SU-152G

The SU-152G (Russian: СУ-152Г, GABTU index "Object 108") is a Soviet experimental 152-mm self-propelled howitzer, and is designed by OKB-3 of the heavy machine construction division of Uralmash. The main designer of the SU-152G is Lev Gorlitsky.[1] The SU-152G was intended to suppress and destroy enemy firing positions, engage armored hostiles as well as area denial, in addition to conducting counter-battery tasks.

SU-152G
A SU-152G in the Kubinka museum.
Type	Self-propelled howitzer
Place of origin	USSR
Production history
Designer	Lev Gorlitsky
Designed	1948-1950
Produced	1948
No. built	1
Specifications
Mass	23.8 t
Length	6.46 metres (21 ft 2 in)
Width	3.1 metres (10 ft 2 in)
Height	2.62 metres (8 ft 7 in)

History

At the end of the second World War in 1945, the USSR started to seek a new anti-tank and assault gun. The main concept of the said gun is to be able to defeat armored vehicles with directly-launched shells. At that time the western world and the US were developing artillery capable of firing from closed positions. Gradually, these artillery began to replace the towed guns that had once been used. The irreplaceable position of self-propelled guns in local conflicts became obvious. Despite the artillery used by the USSR then were fitted with necessary sighting adaptations for firing from closed positions, the maximum barrel elevation of these artillery were at maximum only 15-20 degrees. This significantly hampered the performance of self-propelled artillery, especially when compared with the towed ones.

From the angle of ranged strike capabilities, the main threats of self-propelled artillery were German Waffenträgers, lightly armored self-propelled anti-tank cannons, some models of which were taken by the Soviet army in the spring of 1945. Using data of these artillery, OKB-3 under L. I. Gorlitsky prepared two projects for the new artillery. Decree No. 2252-935 of the USSR was issued on 22 June 1948. OKB-3 then commenced the designing of the SU-152G in accordance with the decree.

The designing of the SU-152G was mainly handled by OKB-3, while the cannon, the D-50/D-1 was developed by OKB-9. The first experimental model of the artillery was completed in March 1948, and was handed over to the military representatives of the factory on 16 June 1948. Two more D-50/D-1 cannons were made by factory No. 9 till 31 December 1948. The SU-152G, together with the SU-100P anti-tank gun, was directed to undergo factory testing. A total driving distance of 865 km was included in the test, as well as an 88- and a 51-round firing volley. Results of the test showed that the rate of fire and the performance of the SU-152G was satisfactory. However, a number of defects regarding the design of rubber-metal hinges, which were used in Soviet armored vehicles for the first times, and there were problems with the tracks as well.

After the tests the SU-152G underwent state trials. The SU-152G, together with the SU-100P and the SU-152P took part in state trials, which revealed flaws in the chassis of the SU-100P. Improvements of the basic chassis and elimination of identified flaws continued until June 1955, after which the SU-100P and the SU-152G were adopted into service by the Soviet Army, but most of the work on self-propelled guns were called off by Khrushchev in 1955, which rendered the SU-152G unable to enter mass production.

Design description

Hull and turret

The SU-152G uses an open turret mounted on the hull. The hull was welded from rolled homogeneous armor (RHA) and is divided into 3 compartments: the power compartment which houses the transmissions and the engine, the driving compartment and the combat compartment. The engine and the transmissions were housed in the front right part of the vehicle. To its left were the driving mechanisms with chassis controls. In the middle of the vehicle was the combat compartment, and is equipped with armored shielding. The ammo rack is located to the rear, analogous to that of the SU-100P. The gun is located on the turret above the hull. The turret had a traverse range of 71.5 degrees to either the left or the right, and the maximum elevation range was from -5 to +40 degrees. The entire vehicle needed a crew of 5 to operate. The armor was made to withstand gunfire and shrapnel damage. The armor for the hull was 25 mm thick (0.98 in), while the turret had 15 mm-thick (0.59 in) armor.

Armament

Main 152.4-mm shells used by the SU-152G. Note how the letter Г is incorrectly shown as r. 1. OF-530 High Explosive Fragmentation shell 2. O-530A Fragmentation shell 3. G-530 High Explosive Anti-Concrete shell

The main armament of the SU-152G was the D-50/D-1 152-mm howitzer. It was completely unified for ballistic characteristics, internal mechanisms and ammunition with the D-1 152 mm towed howitzer. The barrel was connected to the breech, and a muzzle brake was fitted to the barrel. A vertical, wedged gate was installed in the breech, along with a semi-automatic, free-floating ejector. To ease the loading process, a mechanical loader was placed as well. The gunner's seat has a ZIS-3 panoramic sight for firing from closed positions, and an OP1-7 direct-firing sight for observation of shell impact. The ammo rack of the SU-152G was capable of holding 42 shells.

