| Northrop Grumman Switchblade | |
|---|---|
| Image of Switchblade in oblique position by John MacNeill | |
| Role | oblique flying wing UAV |
| National origin | United States of America |
| Manufacturer | Northrop Grumman |
| Program cost | US$10.3 million |
The Switchblade is a proposed unmanned aerial vehicle being developed by Northrop Grumman for the United States. The United States Defence Advanced Research Projects Agency (DARPA) has awarded Northrop Grumman a US$10.3 million contract for risk reduction and preliminary planning for an X-plane oblique flying wing demonstrator.[1]
The program aims at producing a technology demonstrator aircraft to explore the various challenges which the radical design entails. The proposed aircraft would be a purely flying wing (an aircraft with no other auxiliary surfaces such as tails, canards or a fuselage) where the wing is swept with one side of the aircraft forward, and one backwards in an asymmetric fashion.[2] This aircraft configuration is believed to give it a combination of high speed, long range and long endurance.[3] The program entails two phases. Phase I will explore the theory and result in a conceptual design, while Phase II will result in the design, manufacture and flight test of an aircraft. The outcome of the program will result in a dataset that can then be used when considering future military aircraft designs.
Flight of the Switchblade is scheduled for 2020 and will cruise with its 61-meter long oblique wing perpendicular to its engines like a typical aircraft. As the aircraft increases speed, the wing begins to pivot, so that when it breaks the sound barrier, its wing has swiveled 60 degrees, with one wingtip pointing forward and the other backward. The change in aerodynamics and the general structure makes the plane very difficult to control for a human being. The plane is totally controlled by an onboard computer, which handles appropriately all the parameters needed for maintaining a stable flight during the mission.
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Both Messerschmitt and Blohm + Voss aircraft companies worked on the asymmetric wing concept at the end of World War II. The B&V P.202 and ME P.1109 were their initial attempts at implementing this concept.
From 1979 to 1982, NASA successfully flew the piloted AD-1 demonstrator aircraft which validated the oblique wing concept.
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General characteristics
Performance
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