152 mm Reduced Charge
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 SPECIFICATIONS
Type of propellant | 9/7 | 4/1 | 8/1 |
Length (mm) | 11.5 - 12.6 | 5.5 -7.5 | 395 -410 |
Hole diameter (mm) | 0.4 - 0.6 | 0.25 -0.35 | 2.7 -3.0 |
Web thickness (mm) | 0.95 -1.10 | 0.4 -0.55 | 0.70-0.85 |
Total volatiles (%) | ≤ 4.5 | ≤ 3.8 | ≤ 3.5 |
External moisture (%) | 1.0 -1.8 | 1.0 -1.8 | 1.0 -1.8 |
Residual solvent (%) | ≥ 0.9 | ≥ 0.6 | ≥ 0.9 |
Stability at 134.5 °C | ≥ 40 | ≥ 40 | ≥ 40 |
BALLISTIC SPECIFICATIONS
Charge No. | No.2 | No.3 | No.4 | No.5 | No.6 |
Charge weight (approx.)for propellant type 9/7 (g) | 2650 | 1590 | 1060 | 530 | 0 |
Charge weight for propellant type 8/1–41 (g) | 100 | 100 | 100 | 100 | 100 |
Charge weight for propellant type 4/1 (g) | 1175 | 1175 | 1175 | 1175 | 1175 |
Average muzzle velocity at 15°C(m/s) | 511 ± 5 | 427 | 380 | 335 | 282 |
Average bore pressure at 15°C (kgf/cm2) | ≤ 2300 | - | - | - | - |
Std. dev. of Velocity (m/s) | ≤ 2 | - | - | - | - |
| Attachment | Size |
|---|---|
| chapter 1-5_21.pdf | 874.73 KB |