The main shell employed by the D-50/D-1 was the 53-OF-530 High Explosive Fragmentation shell fitted with an RGM, RGM-2 or a D-1 fuse. When fired with full propellant charge, the shells had a muzzle velocity of 508 meters per second with a maximum range of 12.39 km. The 53-OF-530 has a steel casing and 5.83 kg of TNT as payload. When equipped with a contact fuse, it was capable of a 2100-square-meter area denial against enemy infantry in a standing profile, and was able to create a crater up to 1.2 m deep and up to 3.5 m in diameter. For greater effect against infantry the 53-O-530A fragmentation round was used with an RGM-2 or D-1-U fuse, or the 53-OF-530R High Explosive Fragmentation shell and the 3OF9, armed with AR-26 and AR-30 radio-controlled fuses, respectively.

For anti-tank fire the SU-152G was capable of using 53-BP-540 HEAT shells, with a penetration capability of up to 250 mm of Rolled Homogeneous Armor at a range of up to 3 km. Naval High-Explosive, Semi-Armor-Piercing A3-PB-35 shells were also available, with the capability of penetrating 68 mm of RHA at a range of 2 km. The range of choice also included special-purpose shells, which include illumination rounds, smoke shells, concrete-piercing shells and chemical shells. 4Zh5 and 54-Zh-536M propellant charges were used to fire HEAT and naval shells. The 54-Zh-536 propellant charge was used for the rest, intended for D-1 and M-10 howitzers, while the 54-Zh-534 was dedicated to firing from 152 mm howitzer model M1909/30s, albeit their use was recommended to be avoided since their use could led to chamber expansion and consequentially, difficult shell exits.

Table of ammunition

Ammunition designations[2][3][4][5][6][7][8][9][10][11]
Shell index	Projectile index	Charge index	Charge weight, kg	Projectile weight, kg	Fuse	Muzzle velocity, with maximum charge, m/s	Maximum range, km
Armor-piercing
3VBP1	53-BP-540	4Zh5	27.67	5.6	GKB, GPB-3	560	3
Semi-armor-piercing
53-VF-536M	A3-PB-35	54-Zh-536M	51.07	3.15	KTMF	432	5
Concrete-piercing
53-VG-534	53-G-530	54-Zh-534	40	5.1	KTD	405	10.14
53-VG-536	53-G-530	54-Zh-536	40	5.1	KTD, DBT	457	11.2
53-VG-536	53-G-530Sh	54-Zh-536/4Zh13	40	4.89	KTD, DBT	508	12.33
High explosive
53-VO-534A	53-O-530A	54-Zh-534	40	5.31	RGM, RGM-2, D-1	405	10.14
53-VO-536A	53-O-530A	54-Zh-536/4Zh13	40	5.31	RGM-2, D-1-U	508	12.39
High explosive fragmentation
53-VOF-534	53-OF-530	54-Zh-534	40	5.83	RGM, RGM-2, D-1	405	10.14
53-VOF-536	53-OF-530	54-Zh-536/4Zh13	40	5.83	RGM-2, D-1-U	508	12.39
53-VOF-536R	53-OF-530R	54-Zh-536/4Zh13	40	5.43	AR-26	508	12.39
3VOF13	3OF9	4Zh13	40	5.43	AR-30	508	12.39
3VOF101	3OF66	4Zh13	40.85	7.8	RGM-2M, V-90, AR-5		13.7
Fragmentation
	53-F-531		44.91	5.7
53-VF-534	53-F-533	54-Zh-534	40.3	8.8		386	8.57
53-VF-534K	53-F-533K	54-Zh-534	40.7	7.3	RGM, RGM-2, RG-6	386	8.57
53-VF-534N	53-F-533N	54-Zh-534	40.7	7.3	UGT-2	386	8.57
53-VF-534U	53-F-533U	54-Zh-534	40.8	8.8	RGM, RGM-2, RG-6	386	8.57
53-VF-534F	53-F-533F	54-Zh-534	41.1	3.9	AD, AD-2, ADN	384	8.57
Shrapnel
53-VSh-534	53-Sh-501	54-Zh-534	41.2	0.5	45 sec.	384	8.28
53-VSh-534T	53-Sh-501T	54-Zh-534	41.2	0.5	T-6	384	7.89
Smoke
53-VD-536	53-D-530	54-Zh-536
Illumination
3VS4	3S1	4Zh13	40.2	—	T-7	654
Chemical
	53-KhS-530[note 1]	54-Zh-536/4Zh13	38.8			508	12.39
	53-KhS-530D		42.5	5.4[note 2]
	53-KhN-530[note 3]	54-Zh-536/4Zh13	39.1		KTM-2	508	12.39
	53-OKh-530		40		KTM-2, RG-6	508	12.39
	3Kh3		40	2.873[note 4]	RGM-2
	3Kh3-35		40	2.82[note 5]	RGM-2

