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Mil Mi-6

Mil · Heavy Lift Helicopter · USSR · Early Jet (1946–1969)

The Mil Mi-6 (NATO reporting name Hook) was a Soviet twin-turbine heavy-lift helicopter — at its 1957 first flight the world's largest helicopter + the first helicopter to exceed 300 km/h. Mikhail Mil designed the Mi-6 in 1954-1957; first flight 5 June 1957. About 926 Mi-6s were built between 1959 and 1981 at Rostov-on-Don Plant No. 168. The aircraft served Soviet Air Forces + ~10 export operators 1959-late 1990s.

The Mi-6 used 2 × Soloviev D-25V turboshaft engines (5,500 shp each — among the most-powerful helicopter engines ever built). Maximum speed 300 km/h, range 1,000 km, service ceiling 4,500 m. Capacity: 90 passengers / paratroops + 6 crew, or 12,000 kg internal cargo / 9,000 kg external sling. The aircraft used a unique winged-helicopter configuration — small stub wings provided ~20% of lift at cruise speed, reducing rotor loading + improving high-speed performance.

Mi-6 service was foundational to Soviet heavy-airlift role. Soviet Air Forces operated ~500 Mi-6s 1959-1995 in heavy-lift + paratroop assault + Spetsnaz insertion roles. Combat use included Soviet-Afghan War 1979-1989 + Chechen conflicts. Export operators included Vietnam + Indonesia + Egypt + Iraq + Algeria + others. The Mi-6 set 16 world helicopter records 1959-1965 — including lift, speed, and altitude records. About 12 Mi-6 airframes survive in 2026 at Russian + Eastern European museums.

For Kids — a shorter, friendlier version

The Mil Mi-6 was a giant Soviet helicopter from 1957. When it first flew, it was the biggest helicopter in the whole world. It was also the first helicopter ever to fly faster than 300 km/h, or about 186 mph.

The Mi-6 had two huge turbine engines on top with 5,500 horsepower each. That made them some of the most powerful helicopter engines ever built. The Mi-6 could carry 90 soldiers or up to 12 tons of cargo inside. That is heavier than ten cars combined.

The helicopter was unusual because it had small wings on the sides. Most helicopters do not have wings, but the Mi-6 used its wings to share the lift with the rotor at high speed. This helped it fly faster than other helicopters of its time.

About 926 Mi-6s were built in Rostov-on-Don between 1959 and 1981. The Soviet military used them for moving troops, missiles, and big cargo. Aeroflot also flew them in remote parts of Siberia. The last Mi-6s were retired around the late 1990s.

Fun Facts

When the Mi-6 first flew in 1957, it was the biggest helicopter in the world.
It was the first helicopter ever to fly faster than 300 km/h.
The Mi-6 had small wings on the sides to help with high-speed flight.
It could carry 90 soldiers or 12 tons of cargo inside.
About 926 Mi-6s were built between 1959 and 1981.
Aeroflot used the Mi-6 in remote parts of Siberia.

Kids’ Questions

Why does the Mi-6 have small wings?

Most helicopters only have a rotor to give them lift. At very high speeds, the rotor has a hard time keeping a big helicopter in the air. The Mi-6's small wings give about 20% of the lift at cruise speed, so the rotor can spin a little slower and the helicopter can fly faster.

What was the Mi-6 used for?

The Soviet military used the Mi-6 to move troops, missiles, and big equipment over long distances. Aeroflot also used it as a cargo helicopter in cold, remote parts of Siberia where there were no roads. The Mi-6 helped build oil fields and small towns.

Variants

Mi-6A (basic): Standard production. ~800 built.
Mi-6PRTBV (mobile rocket reload): Specialised variant for Strategic Rocket Forces logistics.

Notable Operators

Soviet Air Forces (1959-1995): Principal user. ~500 airframes; Afghan + Chechen combat use.
10+ export operators: Vietnam + Indonesia + Egypt + Iraq + others.

Frequently Asked Questions

Why does the Mi-6 have wings?

Unloading the main rotor at cruise speed. At cruise (~250 km/h) the small stub wings provide ~20% of total lift — reducing rotor disc loading + allowing higher cruise speed than a pure-helicopter configuration. The configuration also improves autorotation safety at high speed. The Mi-6 was the first widely-deployed helicopter to use the winged-helicopter concept; the larger Mi-26 + Mi-12 followed the same approach.

Sources

Wikipedia — Mil Mi-6