AT 1933 g. under the direction of P. AND. Syachintova work began on designing self-propelled "triplex heavy artillery of Special Purpose" (tAON). Chassis, which was used for this war machine, consisted of a chassis of a heavy tank T-35 and the transmission medium tank T-28. In front of the self-propelled motor and housed powertrains. AT 1934 g. It was manufactured prototype Su-14, howitzer equipped with a sample B-4 1931 g. caliber 203 mm and three machine guns.
Photo SAU SU-14 with 203-mm gaubitsey B-4
On installing the stern had two winches, hoisting capacity 200 kg each, designed for loading ammunition. The stability of self-propelled during firing had to provide special openers, put forward by manual or hydraulic actuator. However, during the test revealed a strong rocking installation, because of which the Gunners were forced to cling to the handrails, to stay on the job site. A complex system of supply winches shells had a negative impact on the rate of installation. Besides, during the tests there was a breakdown of the sliding floor-hatch, under which there is 8 shells, transported directly to the installation.
In order to eliminate the detected defects Su-14 has undergone substantial refinement. Engine cooling system has been improved, reinforced chassis, small capacity guns barrel replaced with larger capacity trunk liner. Shooting can be carried out not only in the direction of movement of the installation at a considerable angle of elevation, but also in the horizontal direction, including when harvested coulters. However, these improvements were not sufficient, as shown by tests, last summer 1935 g. Although the installation successfully passed its course around 500 km, in its design and operation of a number of serious defects. Su-14 and has not been put into mass production.
SAU SU-14-1
On the basis of experience, resulting in the development of designs Su-14, project was created a new self-propelled, a prototype of which was made in the beginning 1936 g. This war machine was upgraded powertrain, improved significantly and coulter design, intended to stabilize the self-propelled. Suspension mechanism is turned off while shooting, whose futility was discovered during tests of the Su-14, in the self-propelled SU-14-1 did not apply. Through the use of a more powerful engine increased the value of the maximum speed, which could develop installation.
During tests of the Su-14-1, It has been implemented in 1936 city, This self-propelled artillery unit successfully passed its course around 800 km. According to the results of artillery fire was concluded that the possibility of replacing the caliber howitzer 203 mm for long-range gun Br 2 or mortar Br-5. Soon, however, work on the creation of a "triplex" curled due to repression of design engineers and the high command of the Red Army. SAU SU-14-1, despite the fact that its characteristics, it significantly exceeded the Su-14, and it has not been put into mass production. The only prototype of the Su-14-1 and sample Su-14 entered the military storage warehouse number 37 in Moscow.
General view ACS CS-14-1 to 152 mm high power tool U-30. 1936 year (RGAZ).
SAU SU-14-Br-2
The first self-propelled guns were first in the world constructed in the USSR, however, due to the complex political situation in the country of further improvement of the combat vehicles and launch them into production were permanently suspended.
only in 1939 g. during the Soviet-Finnish War, the need for such facilities has become apparent. Units of the Red Army, "Mannerheim Line" abandoned the assault, We need a powerful fire cover. It was decided to strengthen the armor of two existing pilot plants, SU-14 and SU-14-1, by shielding bronelistami 30-50 mm thick and send these war machines in a war zone. Screening was needed, to install have the opportunity to approach the enemy pillboxes on the distance-blank.
However, the manufacture of armor plates, zakazannoe Ižorskomu Institute, It was delayed until March 1940 g. By the time the fighting in the area of the Karelian Isthmus completed.
At ACS SU-14 was established gun B-30 caliber 152 mm, and the SAU SU-14-1 - Rifle Br-2. During the test setup with enhanced reservation circa 26 km. It revealed, that their driving performance is poor. Reversals were made difficult, the engine operates with a voltage. The transmission has not been improved in the proper amount due to lack of funding work, Only rubber tires have been replaced with metal rollers. Both self-propelled installation 1941 g. participated in the defense of Moscow in the region Kubinka station.
Tactic-technical characteristics of SU-14-Br-2
| Weight | 64 t |
| Crew | 7 people. |
| full speed | 22 kmh |
| weaponry | 152 mm rifle Br-2, 3 guns×7,62 mm DT |
| Engine | Diesel M-17F |
| Power | 680 HP. |
| booking | 30-50 mm |
| Battle gear | heavy tank T-35 |
SAU SU-14-Br-2 with puškoj Br-2 – photo around Cuban
