Rolls Royce has started construction of the world’s largest turbofan engine, called UltraFan. The 140-inch diameter fan of the engine is not only a record, but will help the engine achieve a 25 percent lower fuel burn than existing designs of similar thrust. Reduction gearing keeps blade tip velocities manageable and advanced digital twin technology tracks the history of each blade.NASA’s Space Shuttle Main Engines were state of the art thirty years ago, and today, they’re the basis for the upgraded power plants that will lift the Space Launch System to the moon. Modern technology at Aerojet Rocketdyne has reduced the manufacturing cost of the engines by 30 percent while increasing power.Additive manufacturing is making bigger and bigger parts today and SAFRAN has built an entire jet nose landing gear rough casting using an SLM process in titanium powder. The big part is 15 percent lighter than conventional forging and promises to change the way this critical part is made in the future.Access all episodes of This Week in Engineering on Engineering TV along with all of our other series.