GE Aircraft Engine's GE90-115B engine powers the 777-300ER. Each engine produces 115,000 pounds of thrust -- nearly a quarter of a million pounds of total thrust for the airplane. By comparison, the original 777 had 75,000 pounds of thrust per engine. GE90-115B engines have been recognized as the world's most powerful commercial jet engines and currently hold a Guinness World Record for thrust. All three types of engines offered on the 777 have excellent fuel efficiency, allowing the 777 to be as quiet as a 767 even though the 777 engines provide 40 percent more power. Key factors in this performance are new, larger-diameter fans with wide-chord fan blade designs and bypass ratios ranging from 6-to-1 to as high as 9-to-1. This compares to the typical 5-to-1 ratio for the engines of previous twin-aisle jets.