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Tema: La Nasa lanza un prototipo de avión (X48C) capaz de ahorrar un 50% de combustible por su diseño.
- 11/03/2013, 23:07 #1
- 31 may, 07
La Nasa lanza un prototipo de avión (X48C) capaz de ahorrar un 50% de combustible por su diseño.
NASA's New X-48C Flying Wing Airplane Uses 50% Less Fuel Than Standard Aircraft
by Timon Singh, 01/25/13
filed under: green technology, Green Transportation, News
Researchers at NASA have developed a revolutionary flying wing aircraft that uses 50% less fuel than standard planes. The new manta ray-esque X-48C is based on the X-48B Blended Wing Body aircraft, which flew 92 flights at NASA Dryden between 2007 and 2010. The X-48C improves upon its predecessor with its low-noise, fuel-efficient hybrid wing body (HWB) design.
The X-48C uses an extremely efficient type of engine called an ultra-high bypass ratio engine, which the aero engineering teams at NASA say could use half as much fuel as conventional aircraft. Unfortunately, NASA program manager Fay Collier says that it may take eight to 10 years for the technology to be implemented into conventional aircraft.
The new technology can reduce the weight of an aircraft by 25%, but the flatter structure is much more difficult to build in a way that’s strong enough and light enough to be practical. Engineers are currently experimenting with preformed carbon composite rods to work around this hurdle.
The researchers are currently building a 30-foot-wide, two-level pressurized structure that will be used in an attempt to validate the manufacturing approach. That structure is scheduled to be finished by 2015.
Via Technology Review
X-48C: An X-Plane Transformer
The X-48C, transformed from the X-48B, recently took its first flight over the Mojave Desert in California. Image credit: NASA/Carla Thomas
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Changes to the X-48C from the X-48B include two engines instead of three, and wingtip winglets moved inboard next to the engines instead of on the wingtips.Image credit: NASA/Carla Thomas
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This image of the X-48B makes clear the differences between it and its successor.Image credit: Boeing/Robert Ferguson
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Though not an Autobot or Decepticon transformer in the popular movie series sense of the word, Boeing and NASA’s remotely piloted X-48C aircraft successfully flew for the first time on Aug. 7, 2012, from NASA’s Dryden Flight Research Center at Edwards Air Force Base in California's Mojave Desert.
The new X-48C model was transformed, or "modified" in engineering lingo, from the X-48B Blended Wing Body aircraft, which flew 92 flights at NASA Dryden between 2007 and 2010. The X-48C will be used 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.
Primary changes to the C-model from the B-model were geared to transform it to an airframe that does a better job shielding engine noise from the ground – a potential improvement for communities around airports. 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 also extended about two 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.
The X-48C retains most of the physical 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.
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.
Additionally, the upcoming 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 aircraft is designed by the Boeing Co. and built by Cranfield Aerospace Ltd. of the United Kingdom. The Air Force Research Laboratory, Dayton, Ohio, is also a member of the project team.
› Watch X-48C Flight Video
› Watch X-48B Flight Video
NASA Dryden Public Affairs"SPANAIR 1986-2012 , Una de las mejores aerolineas europeas de la historia "
"PLATAFORMA SALVEMOS CUATRO VIENTOS"
- 11/03/2013, 23:09 #2
¿Pero ese proyecto no tiene ya años? Me suena ver muchas imagenes de un trasto igual que ese, ademas, se dijo que a gran escala habría problemas para ponerle suficientes salidas de emergencia en una versión de pasajeros.Existen tres clases de personas: las que saben contar y las que no - Homer J. Simpson
- 11/03/2013, 23:21 #3
- 31 may, 07
No se aprecia mucho la diferencia pero lo estan normalizando, no obstante aun queda para rato para que algo de eso sea verdad, pero es bueno ver este tipo de avances.
Eso si me quedo con el prototipo de Airbus mucho mas realista y que podria ser bastante calcado al que exponen en su web."SPANAIR 1986-2012 , Una de las mejores aerolineas europeas de la historia "
"PLATAFORMA SALVEMOS CUATRO VIENTOS"
- 11/03/2013, 23:26 #4
- 12/03/2013, 07:39 #5
- 13 may, 08
- En las nubes
El proyecto es viejo, pero van probando nuevas configuraciones. La anterior era el B, la que están probando ahora es el X48C. Eso sí, la noticia es vieja o el periodista va desfasado, la noticia del paso de la configuraicon B a la C es de Agosto de 2012
CHICAGO, Aug. 7, 2012 /PRNewswire/ -- A modified Boeing (NYSE: BA) Blended Wing Body research aircraft – designated the X-48C – flew for the first time today at NASA's Dryden Flight Research Center at Edwards Air Force Base in California.
