In the middle of 90-ies the company Mc Donnell Douglas, which now is a part of the corporation "Boeing" aircraft engaged in the development scheme BWB. These machines were not pronounced combination of fuselage and wing. This circuit structure is also known as the "flying wing". In 1997 the company with support from NASA was able to create the first car BWB, which had a wingspan of at 5,2 meters. The unit was installed conventional propeller engine. All flight tests of the device held in the same year, they were successful.
In 2000 the company "Boeing", namely the division of Phantom Works, began developing the project BWB, while the aircraft was equipped with three turbojet engine type. Almost all development department ahead of their time, not the exception, and this was the aircraft, which was originally dubbed as BWB-LSV. Yet it was a design model had only 14% of the size of the real proportions of the finished machine. It was created to study the shortcomings of flight, takeoff and landing. In 2001 the project received the official designation X-48. Of course, the X index indicates an increase in interest from the Pentagon.
Created UAV X-48 was almost all made of composite materials, with a wingspan reaching 10,7 meters. The power plant was submitted by three small engines model J24-8 type turbojet powered by Williams. Yet in 2002, the government is developing the project was closed down because of problems in management. Despite this, the company continued fine-tuning of the machine, and then in year X 2003-48 passed all ground tests. Flight tests began in 2004 year. This helped the British company Cranfield Aerospace.
Two prototypes of the type X-78V company "Boeing" produced in 2005 year, and the first flights are scheduled for 2006 year. Parallel to this, NASA has fulfilled performance car in the wind tunnel. Flight tests began only 20.07.2007 years, used to do this made the second car. The entire flight was completely under the control of an operator on the ground, while the control panel to transmit images in real time from a camera mounted in the nose of the aircraft. The first phase consisted of 11 flights, while the unit was able to accelerate up to speed 113 km / h. Further improvements have led to speed 140 km / h.
The second stage consisted of 6 flights, which were worked out aerobatic capabilities of the UAV. Custom machines were absolutely identical and have a wingspan in 6,4 meters at weight design in 500 kilos. Normal cruising speed was 200 km / h and a maximum altitude - 3 kilometers. It should be noted that a scheme such as BWB aircraft should be spent on 20% less fuel.
A large number of internal space allows the device a very powerful instrument for the calculation and command and control. Due to the installation of various equipment is a multi-functional machine. It should be noted that the world-famous Times, 2007 edition was recognized UAV X-48 invention of the year.
|Wing area, m2|
|The maximum speed, km||200|
|Practical range, km|
|Practical ceiling, m||3000|
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