Tupolev airplanes and-12 (ANT-23). A photo. History. Characteristics.
And-12, or formerly known as ANT-23, designed specifically for gun dynamo-reactive type of production LV Kurchevsky. Designing started the first of April 1929 years and six months TsAGI was presented preliminary design. The project developed a special technical requirements, contributing to a heavy fighter to fight at an altitude of up to 5000 m against enemy aircraft. To this end, he established two AIC caliber 76,2 mm. Shells stuffed with buckshot. In November of the same year, several draft copies were shown on the NTC meeting.
After the meeting finally approved the shape of an airplane. In addition to appearance, considered and adopted the option, which provides for the construction of double-girder single-metal fighter. He used the air-cooled engine "Jupiter" with a capacity of 420 hp The plumage of the two-keel. Kurchevsky guns were installed inside the beams of steel pipes (diameter 170 mm). The two-spar wing aircraft for the first time in the history TsAGI applied to plating of the outer zigzag(Rifts) step 150 mm. For the development and construction of an aircraft engineer in charge ASSC VN Chernyshev.
Assembling fighter ended in the summer of 1931 years, and he was sent to the airfield. On finishing the propeller system is gone for another month. In late August, the first time the plane took off, showing satisfactory performance. But the improvement of the car did not stop. During the flight of experienced designers found that the vertical tail double type is outside the zone of blowing propellers, resulting in inefficient rulezhu and run.
This is why during the flight tests on the airplane attached single-fin tail, after strengthening its rigidity braces. Area ailerons increased. Failed demonstrated themselves engine cowling. This led to the accident aircraft during one of the tests: slivers blown rear fairing screw.
On-12 and installed a new front engine hood. Often subjected to rework mount the horizontal stabilizer. The specificity was the fact that it was connected to a power system with a bony chassis.
By late summer, the aircraft was prepared for combat testing. In November, held after the aircraft took place finishing Ground shooting at the airport Air Force Research Institute. The first shooting was successfully conducted, but the transport plane in Moscow there was a small accident, because of which snapped chassis. Repair accompanied by some modifications. Three months later, in February 31 year test pilot IF Kozlov ferried And-12 in Monino for further fire tests.
In March, a plane flown on Kuntsevsky landfill. They tested the APC in the air. Every gun equipped with two shells: one in the trunk, the second in the store. During the trials of combat accident. The plane with small losses in the construction still managed to save, and test pilot was awarded the Order of the Red Star. After the accident, a meeting was held at Tukhachevsky. It decided to modify the gun, strengthen the rigidity of the ribs and increase their thickness. After repairing the plane rose into the air even 21 times, but because of the number of defects was decided to terminate its development. As a result, the plane was dismantled and its parts were sent to different factories.
In the future, we planned to resume the project called I-12bis. The scheme used the same but changed the number of arrangements, in particular the geometric parameters: wingspan - 15,6 m Aircraft length - 7,5 m, wing area - 33 square. m. Increased aerodynamics.
Construction began in the year 1931, but further development was stopped due to the poor results of the first machine. The build process was very difficult, constantly brings new changes and additions. Leaders almost did not pay enough attention to the project. In 1933, the building took up the organization of the Young Communist League. And the plane almost managed to complete, but in January 1 34, the Deputy Chief of TsAGI ordered to stop construction, and 12bis.
The characteristics of the aircraft and-12:
|Wing area, m2||30.00|
|engine's type||2 PD Gnome-Rhone 9AK Jupiter-6|
|Power, hp||X 2 420 (525)|
|Maximum speed km / h|
|near the ground||300|
|Cruising speed, km / h||282|
|Practical ceiling, m|
|Armament:||two 76-mm cannon APK-4|
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