The Kaman K-MAX (Company designation K-1200) is an American helicopter with intermeshing rotors (synchropter) built by Kaman Aircraft. It is optimized for external load operations, and is able to lift a payload of over 6,000 pounds, which is more than the helicopter's empty weight. A remote controlled unmanned aerial vehicle version is being developed and in extended practical service in the war in Afghanistan.
Read more about Kaman K-MAX: Development, Unmanned Remote Control Version, Operators, Specifications (K-MAX)