On the basis of the well-known aircraft An-14 new machine has been developed, which is designated as AN-714. It was a pilot project for the Antonov Design Bureau. A special feature of this product was to use instead of the standard chassis of the new development, namely the chassis hovercraft. This system was developed in the design bureau Kuibyshev under the leadership of IA Berezhnoy. These pillows were planning to install both airplanes and helicopters. We can say that this model has been specially developed to test air bags.
Brief History of the AN-714
First of all, it should be noted that attempts to establish the aircraft on an air cushion there have been many, but few of them have been successful. The first attempt dates back to 1939 year when designers have worked on the basis of a new model of aircraft UT-2. On this machine, rubber cylinders, which are placed in the middle of the fan system were installed.
A second attempt was made in the year 41. The construction of the second prototype involves the installation of cylinders under the aircraft engine nacelles. The plans of the designers planned to data rubber cylinders during the flight down and drawn into the nacelle structure, after which the compartments are closed hatches. But ultimately, the aircraft with the designation Pe-2 never took off. But unlike his predecessors-714 An aircraft could make a flight in October 1970 years. It was set up just one copy, because the further development of the project was unpromising.
Design features of the chassis AN-714
chassis system has been represented by three air cylinders toroidal structure of the scheme. They were equipped with rubberized cloth, which was attached to the place of standard rack mount chassis system. On top of each of the three cylinders was set by the hydraulic motor such as GM-36, which had a capacity of 22 horsepower. Data engines were mounted rotors, they rotate on the main engine through the rotor system. installation data were 28 weight in kilograms.
These settings are made by the machine lifting rotor revolutions that created the bottled high pressure area. It is due to the differential pressure between the atmosphere and the interior of the balloon flight up to the point of stabilization of pressure. In operation, an excessive amount of the air came out cushion between itself and the pad surface on which the machine is standing. Investigation revealed Constructors that these settings to the surface pressure with which the lifting is done, it becomes 0,07 kgf / cm², which is a hundred times smaller than with a conventional wheeled undercarriage.
For the operation of the aircraft of this design had two crew members. By plane AN-714 trapezoidal fenders were installed with the wing area almost 40 square meters. The machine had a relatively low weight when empty - 4,5 tons. The power plant of the aircraft AN-714 is a reciprocating engine design type star AI-14 RF. He provided the unit with a capacity of a thousand horsepower.
With all these characteristics of the aircraft could reach a top speed of 209 km / h, cruising speed - 165 km / h. The maximum flight range with a full tank refueling in 290 450 kilos was kilometers. The altitude at which the aircraft could climb as much as possible, - 4,2 kilometers. A special feature is the rather short distance of the takeoff roll - just 117 meters on concrete or on the ground. In addition, the aircraft could take off to produce snow cover in 30 centimeters thick. At the same time the car was enough just 130 meters.
|Aircraft Length m||11.36|
|Wing area, m2||39.72|
|engine's type||2 PD Progress (Ivchenko) AI-14RF|
|Power, hp||X 2 300|
|Maximum speed km / h||209|
|Cruising speed, km / h||165|
|Practical range, km||450|
|Practical ceiling, m||4500|
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