digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Detailed view of a BMP-1 turret showing the 73 mm gun tube of the 2A28

The 2A28 Grom is the main armament of the BMP-1 and BMD-1 infantry fighting vehicles. It is a 73 mm low pressure smoothbore semi-automatic gun with a wedge breechblock.


The gun is relatively compact and weighs 115 kilograms (254 lb). In the BMP, the gun is brought to bear by an electric motor, with a manual mechanical backup. The maximum horizontal and vertical traverse speed with the electrical system is 20 °/s and 6 °/s respectively. Minimum horizontal and vertical direction rate is correspondingly 0.1 °/s and 0.07 °/s. The gun can be depressed and elevated between −4° and +33°, with aimed fire possible up to an elevation of +15°. The turret can traverse 360°.[1] Cyclic rate of fire is between 8 and 10 rounds per minute, with the gun returning to an elevation of +3° 30' to reload after each shot if the autoloader is used.

It is fed from a forty round mechanized conveyor double-row magazine located around the turret ring of the BMP. The gun is reloaded by the M3 electromechanical autoloader with ammunition conveyor, but can be reloaded by hand if necessary. The autoloader is not reliable; it can break down from vibration when the vehicle is moving at high speed over rough ground, and its operation is a danger to the gunner's fingers. Using the autoloader, the gun has a rate of fire of 6–8 rounds per minute, while a skilled gunner could easily achieve 10 rounds per minute. These drawbacks caused the autoloader to be removed in Ob'yekt 765Sp3, Finnish BMP-1 and Swedish Pbv 501. Some units removed the autoloader altogether when new vehicles were delivered, but the mechanized ammunition conveyor magazine was kept.


Drawing of PG-9 HEAT projectile

The 2A28 'Grom' smoothbore gun fires the same projectiles as the SPG-9 infantry light recoilless gun, but with a smaller propellant charge. Before 1974, the ammunition only consisted of high explosive anti-tank (HEAT) rounds; the PG-15V HEAT fixed fin-stabilized rocket-assisted round. After 1974, OG-15V HE-Fragmentation projectiles were introduced. In the Ob'yekt 765Sp3, the standard ammunition load is 24 PG-15V HEAT rounds and 16 OG-15V HE-Frag rounds.

The PG-15V HEAT round weighs 3.47 kilograms (7 lb 10 oz) and uses a 2.6 kg (5 lb 12 oz) PG-9 shell with a 0.322 kg (11.4 oz) RDX explosive charge in the warhead.[1][2] A small PG-15P powder charge is used to boost the projectile from the gun barrel at 400 metres per second (1,300 ft/s). Once the projectile has travelled 10–20 m (33–66 ft), the rocket motor starts and accelerates it to 700 m/s (2,300 ft/s). If this low speed projectile's fins catch a crosswind, it tends to weathercock with a consequent reduction in accuracy.

The OG-15V HE-Frag round weighs 4.57 kilograms (10 lb 1 oz), it uses an OG-9 shell with a 0.73 kg (1 lb 10 oz) TNT bursting charge.[3] The muzzle velocity of the OG-9 is 290 m/s (950 ft/s). The OG-15V is loaded by hand as it is too short to be handled by the autoloader.


The HEAT warhead can penetrate 280–350 millimetres (11–14 in) of steel armor—more than enough to penetrate the frontal armor of NATO main battle tanks (MBT)s of the 1970s, such as the US M60A1, the British Chieftain or the German Leopard 1.[4] The modernised PG-9 shell is able to penetrate up to 400 millimetres (16 in) of steel armor. At closer ranges, BMPs were potentially a serious threat to NATO armor.

On the ranges, the PG-9 proved capable of hitting a 2-metre (6.6 ft) high target at a range of 765 metres (837 yd), while its maximum direct fire range is 1,300 metres (1,400 yd), reduced to 400 metres (440 yd) at night, due to the limitations of the night vision system. Under battlefield conditions, it has a maximum effective range of 500 metres (550 yd).[5]

Maximum effective indirect range of the OG-15V HE-Frag round against formation targets is 4,400 metres (4,800 yd). Its effective direct fire range against small point targets is around 1,000 metres (1,100 yd).[1]

Close-up of a Czech BPzV-1's turret, 2 July 2005. Note the ATGM launcher for the 9M14M Malyutka-M

A coaxial 7.62 mm PKT machine gun is mounted to the right of the main armament for which the BMP-1 carries 2,000 rounds in belts of 250. They are stowed in two boxes under the main gun.[2] The machine gun has a rate of fire of around 800 rounds a minute.

