DoinTime
Well-known member
- Joined
- Nov 27, 2001
- Posts
- 2,523
Okay so I clicked on the link. Here is what I found:
The Pratt & Whitney Geared Turbofan engine represents a step-change in commercial engine performance for single-aisle aircraft. The expected benefits will include up to a 12 percent improvement in fuel efficiency and a 30-decibel noise reduction over Stage III requirements. A ground demonstration test is planned in the third quarter 2007 and a flight demonstration test in 2008.
So which is it?
That quote relates only to the performance of the engine. Airframe improvements will likely yield further improvements. If the comparisons are to Boeing 737-500, and 717-200's there is a lot efficiency to gained through a lighter weight airframe and improved aerodynamics. The days of making airframes to last 40 years are gone.