The Mi-26 helicopter, the heaviest and most powerful helicopter in the world, was designed for carrying large-size cargoes weighing up to 20 tons. It is the result of an early 1970s specification for a transport helicopter whose empty weight, without fuel, was not to exceed half of its maximum take-off weight. It can be used for construction projects ranging from bridges to power transmission lines. The combination of high load-carrying capacity and high cruise speed makes the use of the helicopter economically efficient. The helicopter is loaded through the cargo hatch in the tail of the fuselage with lowered ladder and subladders. The cargo cabin is equipped with two electric hoists and lifting and loading devices ensuring loading and carrying along the cabin of cargoes weighing up to 5 tons. The Mi-26 is the first helicopter with an eight-blade main rotor, which is mounted above the fuselage midsection on a hump. Two turboshaft engines are mounted on top of the cabin with round air intakes above and behind the cockpit and exhaust ports at the sides of the engines. The long, bus-like body with fixed tricycle landing gear tapers to the nose and rear, with an upswept rear section and rounded nose and stepped-up cockpit. The tail is swept-back with a slightly tapered fin with large rotor on right side. The flats are forward-tapered and low-mounted on leading edge of the fin. The load and lift capabilities of the aircraft are comparable to the US C-130 Hercules transport aircraft.
There are two versions of the Ka-32 helicopter: transport Ka-32T and shipborne Ka-32C.
The Ka-32T version is designed for transporting cargoes inside the cabin and and externally (for oversized cargoes), passenger transportation, logging in hard access areas, to fulfill civil engineering and installation work, construction, search/rescue missions, medevac and off-shore oil rings servicing operations and various types of aerial survey.
The Ka-32C version is designed for carrying out ice prospecting during the steering of the convoys of ships, their unloading, performance of rescue operations at sea and acting as ambulances. The Ka-32 has two TVZ-117 turboprop engines which provide higher power and safety under extreme conditions. Transport version, KA-32T, is devoted to carry cargoes both internally