76 mm HEAT-FS-T BK-354M

M1966 ). The 76 mm HEAT-FS-T BK-354 projectile is employed with the Romanian Mountain Guns Models 48B1A5 and 82 and the Mountain Howitzer Model 84 (see separate entry for details). Description The BK-354M may be loaded as a fixed or separate loading munition as the projectile is only a loose fit in the cartridge case. The steel projectile has relatively thin walls and a short curved ogive, at the top of which is an impact sensor threaded into the fuze cavity. The interior contains 750 g of A-IX-1 (RDX 95 per cent, Wax 5 per cent) contained behind a conical copper liner to form a shaped charge. The nose impact sensor is internally connected to a GPV-2 base detonating fuze so that impact on a target will ignite the explosive filling and create a high-temperature jet to penetrate the target armour. The base of the projectile carries a tubular boom carrying four forward-folding fins. As the projectile leaves the muzzle the fins snap forward to provide a fin span of 275.7 mm for flight stabilisation. The tailboom also contains a No 6 tracer element. The extruded brass cartridge case contains 860 g of 9/7 propellant to provide a muzzle velocity of 325 m/s. A 25 mm brass percussion primer housing is threaded into the base. At any range the BK-354M warhead can penetrate 300 mm set at an angle of incidence of 0º, but the maximum practical range is of the order of 700 to 800 m. This is reduced to 475 m when fired from the Romanian mountain guns although the muzzle velocity is then 410 m/s. When fired from the Romanian Arsenalul Mountain Howitzer Model 84 at a maximum muzzle velocity of 398 m/s, the maximum firing range is given as 1,000 m . Authorised fuzes PIBD GPV-2 Equivalent rounds ROMANIA Marketed by SN ROMARM SA Type: HEAT-T BK-354M Description: Produced primarily for the Model 48B1A5 and 82 mountain guns and Mountain Howitzer Model 84, this one-piece munition differs in appearance by having a flat-fronted projectile with a standoff spike. Complete round length is 725 mm. The fold-out finned projectile weighs 6.065 kg and is approximately 495 mm long, containing 300 g of A-IX-1 explosive. It can penetrate up to 60 mm of armour. Muzzle velocity is 410 m/s and operational range 475 m. UPDATED ROMANIA SN ROMARM SA