Hybrid airship

A hybrid airship is an aircraft that combines characteristics of heavier-than-air (HTA) technology, fixed-wing aircraft or helicopter, and lighter-than-air (LTA), aerostat technology.[1] Examples include helicopter/airship hybrids intended for heavy lift applications and dynamic lift airships intended for long-range cruising. No production vehicle
Found on http://en.wikipedia.org/wiki/Hybrid_airship
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