The Su-1. A photo. History. Characteristics.
Draft plan for fighter engines with liquid cooling has been identified Sukhoi PO staff At the end and the beginning of 1939 40 years it became necessary military aircraft capable of speeds in excess to overcome 620 km / h. The end result is long in coming, so CCP has sent an unfulfilled task for production plant.
Under the scheme of the project the plane was supposed to respond to such parameters:
- engine M-105P with TC-2;
- the maximum speed at a height of m 6000 570 should reach the mark km / h, and on 10 000 m - 625 km / h;
- landing speed - 120 km / h;
- range - 600 km, and with the presence of a suspended tank - 1000 km;
- the time taken to climb, should not exceed 10-minute barrier;
- armament - Motor Gun caliber mm 20, 2 7,62 synchronous machine gun ShKAS mm, the presence of suspension for bombs weighing 100 kg.
The first prototype planned to create as a fighter capable of flying at high altitude. He did not belong to the high-altitude vehicles, because it was not provided pressurized cabin. Reaching heights planned by turbochargers TC-2. An interesting fact is that the aircraft had a mixed structure: metal wings and a wooden fuselage.
The design of the Su-1
It consisted of wing spar, and it is made of chrome-molybdenum tube. Duralumin ribs were cross set. The very same duralumin paneling. Also in the wing center section and included detachable console. The reason why it was decided to create a wing of metal, considered the weight relief, which in turn is good for flight performance. It is due to increased area and decreased the length of the aerodynamic drag at high altitudes and horizontal mobility increased.
The basic material for the fuselage was the tree. Form - semi-monocoque. Four spar variable section, stringers, frames and planking were the entire framework. The plumage is composed of the keel, stabilizer and frame. In turn, the keel is performed as an integral continuation of the fuselage, the stabilizer formed as a monocoque, while the ailerons and rudders duralumin frame. All sheathed blade. Rudder had a cable control, and elevator and ailerons - hard.
Single-chassis retracted back into the fuselage, the same process applies to the tail wheel. All controlled by means of a hydraulic system. Motor cooled by water under pressure. water supply Radiator marked out for the pilot's seat. His air intake installed under the fuselage and left it at the top of the rear fuselage. We have built a motor oil cooler in the front portion thereof. Maslobachok placed, on the contrary, the top under the hood. Turbochargers have set in the sides of the fuselage behind the motor. Their performance has been associated with the exhaust gases of the motor.
Adjusting the temperature of the oil and water speed of the turbocharger and the engine automatically. The Su-1 installed three-bladed propeller VISH-61. The fuel was placed in two tanks: the main tank 250 kg (placed under the seat of the pilot) and hanging capacity 150 kg (placed under the left wing). As protection was provided for the rear pilot book and radiator water supply.
Practically air ceiling for the aircraft was 10 750 m Taking the time to climb m 6000, 6,1 was minute and 10 000m -. 12 minutes.
Armament consisted 1 motor ShVAK cannon and machine gun 2 ShKAS. The aircraft was able to carry 100 kg bombs.
These indicators were approved by the Committee, and the airplane included in the overall plan for the period samoletostroitelstva 1939 years.
BY. Sukhoi has decided to facilitate the debugging of the power plant and project-135 (renamed in December 1940, in Su-1), therefore, ordered the construction of a special honing stand. The first OP constructed 25 May 1940 years and immediately sent him to TsAGI for factory testing. In June, the pilot AP Chernavskii plane lifted into the air. Improvements and repairs carried out engineers from OKB.
In the period from June to August on the plane tried 4 different oil cooler, fully worked VMG. Third in August during the flight tests on pilot error the plane sat on the runway with the landing gear retracted. Repairs dragged on right up to the ninth of September. Secondary trial began on September 13, and ended in October 40 years.
subsequent operations were carried out for the duration of the test:
- clarified runways properties;
- balancing curves removed to climb, planning and level flight;
- outlined the point of maximum altitude;
- determined rate of climb;
- tested on buffeting and flutter;
- marked airspeed involved with TC;
- It worked out weapons.
All tests confirmed a number of facts about the Su-1. Firstly, it is an excellent transverse and longitudinal resilience, and secondly, a satisfactory directional stability, and thirdly, marked simplicity takeoff and landing.
In the subsequent time it was decided to carry out further tests on the factory based on the new built-in LC-2. Since February 41 years, they carried out the designers of TsAGI. By the beginning of March have already been clarified optimal level of climb with the presence of TK and without it.
|Wing area, m2||20.00|
|engine's type||1 PD Klimov M-105P|
|Power, hp||X 1 1100|
|Maximum speed km / h|
|near the ground||500|
|Cruising speed, km / h||526|
|Practical range, km||720|
|The maximum rate of climb, m / min||1020|
|Practical ceiling, m||12500|
|Armament:||One 23-mm gun and two ShVAK 7.62-mm machine gun ShKAS|
|to 100 kg bombs|
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