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HESH vs Spaced Armour

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Soviet live fire experiments with HESH fired from a 105 mm tank gun and a 106 mm recoilless rifle were published in the Armoured Journal (Bronetankoviy Vestnik) as a part of a study on tank protection. In this study, various types of armour layouts were simulated by placing thin 2P steel or aluminium alloy plates of various types, representing skirt armour, at a distance of 330 mm away from a thicker 2P steel plate, representing the side of the tank's hull. The shots were fired from 100 meters. Here are the results.

Caliber (mm)

Angle

(deg)

Impact velocity

(m/s)

Armour thickness (mm)

Damage

Normaliza-tion angle of fragments

First plate

Second plate

105

0

634

5+20 (Steel)

Breach 650x400 mm

Breach 240x300 mm*

0

105

0

615

5+80 (Steel)

Breach 500x550 mm

Dents from fragments up to 12 mm deep over 350x400 mm

0

105

0

605

5+20 (Steel)

Breach 650x480 mm

Dents from fragments 10-12 mm deep over 500x550 mm

0

105

0

614

10+20(Steel)

Breach 600x600 mm

Plate cracked, two penetrations, dents from fragments over

0

105

0

722

10+20(Steel)

Breach 500x400 mm

Three penetrations, dents from fragments over 350x370 mm.

0

105

0

617

10+30(Steel)

Breach 550x600 mm

Dents up to 7 mm deep over 370x400 mm.

0

105

0

607

30 (ABT-101) + 20 (Steel)

Plate cracked

Dents up to 8 mm deep over 450x400 mm, 706 mm long crack.

0

105

0

615

5 (AMG-6) + 80 (Steel at a 60 deg angle)

Penetration 170x110 mm

Plate cracked**

-

105

45

606

5+20 (Steel)

Breach 780x350 mm

Plate cracked. Dents from fragments up to 10 mm deep over 550x500 mm

15-25

105

50

606

5+20(Steel)

Breach 650x290 mm

Plate cracked. Dents up to 11 mm deep over 550x500 mm

20-25

105

60

640

5+20(Steel)

Breach 550x340 mm

Dents up to 13 mm deep over 500x620 mm.

20-30

105

60

635

10+20(Steel)

Plate cracked

40x40 mm penetration, dents from fragments over 350x500 mm.

-

105

60

599

13(ABT-101) + 20 (Steel)

Breach 500x480 mm

Dents up to 100 [sic] mm deep over 500x490 mm.

20-30

105

0

489

5+45(Steel)

Breach 620x480 mm

Dents up to 5 mm deep over 600x560 mm.

0

106

60

489

10+20(Steel)

Plate cracked

Breach 310x170 mm, dents from fragments over 430x400 mm.

35-40

106

60

489

20+45(Steel)

Breach 800x550 mm with spall fragment

Dents up to 15 mm deep from fragments over 360x380. 20 mm dent from spall fragment.

30-40


*The shell did not explode upon striking the first layer, but deformed slightly.
**The shell penetrated the spaced armour and exploded upon hitting the main armour.


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