Next-generation innovation

Developed under the U.S. Department of Defense’s Adaptive Versatile Engine Technology (ADVENT) and Adaptive Engine Technology Development (AETD) programs, the GE Adaptive Cycle Engine is the only engine that combines outstanding fuel burn with increased, fighter-level thrust, enabling next-generation military combat aircraft to go greater distances and engage more targets.

In 1995, the GE90 engine debuted aboard a British Airways 777 airplane along with commercial aviation’s first-ever carbon-fiber composite fan blades. Early GE90 engine models boasted outputs between 74,000 and 94,000 lbs. of thrust, and today it remains the world’s largest turbofan engine.

GE has continued to improve upon the GE90 design with larger variants (-110B and -115B) built exclusively for Boeing’s largest 777 models (777-200LR and 777-300ER). The GE90 is now the best-selling engine for that aircraft family.

Are planes gearless? originally appeared on Quora: the place to gain and share knowledge, empowering people to learn from others and better understand the world.

Answer by Joe Shelton, Author, Pilot, on Quora:

I’m assuming when you ask if “planes are gearless” you’re really asking do aircraft have multi-gear transmissions like cars?

None that I know of.

But many aircraft engines are geared to slow the engine RPMs down such that the propellers operate at an efficient RPM. Turboprops for example.