Communications

The SU-152G was equipped with a 10-RT radio station for communications, while internal communications between the crew was accomplished by the TPU-47-3 intercom.[12][13]

Engine and transmission

A V-105 (V-54-105) V12 4-piston engine was mounted on the SU-152G, capable of outputs of up to 400 horsepower. It is modified from a V-54 engine while making the following adjustments:

• The spring corrector of the NK-10 pump was removed;
• The outlet nozzles, intake manifold, fan drive and the water pump cover was modified;
• The "Kimaf-STZ" oil filter was installed on a separate bracket;
• A G-74 3 kW generator was installed;
• The motor resource was increased;
• The radiator grille was changed for better cooling efficiency.[14][15]

The SU-152G utilizes planetary transmission, with six shifts for going forward and two for reversing. The maximum speed at shift 6 was found to be at 63 km/h.[13]

Chassis

The chassis of the SU-152G was based on that of the SU-100P self-propelled anti-tank gun, and consisted of 6 pairs of rubberized support and three pairs of supporting rollers. On the rear part of the vehicle the guide wheels were installed, while the driving sprockets were mounted on the front. The tracks consisted of small links with rubber-metal forged hinges. Each track measured 412 by 133 millimeters. The SU-152G used individual torsion for suspension. Gydraulic shock absorbers were installed on the first and the sixth pair of rollers.[16]

Comparison to similar vehicles

Comparison with previous and next generation artillery

	ISU-152M[17]	SU-152G[18]	2S3[19]
Combat weight, t	46.0	23.8	27.5
Crew, # people	5	5	4
Gun employment	Closed top	Open top	Closed top
Gun model	ML-20S	D-50/D-1	2A33
Gun length, caliber(s)	28	23	28
Vertical elevation, degrees	−3...+20	−5...+40	−4...+60
Horizontal elevation, degrees	10	143	360
Ammunition, rounds	20	42	40
Maximum range of HEF rounds, km	13.0	12.39	17.4
HEF round weight, kg	43.56	40.00	43.56
Rate of fire, rounds/min	2—3	3—4	1.9—3.5
Possibility of artillery fire	No	Yes	Yes
Possibility of mortar fire	No	No	Yes
Anti-aircraft machine gun caliber, mm	12.7	—	7.62
Maximum speed on-road, km	40	65	60
Range on-road, km	400	290	500

The main differences between the SU-152G and the ISU-152 as well as its variants, and that between it and 2S3 made it what appeared to be a middle ground between these two self-propelled guns. The ISU-152 was intended to be a heavy assault gun from the beginning, which required capability of direct firing, and a weak transition towards firing from closed positions began. In addition, the crew of the vehicles were often poisoned by the exhaust gases after firing in closed combat compartments. Despite the overt advantage of the SU-152G over the ISU-152 in terms of firing from closed positions, serial production of the SU-152G was never put in effect. All the work on Soviet self-propelled guns were put into a halt in the 1960s and only resumed when the First secretary of the TsK KPSS was removed from position. As a result, the 2S3 "Acacia" was made, favorably different from its predecessor with further increased vertical traverse angles, a closed combat compartment, CBRN protection, a turret capable of circular fire and an increased angle.[20]

Comparison of the SU-152G with foreign counterparts

	Soviet Union—SU-152G	France--F3[21]	US--M44[22]	UK--FV3805[23][24]
Designed	1946—1955	Early 1950s	1946—1951	1950s
Combat weight, t	23.8	17.4	25.3	50
Crew, # people	5	10	5	5
Gun caliber, mm	152.4	155	155	139.7
Gun length, calibers	23	33	23.2	30
Vertical traverse range, degree	−5...+40	0...+67	−5...+65	−5...+45
Horizontal traverse range, degree	143	46—50	60
Ammunition, rounds	42	25	24
Maximum range of HEF shells. km	12.39	14.7	15	14,63[note 6]/16,46[note 7]
HEF shell weight, kg	40.00	43.75	43.88	45.34/36.28
Maximum speed on-road, km/h	65	60	56.3	34
Unit power, hp/t		15.6	14	10.73
Unit pressure, kg/cm^2		0.71	0.84
Range on-road, km	290	300	120	120

