PR-V4 PDM12 - 25/03/2012

Same parameters as PDM10-11. You want to see combustion repeatability.
Same thrust and pressure level of PDM10. Curve behaviour smothed in respect to PDM10.

Acquisition frequency [Hz]: 240
Load cell offset [N]: 0.6
Propellant: P-1
Propellant mass [g]: 173.0
Mean density [g/cm^3]: 1.825
Ideal density ratio: 96.7 %
Grain number: 3
Spacing (between grains) [mm]: 5
Total grain length (without spacing) [mm]: 184.6
Port grain diameter [mm]: 16.05
External grain diameter [mm]: 30.17
Throat diameter [mm]: 8.5
Inhibition: External, final terminated (grain interfaces not-inhibited).
Action time (ta) [s]: 0.2542
Burn time (tb)[s]: 0.3542
Maximum thrust [N]: 922.8
Mean thrust (tb)[N]: 617.5
Mean pressure (tb)[bar]: 66.3
Total impulse [Ns]: 227
Specific impulse [s]: 130.2

Propellant: P-1
Grain mass [g]: 4.52
Grani length [mm]: 27.2
Port Diameter [mm]: 3
External Diameter [mm]: 11,6

Environmental data:
Atmospheric pressure [mbar]: na
Air temperature [°C]: na