Like Ushakov’s pioneering design, it’s a flying wing on pontoons, full of hollow spaces and a pressure compartment. Thirty-four to 36 feet long with a wingspan of between 90 and 110 feet, the ...
SAN FRANCISCO, Dec. 5 (UPI) -- With the launch of the holiday season, American engineer, explorer, entrepreneur Graham Hawkes hopes his latest invention -- a winged submersible that soars beneath the ...
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