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CFM’s RISE open-fan program posts new milestones as full-size hardware testing starts, targeting ~20% jet-fuel burn

CFM International says its Revolutionary Innovation for Sustainable Engines (RISE) open-fan engine has notched further design and test progress, with CFM ready to begin full-size hardware testing of its casing-less configuration. The announcement followed a Farnborough pre-event update highlighting additional RISE successes and CFM’s continued confidence in open-fan technology’s pathway to fuel reduction.

Discovered 2026-07-18T22:21:02.934167-07:00 | 2026-07-18T22:21:02.934167-07:00

Briefing

What Hype is tracking

CFM is moving from development milestones into full-size open-fan hardware testing, tightening the link between announced technology progress and the evidence regulators and customers will require.
The cluster ties RISE progress to a stated performance goal (about a 20% jet-fuel cut) and frames momentum around the program’s readiness for the next validation phase.
The Farnborough-linked updates also reference GE Aerospace’s GEnx-1B reaching 50 million flight hours at a record pace, underscoring how OEM operating data can influence credibility for next-generation engine risk and timelines.

Reported By

GE Aerospace interestingengineering.com AeroTime AINonline Aviation Week aerotelegraph.com