![]() The disagreement came to light in recent days in Paris. GE has been heavily promoting its open-fan engine concept, which CFM International is developing under its Revolutionary Innovation for Sustainable Engines (RISE) demonstrator programme. GE and Safran Aircraft Engines jointly own CFM. Speaking on 18 June, Deal said GE’s 20% target is based on an stand-alone engine, not a powerplant integrated on to an aircraft. “There is always a knock-down effect to get to pure fuel burn.” Every engine runs better uninstalled than installed,” Deal says. He declines to specify Boeing’s efficiency estimate for an open-fan engine but makes clear the company has not picked an propulsion design for its future aircraft. “We haven’t selected an engine,” Deal says. ![]() Conventional engines continue as another option.”ĭeal says Boeing is pursuing various technologies that, taken together, could help its next aircraft be 20% more fuel efficient, including a truss-braced wing and greater use of composite materials.īoeing is widely expected to bring its next aircraft, a 737 replacement, to market in the 2030s. ![]() GE vice-president of engineering Mohamed Ali, however, insists an open-fan architecture will be capable of hitting the 20% target even when installed. Such engines allow for significantly wider fans and, hence, higher bypass ratios, without the drag and weight penalties imposed by nacelles.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |