EDePro Kralja Milutina 33, Belgrade Serbia

155mm Hybrid Rocket Assist – Base Bleed Projectile

155mm HE RA-BB MO3 High Fragmenting Steel Body + TNT Body Steel Solid Rocket Motor

BOAT-TAIL BB UNIT HYBRID RA/BB

23 km 30 km 39 cal. 52 cal. Base Bleed Unit 40+ km 56+ km

HE RA-BB 155mm projectile is a rocket assisted-base bleed projectile that will extend the operational range of most 39, 45 and 52 caliber 155mm gun howitzers by +10 km, depending on the gun and charge used. The biggest contribution is on the 39 caliber gun-howitzers which will have the same performances as 52 caliber system with ERFB-BB projectiles. HE RA-BB 155mm projectile intent is not to replace existing HE projectiles. It compliments existing ammunition systems for greater ranges, requiring no special training or logistic. HE RA-BB 155mm enables 39 caliber 155mm gun howitzers to engage enemy battle units at greater ranges, whilst well beyond the range of their counter battery fire. It also enables long range harassment fire onto enemy logistic lines, forcing them to deploy an additional +10 kilometers from the front edge of the battle area. Its terminal effectiveness (blast and fragmentation) is same as that of the standard round. Penetration/piercing capabilities will give excellent performances in anti-structural use. Tehnical Characteristics – 155mm HE RA-BB MO3 -

Dimension Value Weapons: M109A Series (USA) M198 (USA) Caliber 154.74 mm M114/39 (USA/) Total mass unfuzed 47.590 kg FH77B (Sweden) FH70 (UK, , ) Length unfuzed 802 mm M139 (Netherlands) M46/84 (Serbia YU) Explosive charge - TNT mass 4.6kg NORA B52 (Serbia) Rotating band diameter 157.86 mm etc…

Solid Rocket Propellant Grain mass 3.4 kg Propelling Charges Type/Zone: M203, M203C Base Bleed Propellant Grain mass ~1.3 kg MACS 5, MACS 6 M11, M11C Ballistic Data Value etc…

Projectile with Fuze – Length 899 mm Fuzes: UITU, MO2 Total mass 48.150 kg PD 739 A1 PD M572, M739 Muzzle Velocity 835 m/s (39) Prox. M732 940 m/s (52) etc…

Maximum Chamber Pressure 430 MPa

Maximum Range 41160 m (39) Solid Propellant Rocket Motor: 56200 (52)

Accuracy: Rocket Motor Characteristics: Range dispersion =0.75% Total impulse of : >5600 Ns Propellant mass: ~3 kg Latheral dispersion =0.14% .3 Ignition Delay: 17 s ±2s (Dispersion due to ignition delay ≤ 0.02%) Temperature range -400 to 630C + Forces acting upon Propellant Grain: “g” level: 16000 g max Rotation speed: 18000 rev/min

= EDePro Thermoplastic Composite Propellant Type Flexolite F75 (low sensitivity of burning rate to spin, high mechanical properties)

155 mm HE RA-BB MO3, 39 caliber howitzer