DARPA trying again to develop a high-speed VTOL aircraft

DARPA trying again to develop a highspeed VTOL aircraft

If at first your unmanned aerial vehicles don't succeed... try, try again? After a series of unsuccessful tests with the Boeing X-50 Dragonfly and Groen Heliplane, the US government is once again trying to develop a high-speed, vertical takeoff-and-landing (VTOL) aircraft. DARPA just announced the VTOL X-Plane program, a 52-month, $130 million project with one mission: to build an aircraft that can exceed 300 knots, achieve a hover efficiency of 75 percent or better, and hit a cruise lift-to-drag ratio of 10 or more.

In layman's terms, such an aircraft would be faster than a traditional helicopter, but still have better hover efficiency than a modern high-speed 'copter. Sounds like a sensible idea, right? The thing is, DARPA doesn't know yet how such a thing would look: for now, the agency is merely soliciting proposals, with a particular emphasis on smaller, non-traditional companies nimble enough to develop products quickly. So if you've got any good ideas, may as well head on over to the source link, we guess, and try your luck.

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Via: Defensetech

Source: Federal Business Opportunities

SpaceX’s ‘Grasshopper’ vertical takeoff / vertical landing rocket takes its first small leap (video)

SpaceX's 'Grasshopper' vertical takoff  vertical landing rocket takes its first small hop video

This test-firing may not match the flame of earlier demonstrations, but SpaceX CEO Elon Musk tweeted out a brief eight-second video of another setup it's testing, the "Grasshopper" reusable vertical takeoff, vertical landing rocket. While the first hop would've been shamed in any interstellar dunk contest, future tests will range in height from a few hundred feet to two miles. The goal is to eventually create a reusable first stage for its Falcon 9 rocket, able to land safely instead of crashing into the sea and being damaged beyond repair. Hit the more coverage links for a few more details on the project as well as pictures of it at the Texas test site, or check after the break to see the video.

Continue reading SpaceX's 'Grasshopper' vertical takeoff / vertical landing rocket takes its first small leap (video)

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SpaceX's 'Grasshopper' vertical takeoff / vertical landing rocket takes its first small leap (video) originally appeared on Engadget on Sat, 22 Sep 2012 00:16:00 EDT. Please see our terms for use of feeds.

Permalink   |  sourceElon Musk (Twitter), yfrog  | Email this | Comments

US Army breaking up with A160 Hummingbird drone-copter, says it’s too high maintenance

US Army breaking up with A160 Hummingbird drone-copter, says it's too high maintenance

It's not me, it's you. The US Army's dalliance with Boeing's A160 Hummingbird drone got one step closer to Splitsville after the military branch issued a stop-work order for the project. Initially scheduled to see action in Afghanistan starting this July, the chopper-drone turned plenty of heads thanks to a DARPA-developed Argus-IS imaging system with a 1.8-gigapixel camera capable of spying on ground targets from 20,000 feet. The honeymoon period between the Army and the A160 is apparently over, however, thanks to a host of issues. These included wiring problems as well as excessive vibration that caused an A160 to crash earlier this year due to a transmission mount failure. The problems not only increased risk and caused delays, but also led program costs to helicopter out of control -- a big no-no given Uncle Sam's recent belt-tightening. In the meantime, the Army is reportedly checking out the K-MAX, though it's important to note that this unmanned chopper specializes in cargo and doesn't have the A160's eyes.

US Army breaking up with A160 Hummingbird drone-copter, says it's too high maintenance originally appeared on Engadget on Tue, 26 Jun 2012 07:56:00 EDT. Please see our terms for use of feeds.

Permalink Wired  |  sourceInsideDefense.com (Subscription required)  | Email this | Comments