152 mm Reduced Charge

Description

Single base seven perforated propellant cylindrical grain, category 9/7 is a kind of single base propellant containing Nitrocellulose (NC) and Diphenylamine (DPA).This propellant plus increments of one perforated granular propellant type 4/1, and tubular type 8/1-41 is used as a reduced charge for 152mm howitzer type D -20. TECHNICAL SPECIFICATIONSType of propellant9/74/18/1Length (mm)11.5 – 12.65.5 -7.5395 -410Hole diameter (mm)0.4 – 0.60.25 -0.352.7 -3.0Web thickness (mm)0.95 -1.100.4 -0.550.70-0.85Total volatiles (%)≤ 4.5≤ 3.8≤ 3.5External moisture (%)1.0 -1.81.0 -1.81.0 -1.8Residual solvent (%)≥ 0.9≥ 0.6≥ 0.9Stability at 134.5 °C≥ 40≥ 40≥ 40  BALLISTIC SPECIFICATIONSCharge No.No.2No.3No.4No.5No.6Charge weight (approx.)for propellant type 9/7 (g)2650159010605300Charge weight for propellant type 8/1–41 (g)100100100100100Charge weight for propellant type 4/1 (g)11751175117511751175Average muzzle velocity at 15°C(m/s)511 ± 5427380335282Average bore pressure at 15°C (kgf/cm2)≤ 2300—-Std. dev. of Velocity (m/s)≤ 2—-