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I was excited to see that one of the shingles comprising the inner wall of the nozzle extension was damaged. This showed the double-walled construction of the extension and the "Z bar" supports separating the two walls. Picture 1 of 3. Apparently, this amount of shingle damage isn't that unusual. According to page 1-125 of the F-1 Rocket Engine Operating Instructions [direct link to 324M PDF] (p. 176 of the PDF itself), "Engine Damage Limits,"
It looks like the shingle's been pulled away from three adjacent Z-bars, but even with this amount of damage, the nozzle extension is nearly flight-ready. | ||||||||||||||||
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