X-48 Blended Wing Body research aircraft makes 100th test flight

November 9, 2012, NASA

The upgraded X-48C version of Boeing's Blending Wing Body subscale research aircraft banks over Rogers Dry Lake near "Contractors' Row" at Edwards Air Force Base during a test flight Oct. 16, 2012. Combined with the earlier X-48B version, the X-48 technology demonstrator has now flown 100 test missions, more than any other single unmanned X-plane. Credit: NASA/Carla Thomas
(Phys.org)—The Boeing X-48 Blended Wing Body subscale research aircraft made its 100th flight in late October at NASA's Dryden Flight Research Center at Edwards Air Force Base, Calif.

The milestone occurred Oct. 30 when the unmanned X-48C aircraft was flown on two separate 25-minute flights—the seventh and eighth flights for the X-48C since it began flying Aug. 7. Between 2007 and 2010, the aircraft, then in the X-48B configuration, made 92 flights.

"Once again, working closely with NASA, we have been pleased to pass another flight-test milestone in our work to explore and validate the aerodynamic characteristics and efficiencies of the Blended Wing Body concept," said Boeing X-48 project manager Mike Kisska of Boeing Research and Technology.

"We are thrilled by the continued success of our flight testing and the useful data that we have collected during the first eight X-48C flights," added Heather Maliska, NASA Dryden's X-48C project manager.

Kisska noted that with 100 test flights flown, the X-48 has far surpassed the previous record of 40 flights performed by a single unmanned X-plane, held by one of the X-45A Joint Unmanned Combat Aircraft technology demonstrators, also developed by Boeing.

Boeing's X-48C Blended Wing Body research aircraft is silhouetted against the morning sky over Edwards Air Force Base during its fifth test flight on Oct. 16. It has flown eight times since Aug. 7. Credit: NASA/Carla Thomas

The X-48 is a scale model of a heavy-lift, subsonic aircraft that forgoes the conventional tube-and-wing airplane design in favor of a modified delta design that effectively blends the vehicle's wing and body into a smoothly contoured configuration. Boeing and NASA believe the blended or hybrid wing body concept offers the long-term potential of significantly greater and reduced noise.

Boeing's blended wing body program manager Bob Liebeck said earlier of the X-48B proved that a blended wing body aircraft can be controlled as effectively as a conventional tube-and-wing during takeoffs and landings and other low-speed segments of the flight regime. With the X-48C, the team has been evaluating the impact of noise-shielding concepts on low-speed flight characteristics.

The X-48C, which was modified from the previous X-48B version, is configured with two small 89-pound-thrust turbojet engines instead of the three 50-pound-thrust engines on the B-model. The wingtip winglets on the X-48B have been relocated inboard next to the engines on the C-model, effectively turning them into twin tails, and the aft deck was extended about two feet at the rear.

The Boeing-NASA team expects to fly the X-48C approximately 20 more times before the -test program concludes.

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2 / 5 (3) Nov 09, 2012
I want one.
not rated yet Nov 09, 2012
It's taken a long time to get this right.
I bet the six million dollar man (bionic man) wished they had this technology when he crashed one. (Remember the TV show anyone??)
2.3 / 5 (3) Nov 10, 2012
Maybe it will sneak up on the Al Zawahiri dude, present leader of AlQuaeda, and quietly carry sixteen Hellfire missiles to send him and his whole camp to hell. Seriously, a quiet UAV capable of heavy armament loads would be like having a tough warthog A-10 type bird of a subscale or UAV variety.
2.3 / 5 (3) Nov 10, 2012
Some would suggest that if or when BWB is implemented for passengers transport, it would not be welcome, because most of the passengers would not have an outside view.

However, we already have a tradition of different classes of passengers on ships (and now airplanes) for centuries. First and business classes would have the seats near the edges for an outside view. The others just have to make do with the interior seats, just like they have always been put in the lower decks in the age of sea-liners.

It is just a matter of economics. For the airliners, the BWB offers them aerodynamics efficiency and thus lower flying costs. For the passengers, price the cost of flying appropriately for different seats and they will continue to get on everything under the sun that will get them to where they want to go.

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