Boeing Phantom Works, with NASA and the Air Force Research Laboratory has tested what is calls “Blended Wing Body”. The 21-foot wingspan, Three 50 lb each thrust three JetCat P200 turbojet engines , speed up to 120 knots in its low configuration and climbed at an altitude of 10,000 feet. This X-48B is destined for transport, bombing and intelligence.
The Boeing BWB design resembles a flying wing, but differs in that the wing blends smoothly into a wide, flat, tailless fuselage. This fuselage blending helps to get additional lift with less drag compared to a circular fuselage. This translates to reduced fuel use at cruise conditions. And because the engines mount high on the back of the aircraft, there is less noise inside and on the ground when it is in flight.
The BWB aircraft concept under study by Boeing and NASA since the early 1990s to evaluate its potential structural, aerodynamic and operating efficiencies over current aircraft designs. First flight expected in June/July 2007 and Contingent upon further testing and program funding, a military cargo version could be operational in the 2015-2020 timeframe.
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