Kaman K-MAX

The Kaman K‑MAX is a distinctive coaxial‑rotor helicopter developed by Kaman Corporation in the United States. Its design work began in the early 1990s, and the prototype first flew in 1991, entering limited production in 1994. The aircraft was conceived as a single‑seat, external‑load carrier, optimized for repetitive lift‑and‑drop missions such as logging, firefighting, and external cargo transport. Its most notable feature is the twin, counter‑rotating main rotors that eliminate the need for a tail rotor, providing high lift efficiency and compact dimensions. A lightweight aluminum airframe, high‑power Turbomeca Arriel 2D turboshaft engine, and a simple control system enable the K‑MAX to lift payloads up to 6,000 pounds—roughly twice its own weight—while hovering in tight spaces. The helicopter’s minimal footprint and ability to operate from ship decks or confined clearings have made it valuable for military resupply, particularly in Afghanistan, where it performed autonomous cargo missions after a 2011 upgrade to an unmanned‑autonomy package. The K‑MAX’s proven reliability and unique coaxial design have influenced modern rotorcraft development and underscore Kaman’s long‑standing contribution to specialized aviation solutions. Today, the K‑MAX continues to serve civilian operators worldwide, demonstrating the versatility of its robust design.