The helicopter was designed by twin-screw coaxial scheme and was equipped with 2-piston engines and Four-wheel chassis. The Ka-26 was made on a "flying chassis": immediately behind the cockpit could be set (depending on the task) the different types of suspension: cargo / passenger cabin, spray guns and tanks for aviation chemical works, gin and other equipment. A team of 3 people could just 1.5-2 hours is converted Ka-26 from the 1st option to another.
The history of the creation of the Ka-26
First, the 1960s before the bureau, headed by chief designer of NI Kamov, was tasked to develop a high-performance helicopter for agriculture that could use very different sets of farm equipment depending on the season performed agricultural work. In order to use the helicopter more perfect, it was decided to make it universal. The helicopter can be fairly rapidly converted for cargo, passengers, or to use as a crane for assembly. The helicopter was made under the scheme, which received the title of "flying chassis". Work on the creation of a new light in piloting the helicopter, which holds the highest efficiency drove the chief designer of M. Kupfer.
The thought of development of "flying chassis" for the first time was in practice implemented in the Kamov design bureau in May 1965, when the modular design of multi-purpose helicopter Ka-26 first flew in the air. Drove the car factory test pilot Vladimir Gromov. But let's try to figure out what exactly led the designers to do such, frankly, an unusual helicopter. The fact is that since 1956 the Soviet Union had established an extensive introduction of the Mi-1 and Ka-15 for the needs of the aviation and chemical works. Helicopters were used for fertilizing the soil of gardens, fields, vineyards, they are also used to control weeds and pests. Experience in the use of this technique was so efficient and successful that in a short time for such work was called and more than lifting Mi-2 helicopter.
With all of this front air farm work each year just expanded. It has completely failed to provide any helicopters Mi-2 nor the An-2. It was natural that for these tasks requires more lifting and special helicopter that is suitable for performing a wide range of aviation services. Specifically, the same was done by helicopter and the Ka-26.
Development of a new multi-purpose helicopter was given the decision of the Government in 1964, with the general customer of the project performed Civilian Air Fleet (CAF). Surprisingly, but it was the only helicopter in the USSR, which was used only for peaceful purposes. On this machine is not usually dovleli no strict requirements on the part of the Air Force, so the Kamov design bureau failed to exercise maximum creativity in its development.
It is clear that one of the problems in the development of multi-purpose helicopter was to provide the highest load ratio in each of the different variants of its implementation. This feature in relation to the highest fuel efficiency vast resource units, assemblies and systems for machinery, ease of use, relatively low cost end, ultimately, determine the price of one hour of flight machines. That's why experts at Kamov design bureau decided to make the glider helicopter, using the type of "flying chassis", which would be a permanent part of all the major implementation options helicopter, and equip it with a set of special quick-suspended equipment.
Looking ahead, we can say that a functional helicopter Ka-26 made by coaxial with 2-piston engines and four-post rack was quite far from the aerodynamic perfection. Because of imperfections in aerodynamics maximum speed was limited to that truth was not a determining factor for the helicopter, a hard worker, who could do a large amount of various works at low speeds near the ground. With all this at low altitudes and at low speeds, the best way implemented pros chosen for coaxial helicopter. It provided a good helicopter maneuverability, compactness, and higher thrust than that very ordinariness steering technique aerodynamically balanced helicopter.
If we take into account the aspect of "cost-effectiveness", the Ka-26 helicopter is outstanding, which essentially eclipsed in this regard Mi-2, in particular in the field of transportation of bulky cargo on the outside of the suspension and air-chemical works. The Ka-26 with the lowest weight and lowest power engines could transport by air load similar to E 2 in the mass transport cabin and using the outer suspension — 200 kg. more. With all of this functional helicopter Ka-26 has a 2-fold with a huge range of internal refueling tanks compared with the Mi-2.
Particularly attractive to operators Ka-26 appeared, thanks to its fiberglass rotor blades, which have the resources exceeding 5,000 flight hours, which is almost 10 times the life of the blades of the Mi-2. Design and construction of the production data of the blades of the ball is patented in the top 5 zabugornyh countries in the field of helicopter. This event is also patent purity coaxial rotorcraft have allowed the functional helicopter Ka-26 helicopters, the only one of all the USSR, to receive a certificate for a South American airworthiness standards.
Between 1967 and 1970, was created several versions of the Ka-26. With all this machine produced in the following ways:
— Agricultural Helicopter (without cargo cabin, with bunkers or tanks for spraying and spraying chemicals band width of 20-60 meters at a flight speed of 30 to 130 km / h;
— transport (with a cargo-passenger cabin that is designed to carry six passengers or cargo weighing up to 900 kg. either with a cargo platform instead of the cabin);
— ambulance — was used to transport patients at 2 stretchers and 2 seats with medical equipment and accompanied by a paramedic;
— forest patrol — used to patrol the forest and rescue works in fires. The helicopter was equipped with special electronic winch HAP-150, features a lifting capacity of 150 kg. with a cable length of 40 meters and a hook;
— flying crane — was used for assembly work and transportation of cargo on the outside of the suspension (weighing up to 900 lbs.) was used when the loads due to th
e size of their own are not located on the loading platform;
— ship's life — was equipped with electric winch LPG-150-M3, with a system of boarding the victims, as rescue boat LAS 5M3, curb the radio "Coral" and the television camera. In addition, the helicopter had to ballonets emergency landing on water;
— patrol — was used Inspectorate, helicopter equipped with electric winch, speakers, load hook, could be equipped with a television camera for filming from the air.
Helicopter Ka-26, for more than 30 years with dignity is a working shift. With all of this on this civilian helicopter was found five global records, including an altitude record for a rotary-wing aircraft take-off weight of 1,750 to 3,000 kg. — 5330 meters. Also holds the record for the helicopter climb, the helicopter climbed to an altitude of 3,000 meters in 8 minutes 51.2 seconds.
Tatkiko and technical properties of the Ka-26
Dimensions: diameter of the screw head -13.00 m, length — 7,75 m, height — 4.05 m
Weight, the largest take-off — 3,250 kg.
Motor Type — 2 PD M-14B-26, power 2h239 kW.
Cruising speed — 135 km / h
The highest speed — 170 km / h
Flight range — 520 km.
Service ceiling — 3,000 m
Crew — 2 people.
The desired load is 900 kg. 6 passengers or cargo.
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