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Water hammer concerns were raised by BlueShift engineers at the first hot fire attempt, suggesting threads might fail during hot fire. Hand calcs based on modified Hooke’s Law

C=\sqrt{\frac{1}{\rho(1/K+D/(Ee))}}

and Joukowsky

P=\rho CU

1[1K+DEe] and Joukowsky P=CU indicate 995 psi max pressure. SolidWorks FEA indicates 2.2 min factor of safety. https://www.fluidmechanics.co.uk/hydraulic-calculations/water-hammer-surge-analysis/

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