The US had developed a new 155-mm self-propelled howitzer on the basis of the T41 light tank from 1946 to 1947, receiving the designation of T99. The T99 was a 155-mm T97 howitzer mounted in a closed armored compartment, which in turn is mounted on a chasses. To fire the howitzer a separated loading procedure is mandatory. It also came with an automated fire control. However, the results of the Korean War had forced the US military to accelerate the process of designing a new self-propelled howitzer. The resulting T99E1 had a capped loading procedure. The gun control system was also simplified and differed from that used on SPGs of the Second World War. During the course of further development of the T99E1, the T194 was created, featuring an open combat compartment with a reduced ammunition load from 30 to 24 rounds. The T194 was subsequently adopted into use as the M44[25]

On the basis of the Centurion Mk.7 the 139.7 mm self-propelled howitzer, designated FV3805, was created. The main armament of this self-propelled gun was the 5.5-inch cannon-howitzer. The maximum range achievable with a 45.35 kg shell was 14.8 km, however, a lighter 36.28 kg shell also used for the cannon had a better range of 16.46 km. The body of the SPG provides armored protection for the crew at the base of the vehicle. To increase stability of the automatic control system during firing, a folding opener was located in the rear of the hull.[26][27] An easier option with an open installation of the gun was available as well, but it did not go further than a prototype obtained by combining the Crusader tank with some parts of the FV300 series.[28]

France in the beginning of the 1950s developed a 155 mm SPG, designated the F3, on the basis of the AMX-13 light tank. The maximum range was 14.7 km with M107 shells. An advantage over the SU-152G, the F3 had a lighter combat weight (17.4 t against 23.8 t), however, it could only carry a total of 25 rounds. Additionally, it required 10 people to operate, two would station in the vehicle while it was mobile, an additional 4 would be transported when it was preparing for firing missions, while the rest would be transported in a special truck that would accompany the SPG.[29]

Local conflicts during the post-war period had proved the necessity of this class of self propelled guns. A series of SPGs were created by the USSR in an attempt to design new self-propelled howitzers, which included the SU-152G. However, most of the work ceased when Nikita Khrushchev issued an order in 1955. The result of this decision was a backstep in the following decades for the USSR, compared to NATO countries, which could only be liquidated by the early 1970s.[30] [31]

Surviving examples

•  Russia:
  • Kubinka: The single experimental prototype is held on display at the Kubinka Museum.

