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125mm Heat
Transcript of 125mm Heat
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125MM HEAT-FS ROUNDS
Common properties:
Projectile mass 19,000g
Projectile length 680mm
Charge mass 1,624..1,850g
Muzzle velocity 905m/s
Max.dispersion 0.21mil
EFC rating 1
Chamber pressure 300MPa
Extended fins span 343mm
Rear tracer; point-initiating, base-detonating (PIBD) fuse
HEAT-FS rounds:
3VP-5 (3P-11 projectile)(DOI unknown)Practice HEAT round (samemass and behaviour as HEAT-FS, but inert)
3VBK-7 (3BK-12 projectile)(DOI 1962)420mm RHA at 0; Steel liner;A-IX-1 charge (flegmatizedRDX); I-238 detonator3BK-12M modernization utilizesimproved 3V-15 detonator (DOI1968)
3VBK-10 (3BK-14 projectile) (DOI 1968)450mm RHA at 0; Steel liner; octol charge (flegmatized 75%HMX/25% TNT); 3V-15 detonator
3VBK-16 (3BK-18 projectile) (DOI est.1975)500mm RHA at 0; Copper liner; octol charge; 3V-15 detonator3BK-18M modernization introduces wave-shaper boostingpenetration by 10% (DOI est.1978)550mm RHA at 0; Copper liner; octol charge; 3V-15 detonator
3VBK-17 (3BK-21 projectile) (DOI est.1980)Complex of measures to improve jet formation reliability550mm RHA at 0; Copper liner; octol charge; 3V-15 detonator3BK-21B model (DOI est.1982)
3P-11 practice HEAT round
3BK-18M round
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520mm RHA at 0; DU liner for improved performance on advancedarmors and enhanced behind-armor effects.
3VBK-21 (3BK-25 projectile) (est.DOI 1985)Unknown performance and round configuration
3VBK-25 (3BK-29 projectile) (est.DOI 1988)New explosive pressingtechnology improves jetprecisionWeight reduced to 18,400g;MV boosted to 915m/sEst.650mm RHA at 0; Unknown liner; tandem charge3BK-29M presented by NIMI in 1998;unknown improvements over 3BK-29
3VBK-25I (3BK-29I projectile) (est.DOI1988)Practice HEAT round that matches 3BK-29'sflatter trajectory
3VBK-27? (3BK-31? projectile) (indevelopment?)800mm RHA at 0680mm RHA at 0 behind external ERA
660mm RHA at 0 behind integral ERAUnknown liner; triple charge
An experimental HEAT round (according to somesources, designated 3BK-31), was first displayed onVTTV-97 exhibition in Omsk. Its cutaway shows avery complex and ingenious design, including shaped-charge precursor, thechannel through the middle charge to allow passage of the rear jet and so on. Theround is credited with 800mm RHA penetration which was illustrated by a pictureof a 800mm penetration route. The picture shows that designers probablydeliberately misaligned the charges so that the middle jet doesn't need to
penetrate the core of the rear one. If the color of the liner is the same as that onthe real round, it indicates that it is not copper, and therefore may have improved
performance against ceramic armors. 3BK-31? is designed to defeat vehicles with external ERA, integral ERA and/or
composite armor main structure; the precursor charge trips ERA, the first maincharge conditions advanced armor array and initiates penetration, and the lastachieves destructive penetration. The sequence of charges detonation is precursor-> rear charge -> middle charge.
3BK-29M round
3BK-31? round
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800mm pen. route by a demonstrated round