Kaman K-MAX

The Kaman K-MAX (company designation K-1200) is a helicopter with intermeshing rotors (synchropter) designed and produced by the American manufacturer Kaman Aircraft. It first flew in 1991 and was produced for military and civilian operators. Developed in the 1980s and 1990s, the K-MAX builds on the work of the German aeronautical engineer Anton Flettner. It was designed for external cargo load operations; later configurations supported aerial firefighting and casualty evacuation. It can lift more than 6,000 pounds (2,700 kg), which is greater than the helicopter's empty weight and almost twice as much as the competing Bell 205 despite sharing a similar engine. Kaman sought to develop the K-MAX into an unmanned aerial vehicle with optional remote control.