The Trent 1000 family makes extensive use of technology derived from the Trent 8104 demonstrator. In order to fulfill Boeing's requirement for a "more-electric" engine, the Trent 1000 is a bleedless design, with power take-off from the intermediate-pressure (IP) spool instead of the high-pressure (HP) spool found in other members of the Trent family. A m (110 in) diameter swept-back fan, with a smaller diameter hub to help maximize airflow, was specified. The bypass ratio has been increased over previous variants by suitable adjustments to the core flow.
Having said that, the marginal benefits are going to outweigh the marginal costs involved in making those investments, as the largest widebody segment of the market is at stake with 4,530 small twin-aisles with 200 to 300 seats being required in the next 20 years at US$ trillion. It is also a sizeable market in which Boeing is most likely to have a de facto monopoly, as the business case of Airbus A330s will become increasingly difficult to justify in light of stubbornly high fuel prices and mounting environmental awareness, with heavy discounts being unable to offset the 25% block fuel burn advantage since fuel accounts for as many as 35-40% of an aircraft’s cash operating cost (COC) these days. This is unlike the US$ trillion medium twin-aisle 300-400 seat market where Airbus fiercely competes in with its 314-seat A350-900 and 350-seat A350-1000 and let alone the 270-seat A350-800 shrunk variant is struggling with the worst overweight issue and is not an optimised platform at all.