The Soviet helicopter that carried 65 troops and a heavy artillery battery

Technology · Published 20 October 2026 · Updated 22 October 2026 Swipe more like this →

In short: In the 1950s, the Soviet Union needed a vertical-lift aircraft capable of conquering vast wilderness and moving massive military hardware. The result was the Mil Mi-6, a behemoth that redefined heavy transport. It wasn't just a helicopter; it was a flying crane that set world records for speed and lift.

First flown on June 5, 1957, the Mil Mi-6 (NATO reporting name 'Hook') was the USSR's first production helicopter powered by a turboshaft engine. Designed between 1954 and 1956, it was the world's largest helicopter at its inception, boasting a maximum load capacity of 12,000 kg. Its engineering was a feat of scale: the R-7 gearbox and rotor head alone weighed 3,200 kg, which was actually heavier than the two turboshaft engines providing the power. To overcome the aerodynamic limitations of such a massive craft, engineers equipped the Mi-6 with variable-incidence winglets. First mounted in 1960, these wings provided approximately 20% of the lift required during cruise flight, allowing the aircraft to reach a top speed of 300 km/h (190 mph). Despite its size, it was a record-breaker, achieving a circuit speed of 340 km/h (211 mph) in its early years.

Even decades later, it held the FAI record for the fastest 5-tonne lift over 1,000 km, a feat it accomplished in 1962 at 284 km/h. The versatility of the Mi-6 was unparalleled. It could transport 65 armed troops, 41 stretcher patients, or bulky cargo like vehicles and heavy artillery through rear clamshell doors. It was adapted into numerous specialized variants: fuel tankers, search and rescue craft for the Vostok and Soyuz space modules, and even a prototype firefighting helicopter with a 12,000 L water tank. The era of the Mi-6 finally ended in October 2002, following a crash in the Taimyr Peninsula and reports that its wooden tail rotor blades had reached the end of their service life.

The Mi-6 served as a critical tool for both military mobility and the exploration of the USSR's eastern regions, proving that massive scale could be balanced with specialized aerodynamic features like variable-incidence winglets.

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