CFM International RISE

The CFM International RISE ("Revolutionary Innovation for Sustainable Engines") is an open rotor engine currently under development by CFM International, a 50–50 joint venture between American GE Aviation and French Safran Aircraft Engines. The engine is planned to support both hydrogen and sustainable aviation fuels, and it plans to achieve a 20% reduction in fuel burn and in carbon dioxide emissions compared to its predecessors.[1][2][3]

RISE
Type Open rotor engine
National origin France and United States
Manufacturer CFM International
Status In development

Design and development

Background

The 1973 oil crisis increased oil prices in the 1970s, which caused engine manufacturers to research new technologies to reduce fuel burn, including open rotor (also known as propfan) engines. However, none of those designs made into production aircraft, mostly due to decreasing oil prices and concerns over the high noise footprint of those engines.[4][5][6]

Both Safran and GE Aviation had experimented with open rotor based engine designs in the years before the RISE project was announced. Safran had performed ground tests for an open rotor engine in 2019 as a part of the European Union's Clean Sky project, while GE had performed wind tunnel tests on a derivative of the GE36 engine at the start of the 2010s in collaboration with the Federal Aviation Administration.[1][6]

Development

CFM International announced the RISE program in June 2021 as an intended successor of the CFM LEAP 1 turbofan engine, with plans to enter service in the mid-2030s. At the 2022 Farnborough Airshow in July of that year, CFM International and Airbus announced plans to start flight tests for the RISE engine on an Airbus A380-based testbed in 2026.[7][8]

See also

Related development

Related lists

References
  1. Norris, Guy (June 14, 2021). "CFM Unveils 'Open Fan' Demonstrator Plan For Next-Gen Engine". Aviation Week Network. Retrieved February 26, 2023.
  2. Huston, John (June 17, 2022). "Boeing Keeps an "Open Mind" on RISE Engine Technology". Airways Magazine. Retrieved February 26, 2023.
  3. Gates, Dominic (June 15, 2021). "'Open Rotor' engine for sustainable aviation". techxplore.com. Retrieved February 28, 2023.
  4. "The Short, Happy Life of the Prop-fan". Smithsonian Magazine. Retrieved February 28, 2023.
  5. Georgilidakis, Spyros (February 27, 2021). "Safran Open Rotor – The Next Engine Design Leap?". Mentour Pilot. Retrieved February 28, 2023.
  6. Fehrm, Bjorn (January 3, 2020). "Bjorn's Corner: Why e in ePlane shall stand for environment, Part 3. Open rotor revisited". Leeham News and Analysis. Retrieved February 28, 2023.
  7. Fehrm, Bjorn (June 14, 2021). "CFM announces the RISE engine program". Leeham News and Analysis. Retrieved February 26, 2023.
  8. Norris, Guy (July 19, 2022). "Airbus To Flight-Test CFM RISE Open Rotor". Aviation Week Network. Retrieved February 26, 2023.
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