The 2A28 "Grom" gun and PKT coaxial machine gun cannot be accurately fired while the vehicle is moving over rough ground. This means that the BMP-1's main armament is less capable than modern stabilised autocannons, which can be fired accurately while moving. The BMP-1 is unable to engage tanks and APCs using the 2A28 "Grom" gun from hull-down positions due to its limited depression, making it vulnerable to enemy fire.[6] The limited elevation of the main gun, its lack of firepower and inaccuracy against point targets at 500–700 metres (550–770 yd) meant that it could not fight effectively in the mountains of Afghanistan.

The BMP-1 was a threat to NATO APCs, light AFVs and even MBTs, from the PG-15V shell at short range, and the 9M14M Malyutka-M anti-tank guided missile (ATGM) at longer ranges.

See also[edit]


  1. ^ a b c MON
  2. ^ a b (1979) Боевая машина пехоты БМП-1. Техническое описание и инструкция по эксплуатации (Infantry Fighting Vehicle BMP-1. Technical Description and Service Instruction). The Ministry of Defence of the USSR.
  3. ^ Global security. BMP-1 specifications
  4. ^ Zaloga 1995, p. 22
  5. ^ Hull/Markov/Zaloga, p. 248
  6. ^ Global Security. BMP-1 Fighting Vehicle


  • Hull, Andrew W.; Markov, David R.; Zaloga, Steven J. (1999). Soviet/Russian Armor and Artillery Design Practices: 1945 to Present. Darlington, Md.: Darlington Productions. ISBN 1-892848-01-5. 
  • Zaloga, Steven J. (1995). BMP Infantry Fighting Vehicle 1967–94. Illustrated by Peter Sarson. Botley, Oxford: Osprey Publishing. ISBN 978-1-85532-433-6. 

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/2A28_Grom — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

6 news items

vietbao.vn (lời tuyên bố phát cho các báo)

vietbao.vn (lời tuyên bố phát cho các báo)
Sun, 10 Apr 2016 07:42:01 -0700

Tốc độ bắn ước đạt 8-10 phát/phút - rất cao. Kinh ngac hoa luc xe chien dau bo binh BMP-1 Viet Nam. BMP-1 trang bị pháo nòng trơn áp lực thấp 73mm 2A28 Grom với cơ số 40 viên đạn. Pháo thủ được trang bị kính tiềm vọng khuếch đại hình ảnh 1PN22M1 ...

Lao động

Lao động
Fri, 19 Jun 2015 17:04:03 -0700

BMD-1 là xe chiến đấu đổ bộ đường không thường dành cho các lực lượng lính dù. Loại xe này nặng 8,3 tấn (khi chiến đầu, dài 5,41m, rộng 2,53m, cao 1,97m, bọc giáp dày 15-42mm tùy từng bộ phận (tháp pháo, thân xe, hông xe...). Xe được trang bại tháp ...

Báo điện tử Kiến Thức

Báo điện tử Kiến Thức
Sat, 30 May 2015 16:00:51 -0700

Xe chiến đấu bộ binh BMP-1 được trang bị tháp pháo có người điều khiển, lắp pháo nòng trơn 73mm 2A28 Grom đạt tốc độ bắn 8-10 phát/phút nhờ bộ nạp đạn tự động (tầm bắn chống tăng hiệu quả 500m). Bên cạnh đó, trên tháp pháo còn lắp bệ phóng tên ...

Báo Đất Việt

Báo Đất Việt
Thu, 17 Apr 2014 21:20:55 -0700

(Ảnh Nóng) - Ngày 16/4, Bộ Quốc phòng Ukraine đã thừa nhận người biểu tình ly khai đã chiếm sáu xe thiết giáp do Kiev phái đến thị trấn Kramatorsk ở miền Đông Ukraine. Theo Bộ Quốc phòng Ukraine, đây là số xe bọc thép BMD-1/2 thuộc lực lượng đổ bộ ...

Báo Đất Việt

Báo Đất Việt
Sun, 20 Apr 2014 23:40:52 -0700

(Ảnh Nóng) - 7 "huyền thoại", đồng thời cũng là xương sống của lực lượng bộ binh cơ giới Liên Xô đã được Mỹ cảnh báo nếu đụng độ thì NATO sẽ thiệt hại lớn. Xe tăng T-72 được sản xuất năm 1971, Xe nặng 44,5 tấn, dài 9,53m, rộng 3,46m, cao 2,23m ...

XãLuận.com tin tức việt nam 24h cập nhật

XãLuận.com tin tức việt nam 24h cập nhật
Wed, 18 Jun 2014 01:10:48 -0700

BMP-1 được trang bị một tháp pháo 2A28 Grom 73mm nòng trơn bán tự động, cùng 4 tên lửa chống tăng dẫn đường bằng dây dẫn 9M14 Malyutka (AT-3) đạt tầm bắn hiệu quả từ 500m đến 3000m. Với trang bị trên, BMP-1 có thể dễ dàng hạ gục các xe tăng ...

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight