Hi My Friends: A VUELO DE UN QUINDE EL BLOG., The aircraft, designed by The Boeing Co. and built by Cranfield
Aerospace Limited of the United Kingdom, is flying again in partnership
with NASA. The new X-48C model, which was formerly the X-48B Blended
Wing Body aircraft, was modified to evaluate the low-speed stability and
control of a low-noise version of a notional, future Hybrid Wing Body
(HWB) aircraft design. The HWB design stems from concept studies being
conducted by NASA's Environmentally Responsible Aviation project of
future potential aircraft designs 20 years from now.
Variation on a Theme
Boeing's advanced vehicle concept
centers around the familiar blended wing body design like the X-48. What
makes this design different is the placement of its Pratt & Whitney
geared turbofan engines on the top of the plane's back end, flanked by
two vertical tails to shield people on the ground from engine noise. The
design also uses other technologies to reduce noise and drag, and
long-span wings to improve fuel efficiency.
This design is among those presented to NASA at the end of 2011 by
companies that conducted NASA-funded studies into aircraft that could
enter service in 2025.
Image credit: NASA/Boeing
› Read More About These Designs
Image credit: NASA/Boeing
› Read More About These Designs
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New Ideas for Greener Aircraft
Three industry teams spent 2011 studying how to meet NASA's goals for making future aircraft burn 50 percent less fuel than aircraft that entered service in 1998, emit 75 percent fewer harmful emissions; and shrink the size of geographic areas affected by objectionable airport noise by 83 percent.Image credit: NASA
Back in the Air: X-48B Resumes Flight Tests at NASA Dryden
09.21.10
(NASA / Tony Landis)
After undergoing a major overhaul and upgrades, the Boeing / NASA X-48B
Blended Wing Body research aircraft resumed flight tests with a checkout
flight Sept. 21 from NASA's Dryden Flight Research Center at Edwards
Air Force Base, Calif.The subscale, manta ray-shaped, remotely piloted airplane, also called a hybrid wing body, is a tool of NASA's new Environmentally Responsible Aviation, or ERA, project. ERA aims to develop the technology needed to create quieter, cleaner, and more fuel-efficient airplanes for the future.
After completion of its first phase of flight testing, the airplane was disassembled for a complete inspection and refurbishment. This new series of flight tests will focus on additional parameter identification investigations following installation and checkout of a new flight computer. The parameter identification work will evaluate the new computer’s control of the aircraft’s flight control surfaces and the airplane's performance.
(NASA / Carla Thomas)
In addition to NASA and Boeing, the X-48B team includes Cranfield
Aerospace Ltd. in the United Kingdom, and the U.S. Air Force Research
Laboratory in Dayton, Ohio.The team completed the 80th and last flight of the project's first phase on March 19, 2010, almost three years after the X-48B's first flight on July 20, 2007.
Gray Creech NASA Dryden public affairs
Transformed X-48c Flies Successfully
Edwards
AFB, Calif. -- The remotely piloted X-48C aircraft successfully flew
for the first time Tuesday at Edwards Air Force Base in California's
Mojave Desert.
The aircraft, designed by The Boeing Co. and built by Cranfield Aerospace Limited of the United Kingdom, is flying again in partnership with NASA. The new X-48C model, which was formerly the X-48B Blended Wing Body aircraft, was modified to evaluate the low-speed stability and control of a low-noise version of a notional, future Hybrid Wing Body (HWB) aircraft design. The HWB design stems from concept studies being conducted by NASA's Environmentally Responsible Aviation project of future potential aircraft designs 20 years from now.
"We are thrilled to get back in the air to start collecting data in this low-noise configuration," said Heather Maliska, X-48C project manager at NASA's Dryden Flight Research Center. "Our dedicated team has worked hard to get the X-48C off the ground for its first flight and we are excited learning about the stability and control characteristics of this low-noise configuration of the blended wing body."
Primary changes to the C model from the B model, which flew 92 flights at Dryden between 2007 and 2010, were geared to transforming it to an airframe noise-shielding configuration. External modifications included relocating the wingtip winglets inboard next to the engines, effectively turning them into twin tails. The aft deck of the aircraft was extended about 2 feet to the rear. Finally, the project team replaced the X-48B's three 50-pound thrust jet engines with two 89-pound thrust engines.
Because handling qualities of the X-48C will be different from those of the X-48B, the project team developed flight control system software modifications, including flight control limiters to keep the airplane flying within a safe flight envelope. This will enable a stronger and safer prototype flight control system suitable for future full-scale commercial hybrid or blended wing aircraft.
"We are very pleased to begin flight tests of the X-48C," said Mike Kisska, Boeing X-48C project manager. "Working with NASA, we've successfully passed another milestone in our work to explore and validate the aerodynamic characteristics and efficiencies of the blended wing body concept."
Additionally, the upc
oming flight experiments with the X-48C will help researchers further develop methods to validate the design's aerodynamics and control laws, including a goal of reducing aerodynamic drag through engine yaw control tests.
During the planned second block of flight testing this fall, NASA will test engine yaw control software incorporated in the X-48C's flight computer. This research will use asymmetric engine thrust to create yaw, or nose left or right movements, for trim and for relatively slow maneuvers.
NASA's Aeronautics Research Mission Directorate and Boeing are funding the X-48 technology demonstration research effort, which supports NASA's goals of reduced fuel burn, emissions and noise.
The X-48C retains most dimensions of the B model, with a wingspan just longer than 20 feet, and a weight of about 500 pounds. The aircraft has an estimated top speed of about 140 mph, and a maximum altitude of 10,000 feet.
The Air Force Research Laboratory, Dayton, Ohio, also is a member of the project team.
For more information about the Aeronautics Research Mission Directorate, visit:
The aircraft, designed by The Boeing Co. and built by Cranfield Aerospace Limited of the United Kingdom, is flying again in partnership with NASA. The new X-48C model, which was formerly the X-48B Blended Wing Body aircraft, was modified to evaluate the low-speed stability and control of a low-noise version of a notional, future Hybrid Wing Body (HWB) aircraft design. The HWB design stems from concept studies being conducted by NASA's Environmentally Responsible Aviation project of future potential aircraft designs 20 years from now.
"We are thrilled to get back in the air to start collecting data in this low-noise configuration," said Heather Maliska, X-48C project manager at NASA's Dryden Flight Research Center. "Our dedicated team has worked hard to get the X-48C off the ground for its first flight and we are excited learning about the stability and control characteristics of this low-noise configuration of the blended wing body."
Primary changes to the C model from the B model, which flew 92 flights at Dryden between 2007 and 2010, were geared to transforming it to an airframe noise-shielding configuration. External modifications included relocating the wingtip winglets inboard next to the engines, effectively turning them into twin tails. The aft deck of the aircraft was extended about 2 feet to the rear. Finally, the project team replaced the X-48B's three 50-pound thrust jet engines with two 89-pound thrust engines.
Because handling qualities of the X-48C will be different from those of the X-48B, the project team developed flight control system software modifications, including flight control limiters to keep the airplane flying within a safe flight envelope. This will enable a stronger and safer prototype flight control system suitable for future full-scale commercial hybrid or blended wing aircraft.
"We are very pleased to begin flight tests of the X-48C," said Mike Kisska, Boeing X-48C project manager. "Working with NASA, we've successfully passed another milestone in our work to explore and validate the aerodynamic characteristics and efficiencies of the blended wing body concept."
Additionally, the upc
oming flight experiments with the X-48C will help researchers further develop methods to validate the design's aerodynamics and control laws, including a goal of reducing aerodynamic drag through engine yaw control tests.
During the planned second block of flight testing this fall, NASA will test engine yaw control software incorporated in the X-48C's flight computer. This research will use asymmetric engine thrust to create yaw, or nose left or right movements, for trim and for relatively slow maneuvers.
NASA's Aeronautics Research Mission Directorate and Boeing are funding the X-48 technology demonstration research effort, which supports NASA's goals of reduced fuel burn, emissions and noise.
The X-48C retains most dimensions of the B model, with a wingspan just longer than 20 feet, and a weight of about 500 pounds. The aircraft has an estimated top speed of about 140 mph, and a maximum altitude of 10,000 feet.
The Air Force Research Laboratory, Dayton, Ohio, also is a member of the project team.
For more information about the Aeronautics Research Mission Directorate, visit:
http://www.aeronautics.nasa.gov
NASA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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