References

1. ""ПОБЕДА" КОНСТРУКТОРА ЕФИМОВА". krasnaya-zvezda.com. Archived from the original on 7 March 2016. Retrieved 9 June 2017.
2. Энциклопедия XXI век. Оружие и технологии России. Часть 18. Химические боеприпасы. Группа 13. Класс 1320. Боеприпасы и артиллерийские выстрелы калибром свыше 125-мм. 152-мм химический артиллерийский снаряд. Том 12. М.: Издательский дом «Оружие и технологии». 2006. p. 848. ISBN 5-93799-023-4.
3. Тимофеев М. "Химическая мина под Россией". Независимое военное обозрение. Archived from the original on 2 July 2013. Retrieved 30 June 2013.
4. Федоров Л. А. (2009). "Глава 8. Закат химической войны. Типы химических боеприпасов, которые имелись у Советской Армии к 1987 г.". Химическое вооружение — война с собственным народом (трагический российский опыт) в трёх томах. 1. Долгий путь к химической войне. М.: Лесная страна. p. 848. ISBN 978-5-91505-013-5.
5. Широкорад 2000. sfn error: no target: CITEREFШирокорад2000 (help)
6. "Боеприпасы". 152-мм гаубица обр. 1943 г. Руководство службы (Четвёртое издание ed.). М.: Военное издательство Министерства обороны СССР. Под ред. Цыбышева В. А. 1971. p. 376.
7. Таблицы стрельбы 152-мм гаубицы обр. 1938 г. и 152-мм гаубицы обр. 1943 г. (Д-1) ТС/ГАУ №155 (Третье издание ed.). М.: Военное издательство Народного комиссариата обороны СССР. Под ред. Кузнецова В. В. 1944. p. 96.
8. Таблицы стрельбы 152-мм гаубицы обр. 1943 г. ТС/ГРАУ №155 (Шестое издание ed.). М.: Военное издательство Министерства обороны СССР. Под ред. Соколовой Г. Ф. 1968. p. 116.
9. Широкорад 1996. sfn error: no target: CITEREFШирокорад1996 (help)
10. Таблицы стрельбы 152-мм гаубицы обр. 1909/30 г. ТС/ГАУ №150. М.: Военное издательство Народного комиссариата обороны СССР. Под ред. Кузнецова А. В. 1942. p. 116.
11. Лещинский Ю. М., Телегин Н. Н. и др. Справочник артиллерийских боеприпасов, подлежащих утилизации и уничтожению. "Nova". Под общей редакцией Каллистова А. А. ISBN 5-87265-001-9.
12. Вараксин Ю. Н., Бах И. В., Выгодский С. Ю. (1981). Бронетанковая техника СССР (1920—1974) (Справочное издание ed.). ЦНИИ Информации. Под ред. Якубчика Г. В., Исакова П. П. pp. 284, 286, 484.CS1 maint: multiple names: authors list (link)
13. Белогруд В. (2006). "Нужна новая САУ. История СУ-100П" (23 /8) (Мир оружия ed.). М.: Руспринт: 67–69. ISSN 1812-3465. Cite journal requires |journal= (help)
14. Павлов М. В.,Павлов И. В. (2009). "Отечественные бронированные машины 1945—1965 гг" (8) (Техника и вооружение: вчера, сегодня, завтра ed.). Москва: Техинформ: 51, 56. Cite journal requires |journal= (help)
15. Белогруд В. (2006). "Нужна новая САУ. История СУ-100П" (23 /8) (Мир оружия ed.). М.: Руспринт: 65–66. ISSN 1812-3465. Cite journal requires |journal= (help)
16. Вараксин Ю. Н., Бах И. В., Выгодский С. Ю. (1981). Бронетанковая техника СССР (1920—1974) (Справочное издание ed.). ЦНИИ Информации. Под ред. Якубчика Г. В., Исакова П. П. pp. 449, 484.CS1 maint: multiple names: authors list (link)
17. Самоходные артиллерийские установки ИСУ-152М и ИСУ-152К. Техническое описание и инструкция по эксплуатации. М.: Военное издательство Министерства обороны СССР. 1973. pp. 8–21, 504.
18. Карпенко А. В. (2002). "Танкомастер" и военно-технический сборник "Бастион". Совместный выпуск. 1(9). СПб. pp. 31, 44.
19. "Книга 1". 2С3М1.ТО. Изделие 2С3М1. Техническое описание для расчёта. Свердловск: ЦКБ «Трансмаш». 1987. pp. 8, 202.
20. Белоусов Ю. (2 March 2011). "Возрождены, чтоб цели делать пылью" (in Russian). Газета «Красная Звезда». Retrieved 25 June 2013.
21. Foss C. R. (2002). "Giat Industries 155 mm self-propelled gun Mk F3". Jane's Armour and Artillery 2001—2002.
22. Template:Книга:R.Hunnicutt. Sheridan
23. Foss C. R. (2002). "5.5 in Medium Gun". Jane's Armour and Artillery 2001—2002.
24. Холявский Г. Л. (2001). "139,7-мм самоходная гаубица". Энциклопедия боевых гусеничных машин, 1919—2000. ООО «Харвест». pp. 136, 761.
25. . pp. 200–201. Missing or empty |title= (help)
26. Foss C. R. (2002). "5.5 in Medium Gun". Jane's Armour and Artillery 2001—2002.
27. Foss C. R. (2002). "5.5 in Medium Gun". Jane's Armour and Artillery 2001—2002.
28. Fletcher D., Sarson P (2000). "Anti tank SP variants". Crusader cruiser tank 1939-1945. China: World print Ltd. Jonson L. pp. 41–42. ISBN 1-85532-512-8.
29. Foss C. R. (2002). "Giat Industries 155 mm self-propelled gun Mk F3". Jane's Armour and Artillery 2001—2002.
30. Белоусов Ю. (2 March 2011). "Возрождены, чтоб цели делать пылью" (in Russian). Газета «Красная Звезда». Retrieved 25 June 2013.
31. Shirokorad 1996, p. 2-3. sfn error: no target: CITEREFShirokorad1996 (help)

1. Persistent poison type.
2. R-43 substance (Viscous lewicite)
3. Unstable poison type.
4. R-55 substance (Soman).
5. R-35 substance (Sarin)
6. For the 45.34 kg shell.
7. For the 36.28 kg shell.