The Su-4. A photo. History. Characteristics.
Soviet Su-4 - sequel to the legendary Su-2, compiled of the more powerful engine. Another significant difference is the installation of more efficient weapons: conventional guns were replaced by large-caliber.
On the plane at the beginning of its design it was planned to deliver two-row 18-cylinder engine M-90 designer EV Urmina. He had a much smaller size than any existing aircraft engines star of the time.
Pavel Sukhoi before the war began to be installed on new light attack aircraft engine models. According to his calculations the autumn 1941 years could begin the installation on the Su-2-89 motors M EV development Urmina. However, he soon changed his mind, and Suu-2 steel equipped with the power plant, which was based engines M-82 AD Shvetsov. Dry identified two promising motor M and AM-90-37. The first of them was tested on the Su-4 1941 early years.
The design of the Su-4 differed from the base model wooden fuselage and wing of the same, which were installed metal spars. The plans of the designer was placing on the wings and the top turret attack aircraft heavy machine guns Taubina.
By that reason, the motor M-90 has not yet passed the experimental test, the first samples Su-4 equipped M serial-82. Lack of duralumin forced to make wooden wings with metal spars and plywood sheathing. Armament much modificationahead of the base model. In the center section of Su-4 housed two large-caliber machine guns on each wing was ShKAS gun. In addition, the aircraft can carry up to 400 kg bomb charge. The aircraft was able to climb 6000 10,5 meters per minute. The speed of the machine at ground level reached 450 km / h.
In April 1942 the aircraft was on the state tests, which tested his flying and fighting qualities. When you have finished checking the model began to produce commercially, and perform combat missions during World War II.
There are data that show the installation on the prototypes Su-4-90 engines M and AM-37. However, these machines were not completed due to the permanent evacuation during the war. The only copy of the Su-4 with motor M-90 was gathered in Omsk and flew 4 30 hours minutes test time. Research Project-bomber attack aircraft with new engines shut down due to the termination of serial production of Su-2.
|Wing area, m2||29.00|
|engine's type||PD Shvetsov M 1-82|
|Power, hp||X 1 1250|
|Maximum speed km / h||512|
|Cruising speed, km / h||469|
|Practical range, km||605-1000|
|The maximum rate of climb, m / min||630|
|Practical ceiling, m||9500|
|Armament:||Two 12.7-mm machine gun BS and two to four 7.62-mm machine gun ShKAS (650 rounds on the barrel)|
|8-10-82 Nursi PC or PC-132 and / or 400-600 kg bombs|
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