Inside the factory where Rolls-Royce produces one of the greenest jet engines ever made

British manufacturer Rolls-Royce lifted the lid on its shiny new factory for jet engines this week.

The Trent XWB engine will be used in Airbus' A350 XWB aircraft, and it's one of the quietest and fuel efficient jet engines ever produced. 

Rolls-Royce invited company executives, German officials, journalists, and photographers to the plant just outside Berlin for the unveiling and a tour of the facility. Here’s a look at how the efficient engines take shape:

The first thing you notice about the Trent XWB engine: it’s big. Really big. Just two of these will power a 240 ton plane into the sky with 84,000 pounds of thrust each.

Specifically, they’ll be powering Airbus A350X WB (extra wide body), one of the French plane maker's most in-demand models.

Here’s what the engine looks like up close when installed under the wing.