Т-64A and object 287, object 775 ERA, 1968 design

[Andrei_bt]

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The story of how in 1968 the universal dynamic protection for the Object 775 and T-64A tanks was developed and tested, surpassing all subsequent developments of the Research Institute of Steel - "Contact" and "Contact-5". This page of the history of tank building is not mentioned anywhere, especially the Research Institute of Steel.

Based on the data obtained as a result of studying the parameters and testing full-scale samples of dynamic anti-cumulative protection (ChTZ, the developer of the tank object 775) designed dynamic protection for the upper frontal part of the layout of the body of the object 775, the design of which was subject to the following basic requirements:
1. Non-penetration by cumulative ammunition penetrating up to 600 mm of steel armor of medium hardness.
2. Non-penetration by armor-piercing sub-caliber and armor-piercing shells of 100, 115 and 122 mm caliber at standard speed.
3. Reducing the weight of the tank by 1.5 ÷ 2% in relation to object 775 having a combined barrier (steel + fiberglass + steel) on the upper frontal hull sheet, fig. 775-50-sb4.
4. Preservation of the internal volume of the body of the 775 object without a significant increase in its external dimensions.
The design was based on the scheme of a single-layer dynamic anti-cumulative protection, shown below and consisting of a steel armor base, flat protective rows of explosives located on the outer surface of the armor base, and attachment of protective charges to the armor base.

http://btvt.info/3attackdefensemobility/history_of_ERA_pt2.htm

http://btvt.info/3attackdefensemobility/history_of_ERA_pt1.htm

http://btvt.info/3attackdefensemobility/history_of_ERA_pt2_1.htm​

 

[Andrei_bt]

1968 tests showed incredible results – the level of protection achieved decade – up to 800 mm against ATGM and 125 мм APFSDS. Also test confirmed perfect durability of the ERA, superior to Kontakt and Kontakt-5 of 1980-s.

http://btvt.info/3attackdefensemobility/history_of_ERA_pt3_1.htm

 

[overscan (PaulMM)]

Very interesting, thanks @Andrei_bt

 

[Andrei_bt]

Continued publications on the history of reactive armor (dynamic protection as mentioned in US records). Tests of APFSDS, HEAT, ATGM with 785 mm armor penetration. Impressive result, protection up to 800-900 mm in 1968. Impressive survavability http://btvt.info/3attackdefensemobility/history_of_ERA_pt3_2.htm

 

[Colonial-Marine]

Why wasn't this pursued by the Soviets?

 

[Andrei_bt]

Why wasn't this pursued by the Soviets?

This is the main question, suppose they were afraid of new decisions not realized in western countries

 

[Pioneer]

Fascinating!!

Many thanks for bring such development research to my attention Andrei-bt.

Regards
Pioneer

 

[chuck4]

Why wasn't this pursued by the Soviets?

This is the main question, suppose they were afraid of new decisions not realized in western countries

that seems unlikely. If they pursue this design and the west later realizes it, this stilll gives them several years of advantage. If they don’t pursue this design while the west discover this principle independently, they gain nothing.