76-mm Regimental Cannon technical Details
- Production years-1942
- Total issued-2 units.
- Caliber-76 mm
- Weight in combat position-1350 kg
- Barrel length-1940 mm
- Length of the rifled part – no data available
- Calculation – 7 people
- Driving speed-25 km / h
- Rate of fire-10-12 rounds/min
- Maximum firing range-13,290 m
- Direct shot range – 440 m
- Horizontal – 4.5°
- Vertical – 6° +25°
76-mm Regimental Cannon Details
After the beginning of the Great Patriotic War, it became obvious that the 76-mm regimental gun of the 1927 model, along with its positive qualities, had a low efficiency of shooting at moving targets. The reason for this was the lack of flexibility of fire, caused by relatively low speeds of vertical and horizontal aiming, as well as the fact that the single-tier carriage limited the angle of horizontal firing to only 4.5°. In addition, the mass of the gun in the firing position was 920 kg , which was too much for the rapid offensive operations of the second period of the war. Also, the combat experience of using this gun revealed that its armor penetration is clearly insufficient.
In most cases, the sides of German medium and light tanks were protected by armor with a thickness of about 30 mm, which was the limit of the capabilities of this gun even at close combat distances. In March 1942, the GAU approved the tactical and technical task for a new regimental gun, the main requirements of which were to increase armor penetration to 50 mm at a distance of 500 m ; reduce weight (850 – 900 kg in the combat position), as well as in its maximum unification with artillery systems already in production. To get a regimental gun that meets the new requirements, it was necessary to increase the guidance speed, the angle of horizontal fire and reduce the mass. The Kirovsky Zavod Design Bureau in besieged Leningrad, where mass production of standard 76-mm regimental guns of the 1927 model was mastered, carried out work on its modernization in a short time.
The improved gun received a barrel lengthened by 9 calibers, a breech to balance the swinging part of the gun, an inert load was mounted, and minor alterations were made in the design of recoil devices. All other components and parts remained unchanged. The upgraded model of the gun, which received the designation “76-mm regimental gun of the 1927/42 model”, was made in January 1942. This artillery system passed field tests in the spring and summer of 1942 together with the 76-mm ZIS-21-11 regimental gun, created in the Design Bureau of plant No. 92. The Leningrad 76-mm gun of the 1927/1942 model at a distance of 500 m was able to penetrate 45-mm armor at a distance of 500 m at a meeting angle of 60°. However, the weight of the gun was 1350 kg, which exceeded the requirements by almost 500 kg . However, already in August, both guns were removed from further testing, since by this time 76-mm cumulative shells with armor penetration from 70 to 90 mm at all distances, regardless of the initial speed, had appeared in the ammunition of the 76-mm regimental gun, and the need to increase the initial speed of the regimental guns had disappeared.