open fan engine

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.

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Cleared Direct Oct 7, 2026

The CFM RISE Program, the Counter-Rotating Open Fan, and the Thermodynamic Bet That Could Redefine Every Narrowbody Flying in the Twenty Thirties

CFM's RISE program is developing a counter-rotating open fan engine targeting 20%+ fuel burn improvement over current LEAP engines, with entry into service targeted for the mid-2030s.

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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.

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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 17, 2026

The CFM RISE Program, the Open Fan Architecture, and the Twenty Percent Fuel Burn Promise That Could Define the Next Generation of Narrowbody Aviation

CFM International's RISE program is developing an open fan engine architecture targeting 20% better fuel efficiency than today's LEAP, with entry into service projected for the late 2030s.

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Cleared Direct Sep 10, 2026

The CFM RISE Program, the Open Fan Engine, and the Propfan Gamble That Could Power the Next Generation of Narrow-Body Airliners

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

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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 Aug 29, 2026

The CFM RISE Program, the Open Fan Engine, and the Physics of Removing the Nacelle

CFM International's RISE program targets more than 20% better fuel burn by eliminating the nacelle entirely, marking the most fundamental rethink of commercial jet propulsion in decades.

Vector

Cleared Direct Aug 24, 2026

The CFM RISE Open Fan, the Unducted Engine With No Cowling, and the Twenty Percent Fuel Bet That Could Reshape the Single-Aisle Jet

Radio Hangar explores The CFM RISE Open Fan, the Unducted Engine With No Cowling, and the Twenty Percent Fuel Bet That Could Reshape the Single-Aisle Jet.

Vector

Cleared Direct Aug 21, 2026

The CFM RISE Open Fan, the Engine With No Cowling, and the Bet That the Ducted Turbofan Has Hit Its Limit

CFM's RISE open fan ditches the engine cowling to cut fuel burn 20%, betting the ducted turbofan has hit its efficiency ceiling.

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Cleared Direct Aug 17, 2026

The CFM RISE Open Fan, the Unducted Engine With Blades You Can See, and the Bet That the Next Big Jump in Fuel Burn Means Taking the Cowling Off

CFM's RISE open fan engine ditches the cowling to cut fuel burn 20% versus today's LEAP, with flight tests due around 2027-2028.

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Cleared Direct Aug 11, 2026

The CFM RISE Open Fan, the Unducted Engine Aviation Tried and Abandoned in the Eighties, and the Twenty Percent Fuel Bet Coming Back to the Single-Aisle Jet

CFM's RISE open fan engine promises 20% better fuel burn and could power the next single-aisle jet around 2035.

Vector

Cleared Direct Aug 11, 2026

The Open Fan, CFM's RISE Program, and the Engine With No Cowling That Wants to Cut Airline Fuel Burn by Twenty Percent

Radio Hangar explores The Open Fan, CFM's RISE Program, and the Engine With No Cowling That Wants to Cut Airline Fuel Burn by Twenty Percent.

Vector

Cleared Direct Aug 6, 2026

CFM RISE, the Open Fan Engine With No Cowling, and the Twenty Percent Fuel Burn Bet on the Airplane That Replaces the Single-Aisle Jet

Radio Hangar explores CFM RISE, the Open Fan Engine With No Cowling, and the Twenty Percent Fuel Burn Bet on the Airplane That Replaces the Single-Aisle Jet.

Vector

Cleared Direct Aug 4, 2026

The CFM RISE Open Fan, the Uncowled Engine GE and Safran Are Betting Will Power the Next Narrowbody, and Why an Idea the 1980s Abandoned Is Back on the Test Stand

CFM's RISE open fan revives a 1980s design, targeting 20% less fuel burn for the next single-aisle jet, with service entry around 2035.

Vector

Cleared Direct Jul 29, 2026

The CFM RISE Open Fan, the Unducted Engine With No Cowl, and the Twenty Percent Fuel Burn Bet That Could Reshape the Single-Aisle Jet

CFM's RISE open fan engine ditches the cowl to chase 20% lower fuel burn on the next single-aisle jet - here's how it works and when it might fly.

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.

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