Russian 100mm UBM 6 APDS-T cartridge for 100mm D-10 Gun of the T-55
Cutaway model of a Russian 100 x 695mm UBM 6 (УБМ 6), GRAU: 3UBM6 (3УБМ6) cartridge as used in the 100mm D-10 gun of the T-55 tank. The BM-8 (БМ 8 ), GRAU: 3BM8 (3БМ8 ) is an APDS-T (Armour Piercing Discarding Sabot – Tracer) anti tank projectile.
In contrast to the “normal” APDS-T cartridges which usually have break away sabots, the sabot of the BM-8 is a one piece sabot that remains complete. The subcaliber projectile is fixated in the sabot by means of four small radial placed pins -at 90 degrees each-, placed half in the subcaliber projectile, half in the sabot. The pins are locked up by little screwed in caps on the outside of the sabot. Upon leaving the barrel, the cup shaped part in the front of the sabot catches the airstream with such force that the four pins shear off and the subcaliber projectile leaves the sabot that loses speed very quick.
The penetrator is a 120 mm lang tungsten carbide bullet with a weight of 2,82 kg. The penetrator is placed in a soft steel body that forms the subcaliber projectile. The soft steel part in front of the tungsten carbide penetrator forms the piercing cap. It prevents the projectile from bouncing off when the target is hit at a low angle. It is held in place by the skin of the subcaliber body that is rolled in over the ogive of the piercing cap. A round aluminium nosepiece is screwed on the flattened top of the piercing cap.The subcaliber projectile weighs 4,13 kg, the complete projectile (with sabot) weighs 5,69 kg. A large tracer capule is screwed in the base of the subcaliber projectile. In flight, the subcaliber projectile has a 55 mm diameter.
At the end of the seventies of the last century the UBM 6 cartridge did not meet up to expectations anymore, and was replaced by the 100mm BM-20 APFSDS-T cartridge.
Vo : 1425 mtr /sec
Penetration : claimed (as far as I can find out) to be 264 mm @ 1000 mtrs.
This is the last posting for this year
Happy ending and a prosporous, healthy and safe 2012
Last edited by PzGr40; 28.01.2013 at 14:27.
You wanna make a piece of ammo look interesting? .......cut it!
Looking for / Suche noch:
-8,8cm D (drahtsperre)
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-8,8cm Ex; Steel base and nose, rest inbetween resign.
-Ex ZtZ.S30 (with bearing instead of clock inside).