narrowbody propulsion

Cleared Direct Nov 6, 2026

The CFM RISE Open Fan Engine, the Counter-Rotating Blades GE Aerospace and Safran Are Building to Replace the LEAP, and the Propulsion Math Behind a Twenty Percent Fuel Burn Reduction

CFM International's RISE program targets a 20% fuel burn reduction over the LEAP engine using an exposed, counter-rotating open fan architecture with a ~60:1 bypass ratio, aiming for mid-2030s service entry.

Vector

Cleared Direct Nov 6, 2026

The CFM RISE Open Fan Engine, the Unducted Rotor That Could Cut Airliner Fuel Burn by More Than Twenty Percent, and What GE Aerospace and Safran Are Building for the Post-LEAP Generation

CFM International's RISE program is building an open fan engine targeting over 20% better fuel efficiency than the LEAP, aimed at single-aisle aircraft entering service in the mid-2030s.

Vector