Positive Specific Momentum

2012, Teich, Interaction of explosions with flexible structures (2.27)

i^{+} = 2.1 \cdot \frac{R}{Z^{2}}

i⁺	Positive specific impulse [kPa ms]
R	Distance to the explosion center [m]
Z	Scaled distance [m/kg^1/3] for Z > 2.8

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