The remotely piloted X-48C aircraft took off at 7:56 a.m. Pacific Daylight Time and climbed to an altitude of 5,500 feet before landing 9 minutes later.
The X-48C is a scale model of a heavy-lift, subsonic vehicle that forgoes the conventional tube-and-wing airplane design in favor of a triangular aircraft that effectively merges the vehicle's wing and body. Boeing and NASA believe the BWB concept offers the potential over the long-term of significantly greater fuel efficiency and reduced noise.
"Working with NASA, we are very pleased to enter into the next flight-test phase of our work to explore and validate the aerodynamic characteristics and efficiencies of the Blended Wing Body concept," said Bob Liebeck, a Boeing Senior Technical Fellow and the company's BWB program manager.
"In our earlier flight testing of the X-48B, we proved that a BWB aircraft can be controlled as effectively as a conventional tube-and-wing aircraft during takeoffs and landings and other low-speed segments of the flight regime," Liebeck said. "With the X-48C, we will be evaluating the impact of noise shielding concepts on low-speed flight characteristics."
The X-48C is a modified version of the X-48B aircraft, which flew 92 times at NASA Dryden between 2007 and 2010. The X-48C is configured with two 89-pound thrust turbojet engines, instead of three 50-pound thrust engines on the B-model; and wingtip winglets have been relocated inboard next to the engines on the C-model, effectively turning them into twin tails. The aft deck also was extended about 2 feet at the rear.
"We are thrilled to get back in the air to start collecting data in this low-noise configuration," said Heather Maliska, NASA Dryden's X-48C project manager.
The modified test vehicle was designed by Boeing and built by Cranfield Aerospace Ltd., in the United Kingdom, in accordance with Boeing requirements.
While Boeing continuously explores and applies innovative technologies at its own expense to enhance its current and next-generation products, the X-48C flight-test research is an example of how the company also is looking much farther into the future at revolutionary concepts that offer even greater breakthroughs in the science of flight.
"Boeing has been a leader in technology and aerospace for almost 100 years. Our employees work to solve big challenges and create complex, highly capable systems, from today's 787 Dreamliner airplane and P-8A Poseidon multi-mission military aircraft to the X-48C, which explores ideas for future advances. Every day our team is building on our legacy of groundbreaking technical achievements that have improved life for people worldwide," said John Tracy, Boeing chief technology officer and senior vice president of Engineering, Operations & Technology.
Engineers from Boeing Research & Technology, the company's central research, technology and innovation organization, will be working closely with NASA engineers during flight tests of the X-48C, which are expected to continue throughout 2012. As handling qualities of the X-48C will be different than those of the X-48B, the project team developed flight control software modifications, including flight control limiters to keep the airplane flying within a safe flight envelope.
With a 21-foot wingspan, the 500-pound aircraft is an 8.5 percent scale model of a heavy-lift, subsonic airplane with a 240-foot wingspan that possibly could be developed in the next 15 to 20 years for military applications such as aerial refueling and cargo missions. The X-48C has an estimated top speed of about 140 miles per hour, with a maximum altitude of 10,000 feet. The X-48C project team consists of Boeing, NASA, Cranfield Aeropace, and the U.S. Air Force Research Laboratory.
Boeing and NASA's Aeronautics Research Mission Directorate are funding X-48 technology demonstration research. The effort supports NASA's Environmentally Responsible Aviation project, which has goals to reduce fuel burn, emissions and noise of future aircraft.
www.Noticias-Aero.info: Boeing Flies X-48C Blended Wing Body Research Aircraft
- 12/03/2013, 07:47 #6
- 13 may, 08
- En las nubes
- 12/03/2013, 08:29 #7
- 20 ago, 08
En la web de Boeing dice que sería para aplicaciones militares: Refuel y/o cargo.Press sucks!
- 12/03/2013, 09:25 #8
- 03 ene, 11
- Torrejon de Ardoz (de estómago)
- 12/03/2013, 16:13 #9
Pero dónde cojones tienen los ingenieros el sentido de la estética ultimamente????
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- 12/03/2013, 16:27 #10
*Que no diseñado. El proyecto de Boeing ni siquiera paso a la fase de prototipos...Tendrian posiblemente un anteproyecto que fue luego la base del 747.
Última edición por Ce_Zeta; 12/03/2013 a las 16:32
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