A Boeing Next-Generation 737-800 in the new
United Airlines livery successfully completed its first test
flight late last week, signifying the start of certification for a
package of 737 performance improvements.
Testing and certification will continue through
April 2011. Aerodynamic and engine changes included in the package
are expected to reduce fuel consumption by 2%. Boeing is phasing
the changes into production mid-2011 through early 2012.
One percent of the savings comes from reducing resistance as air
flows around the airplane. The upper and lower anti-collision
lights change from round to a more aerodynamic, elongated teardrop
shape. Wheel-well fairings are re-contoured to smooth the air flow
near the main landing gear. A redesign of the environmental
control system, exhaust vent and streamlined wing slat and spoiler
trailing edges round out the aerodynamic changes.
CFM is
introducing the new CFM56-7BE engine enhancement program to
coincide with Boeing's airframe changes. Low and high-pressure
turbine modifications will result in a 1% reduction in fuel
consumption. In addition, Boeing is optimizing the engine's
primary nozzle and plug. Together, the changes result in
cooler-running engines that may provide up to 4% lower
maintenance costs.
Boeing's
continuous efforts to improve the Next-Generation 737 family have
resulted in an accumulated 5% gain in fuel efficiency since
the first airplane was delivered in 1998. The new improvements
will give operators an airplane that is 7% more efficient
than the first Next-Generation 737s delivered.
In late October,
Boeing delivered its first two Next-Generation 737-800s with the
new Boeing Sky Interior. The interior features new cove
lighting and curving architecture that create a more open feel in
the cabin. Updated sidewalls and window reveals add a modern feel,
and larger stowage bins enable passengers to store more luggage
while giving them more headroom.
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