Mammoth-sized blimps may work well as advertising tools, but soon they could be doing a lot more work than that. Aerospace and defense corporation Boeing and Canadian company SkyHook International are working together to create a 302-foot-long airship with rotors that can haul heavy loads—double the capacity of the biggest helicopter—across remote regions at a lower fuel and environmental cost.
in germany, failed project called "Cargolifter", see http://www.ftd.de/unternehmen/industrie/:Hintergrund%20Warum%20Cargolifter/383802.html
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