CFM RISE engine

Cleared Direct Oct 20, 2026

The CFM RISE Open Fan Engine, the Return of the Propfan, and Why GE and Safran Think They Can Finally Solve the Problem That Beat Them in the Nineteen Eighties

CFM International's RISE program targets 20%-plus fuel efficiency over today's LEAP engines by removing the nacelle and exposing fan blades - a concept the 1980s couldn't close out, now back with better physics support.

Vector

Cleared Direct Oct 13, 2026

The CFM RISE Open Fan Engine, the Unducted Rotor GE Abandoned in the Nineteen Eighties, and the Engineering Bet That Could Rewrite Commercial Aviation Efficiency in the Twenty Thirties

CFM International's RISE program is developing an open fan engine targeting 20% better fuel burn than current turbofans, with entry into service projected for the mid-2030s.

Vector

Cleared Direct Oct 1, 2026

The CFM RISE Open-Fan Engine, the Unducted Fan That Came Within a Decade of Production in the Nineteen Eighties, and the Architectural Bet That Could Rewrite Commercial Aviation's Fuel Equation for the Next Half Century

CFM International's RISE program is developing an open-fan engine targeting over 20% better fuel efficiency than the LEAP, with entry into service aimed at the mid-2030s.

Vector

Cleared Direct Sep 17, 2026

The CFM RISE Open Fan Engine, the Return of the Unducted Rotor, and the Twenty Percent Fuel Burn Promise That Could Define the Next Generation of Commercial Jets

CFM International's RISE open fan engine targets 20%+ fuel savings over the LEAP by eliminating the nacelle - with service entry projected for the mid-2030s.

Vector

Cleared Direct Sep 3, 2026

The CFM RISE Open Fan Engine, the Return of the Propfan, and the Forty-Year-Old Idea That Could Reshape Every Narrowbody in the Sky

CFM International's RISE program is reviving the open fan engine with modern materials and AI design tools that could deliver 20%+ fuel savings for the next narrowbody generation.

Vector

Cleared Direct Apr 23, 2026

The CFM RISE open-fan engine and the twenty percent fuel burn revolution coming to airliners by twenty thirty-five

CFM International's RISE open-fan engine targets a 20% fuel burn reduction over current LEAP engines, with entry into service around 2035.

Vector