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March 19, 2016 10:00 pm

Stealthy Drone Can Hide Underwater For Months, Then Float To Surface To Take-Off

An anonymous reader writes from an article on DigitalTrends: After months of analysis and experimentation, a team of researchers from Johns Hopkins University's Applied Physics Lab announced the successful development of a reliable sea-to-air UAV. Dubbed the Corrosion Resistant Aerial Covert Unmanned Nautical System -- or CRACUNS for short -- Johns Hopkins' drone has the ability to reside for months underwater without deteriorating or decaying. Once given the signal, the CRACUNS would then rise to the water's surface and begin flight, capable of undertaking a variety of missions. In order for the drone to accomplish this, the team had to develop a body that contained no structural metal parts or machined surfaces. The composite-body had to not only be extremely lightweight, but able to be submerged in water and hold up to constant water pressure. CRACUNS project manager Jason Stipes said in a published press release, "Engineers at APL have long worked on both Navy submarine systems and autonomous UAVs. In response to evolving sponsor challenges, we were inspired to develop a vehicle that could operate both underwater and in the air."

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