Rotax 915 iS

Rotax 915 iS
Type	Aircraft engine
National origin	Austria
Manufacturer	Rotax
First run	2014
Major applications	Issoire APM 41 Simba 915iS
Produced	Expected second half of 2017
Number built	Prototypes only (2015)

The Rotax 915 iS is an Austrian aircraft engine, under development by Rotax of Gunskirchen for use in ultralight aircraft, homebuilt aircraft, light-sport aircraft, small helicopters and gyroplanes. The intention is that the engine will eventually be type certified.

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

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

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 15,000 ft (4,572 m). It employs dual electronically controlled fuel injection, using dual channel Rockwell Collins ECUs, with dual ignition and produces 135 hp (101 kW).

The engine is based on the Rotax 912, but differs in that it has a reinforced crankshaft, new pistons, a new gearbox and a turbocharger. Time between overhauls is expected to be 2000 hours from introduction.

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).

Availability is expected for second half of 2017.

Data from AVweb and manufacturer's website

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