The Rotax 916 iS is an Austrian piston

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

, designed and produced by

Rotax Rotax is the brand name for a range of internal combustion engines developed and manufactured by the Austrian company BRP-Rotax GmbH & Co KG (until 2016 BRP-Powertrain GmbH & Co. KG), in turn owned by the Canadian Bombardier Recreational Prod ...

Gunskirchen Gunskirchen is a town in the Austrian state of Upper Austria. Geography Gunskirchen lies in the Hausruckviertel. About 11 percent of the municipality is forest, and 78 percent is farmland. Internal combustion engine maker Rotax has been headquarte ...

for use in

light aircraft A light aircraft is an aircraft that has a Maximum Takeoff Weight, maximum gross takeoff weight of or less.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 308. Aviation Supplies & Academics, 1997. Light aircraft are use ...

, light sport,

ultralight Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with aile ...

homebuilt aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...

and

Unmanned aerial vehicle An unmanned aerial vehicle (UAV) or unmanned aircraft system (UAS), commonly known as a drone, is an aircraft with no human pilot, crew, or passengers onboard, but rather is controlled remotely or is autonomous.De Gruyter Handbook of Dron ...

. The engine was publicly introduced in March 2023 and first used in the CubCrafters Carbon Cub UL.

Design and development

The engine is a

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

four-cylinder,

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

horizontally-opposed A flat engine is a piston engine where the cylinders are located on either side of a central crankshaft. Flat engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, ...

, displacement, gasoline engine design, with a mechanical gearbox

reduction drive A reduction drive is a mechanical device to shift rotational speed. A planetary reduction drive is a small scale version using ball bearings in an epicyclic arrangement instead of toothed gears. Reduction drives are used in engines of all kinds ...

with a reduction ratio of 2.54:1. It employs dual

electronic ignition Ignition systems are used by heat engines to initiate combustion by igniting the fuel-air mixture. In a spark ignition versions of the internal combustion engine (such as petrol engines), the ignition system creates a spark to ignite the fuel-air ...

and produces at 5800 rpm for takeoff and at 5500 rpm continuous operation, with a maximum operating altitude of . It has electronic fuel injection; air cooling, with liquid-cooled cylinder heads; a

stainless steel Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy that contains chromium, making it resistant to rust and corrosion. Stainless steel's resistance to corrosion comes from its chromi ...

exhaust system; a dry sump, forced lubrication system with a separate oil tank;

FADEC A full authority digital engine (or electronics) control (FADEC) is a system consisting of a digital computer, called an "electronic engine controller" (EEC) or " engine control unit" (ECU), and its related accessories that control all aspects of a ...

control and a 12 volt or 24 volt electric starter. The initial

time between overhaul Time between overhauls (abbreviated as TBO or TBOH) is the manufacturer's recommended number of running hours or calendar time before an aircraft engine or other component requires overhaul. On rotorcraft, many components have recommended or ma ...

is 2,000 hours.

Operational history

The Rotax 916 iS was chosen to power the CubCrafters Carbon Cub UL due to the engine's light weight and ability to burn unleaded automotive

gasoline Gasoline ( North American English) or petrol ( Commonwealth English) is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. When for ...

, to facilitate exports to areas of the globe where

avgas Avgas (aviation gasoline, also known as aviation spirit in the United Kingdom, UK) is an aviation fuel used in aircraft with spark-ignited internal combustion engines. ''Avgas'' is distinguished from conventional gasoline (petrol) used in moto ...

is not available, such as South America and Africa.

Cub Crafters Cub Crafters, Inc. (styled CubCrafters) is an aircraft manufacturer based in Yakima, Washington. History The company was founded in 1980 by Jim Richmond to build parts and supplementary type certificate (STC) modifications for the Piper PA-18 ...

said of the engine that the "key to the development of the new aircraft is CubCrafters’ collaboration with BRP-Rotax, which is launching their new 160 HP turbocharged engine on the Carbon Cub UL. The new 916 iS engine is lighter, more fuel efficient, and can produce more power than the normally aspirated CC340 engine on the Carbon Cub SS in higher density altitude scenarios."

Applications

* CubCrafters Carbon Cub UL *Zlin Aviation Norden UL and LSA *

Elbit Hermes 900 The Elbit Systems Hermes 900 ''Kochav'' ("Star") is an Israeli medium-size, multi-payload, medium-altitude long-endurance unmanned aerial vehicle (UAV) designed for tactical missions. It is a successor to the Hermes 450 series of drones, one o ...

Design and development

Operational history

Applications

Specifications (916 iS)

See also

References

External links