aviation fuel efficiency

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 16, 2026

The NASA X-66A, the Transonic Truss-Braced Wing, and the Thirty Percent Fuel Burn Promise That Could Reshape Every Commercial Jet Flying After Twenty-Thirty-Five

NASA and Boeing's X-66A demonstrator targets a 30% fuel burn reduction using a high-aspect-ratio truss-braced wing that could reshape commercial jets after 2035.

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 Aug 3, 2026

JetZero's Blended Wing Body, the Z-Four Demonstrator, and Why Burying the Cabin Inside the Wing Buys You Half the Fuel but Fights Everything We Know About Boarding and Evacuating an Airliner

JetZero's blended wing body promises half the fuel burn, but pressurization and 90-second evacuation are the real obstacles to a flying airliner.

Vector

Cleared Direct Aug 1, 2026

JetZero, the Blended Wing Body, and the Fifty-Percent Fuel Cut That Boeing Sketched for Sixty Years but Never Built

JetZero's blended wing body aims to cut airliner fuel burn up to 50% - here's whether the claim and timeline hold up.

Vector