Engines
GE, Safran Launch Green Open-rotor Engine Development
The CFM Rise program aims to achieve a 20 percent improvement in fuel burn and emissions by 2035.
The CFM Rise program envisions a family of engines using a single open-rotor architecture. (Image: Safran)
The CFM Rise program envisions a family of engines using a single open-rotor architecture. (Image: Safran)

GE Aviation and Safran on Monday launched a technology demonstration and maturation program under their CFM joint venture for a family of open-rotor engines that would run on either 100 percent sustainable aviation fuel (SAF) or liquid hydrogen by the middle of the next decade. Called Rise (Revolutionary Innovation for Sustainable Engines), the development program aims for a 20 percent improvement in fuel burn and CO2 emissions compared with today’s CFM Leap family.