Engine inspection – no cracks in the propellant?

Engine inspection – no cracks in the propellant?
To make sure nothing goes wrong, each propellant assembly of the sounding rockets is visually inspected for possible cracks. In this image Wolfgang Jung inspects the engine of the VSB-30 rocket for the TEXUS 43 mission, launched in May 2006 from Kiruna, in northern Sweden.
Credit:

DLR.

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