PR-V4 PDM11 - 11/12/2011

Inhibition only on terminal faces. Intergrain spacing standardized at 5mm.
We expect to observe a nearly consstant thrust curve. (Test identical to PDM10).
Thrust behaviour not as predicted (Shark fin like). Subsequent test will be performed to investigate the reasons.

Acquisition frequency [Hz]: 240
Load cell offset [N]: 4.5
Propellant: P-1
Propellant mass [g]: 169.4
Mean density [g/cm^3]: 1.769
Ideal density ratio: 93.7 %
Grain number: 3
Spacing (between grains) [mm]: 5
Total grain length (without spacing) [mm]: 184.7
Port grain diameter [mm]: 15.85
External grain diameter [mm]: 30.2
Throat diameter [mm]: 8.5
Inhibition: External, final terminated (grain interfaces not-inhibited).
Action time (ta) [s]: 0.86
Burn time (tb)[s]: 0.56
Maximum thrust [N]: 739
Mean thrust (tb)[N]: 357.5
Mean pressure (tb)[bar]: 38.5
Total impulse [Ns]: 209
Specific impulse [s]: 126

Propellant: P-1
Grain mass [g]: 3.61
Grani length [mm]: 24.25
Port Diameter [mm]: 3
External Diameter [mm]: 11,8

Environmental data:
Atmospheric pressure [mbar]: 1019
Air temperature [°C]: 10