off and 135 hp (101 kW) continuous. The engine can produce rated power up to 15,000 ft (4,572 m) and has a ceiling of 23,000 ft (7,010 m).[1][2][6] The engine is based on the [Rotax 912](/source/Rotax_912), but differs in that it has fuel injection, a reinforced crankshaft, new pistons, a new gearbox and a turbocharger. [Time between overhauls](/source/Time_between_overhaul) was expected to eventually be raised to 2000 hours with operational experience, but started at 1200 hours.[2][6][1] The design entered production in the second half of 2017. The [European Aviation Safety Agency](/source/European_Aviation_Safety_Agency) certified the Rotax 915 iSc3 A on 14 December 2017 and the Rotax 915 iSc3 B on 4 January 2018.[7] 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.[8] ## Variants **Rotax 915iS** - Base version with a 12V electrical system **Rotax 915iS C24** - Non-certified model with 24V electrical system[8] **Rotax 915iSc C24** - Certified model with 24V electrical system[8] ## Applications - [Pro.Mecc Freccia Anemo](/source/Pro.Mecc_Freccia_Anemo) - [Blackshape Prime](/source/Blackshape_Prime) - [Horizontec Halcón 2.1](/source/Horizontec_Halc%C3%B3n) - [Issoire APM 41 Simba 915iS](/source/Issoire_APM_40_Simba) - [Progressive Aerodyne SeaRey](/source/Progressive_Aerodyne_SeaRey) - [Sling Aircraft Sling TSi](/source/Sling_Aircraft_Sling_TSi) - [Swiss Excellence Risen](/source/Swiss_Excellence_Risen) - [Flying Legend Tucano Replica](/source/Flying_Legend_Tucano_Replica) - [Bristell B23-915 Turbo](https://www.bristell.com/bristell-b23-turbo/) - [TL Sparker](https://www.tlsportaircraft.com/sparker/) - [TL Stream](https://www.tlsportaircraft.com/stream/) ## Specifications (915 iS) *Data from* AVweb[2] and manufacturer's website[1] ### General characteristics - **Type:** four-cylinder, four-stroke, horizontally-opposed, geared aircraft engine - **[Bore](/source/Bore_(engine)):** 84.0 mm (3.3 in) - **[Stroke](/source/Stroke_(engine)):** 61.0 mm (2.4 in) - **[Displacement](/source/Engine_displacement):** 1,352 cc (82.5 cu in) - **[Dry weight](/source/Dry_weight):** 84.6 kg (186.5 lb) dry ### Components - **[Turbocharger](/source/Turbocharger):** with a compression ratio of 3.5:1 - **Fuel system:** dual channel [Rockwell Collins](/source/Rockwell_Collins) ECUs - **Fuel type:** high-octane automotive gasoline - **Cooling system:** liquid and air - **[Reduction gear](/source/Propeller_speed_reduction_unit):** mechanical gear type ### Performance - **Power output:** 141 hp (105 kW) for take-off, 135 hp (101 kW) continuous - **[Specific fuel consumption](/source/Brake_specific_fuel_consumption):** 280–310 [g](/source/Gram)/([kW](/source/Kilowatt)·[h](/source/Hour)) at 5,500 rpm - **[Power-to-weight ratio](/source/Power-to-weight_ratio):** 0.73 hp/lb (1.19 kW/kg) ## See also **Related lists** - [List of aircraft engines](/source/List_of_aircraft_engines) ## References 1. ^ [***a***](#cite_ref-flyrotax.com_1-0) [***b***](#cite_ref-flyrotax.com_1-1) [***c***](#cite_ref-flyrotax.com_1-2) [***d***](#cite_ref-flyrotax.com_1-3) ["ROTAX 915 IS/ISC - Rotax Aircraft Engines"](https://www.flyrotax.com/produkte/detail/rotax-915-is-isc.html). *www.flyrotax.com*. Retrieved 31 January 2018. 1. ^ [***a***](#cite_ref-avweb.com_2-0) [***b***](#cite_ref-avweb.com_2-1) [***c***](#cite_ref-avweb.com_2-2) [***d***](#cite_ref-avweb.com_2-3) [***e***](#cite_ref-avweb.com_2-4) ["Rotax Announces New 135-hp Turbocharged Engine"](http://www.avweb.com/avwebflash/news/Rotax-Announces-New-135-hp-Turbocharged-Engine-224487-1.html). *AVweb*. 21 July 2015. Retrieved 22 July 2015. 1. **[^](#cite_ref-3)** ["Rotax-Owner.com - ROTAX 915 IS: BRP UNVEILS A NEW TURBOCHARGED ROTAX AIRCRAFT ENGINE"](https://www.rotax-owner.com/en/rotax-blog/item/43-915is). *Rotax-Owner*. Retrieved 22 July 2015. 1. **[^](#cite_ref-4)** ["Rotax Updates 915iS Progress"](http://www.avweb.com/avwebflash/news/Rotax-Updates-915iS-Progress-225991-1.html). *AVweb*. 6 April 2016. Retrieved 7 April 2016. 1. **[^](#cite_ref-5)** ["AVweb's Stuff of the Year"](http://www.avweb.com/blogs/insider/AVwebs-Stuff-of-the-Year-225403-1.html). *AVweb*. 29 December 2015. Retrieved 2 January 2016. 1. ^ [***a***](#cite_ref-avweb.com1_6-0) [***b***](#cite_ref-avweb.com1_6-1) ["Rotax 915iS Sport Moves Closer To Market"](http://www.avweb.com/avwebflash/news/Rotax-915iS-Sport-Moves-Closer-To-Market-226660-1.html). *AVweb*. 26 July 2016. Retrieved 28 July 2016. 1. **[^](#cite_ref-EASA_7-0)** [European Aviation Safety Agency](/source/European_Aviation_Safety_Agency) (4 January 2018). ["Type Certificate Data Sheet No, E.121 for Piston Engines Rotax 912 series"](https://www.easa.europa.eu/sites/default/files/dfu/TCDS_E%20121_Issue10_20180104_1.0.pdf) (PDF). *www.easa.europa.eu*. Retrieved 31 January 2019. 1. ^ [***a***](#cite_ref-OConnor22Dec21_8-0) [***b***](#cite_ref-OConnor22Dec21_8-1) [***c***](#cite_ref-OConnor22Dec21_8-2) O'Connor, Kate (22 December 2021). ["Rotax Introduces 24V Option For 915iS"](https://www.avweb.com/ownership/engines/rotax-introduces-24v-option-for-915is/). *AVweb*. Retrieved 24 December 2021.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service)) ## External links Wikimedia Commons has media related to [Rotax 915](https://commons.wikimedia.org/wiki/Category:Rotax_915). - [Official website](https://www.beachrayasia.com/product/rotax-915-i-141/) - [Video: Rotax Introduces the 915 iS](http://www.avweb.com/videos/Video-Rotax-Introduces-the-915-iS-224498-1.html) on AVweb 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 --- Adapted from the Wikipedia article [Rotax 915 iS](https://en.wikipedia.org/wiki/Rotax_915_iS) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Rotax_915_iS?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.