Originally Posted by
kangaroota
NASA are about to test fire 4 RS25 engines together producing 7 megatons of thrust.
My question is, how do you hold the assembly down and prevent damage to the engines straining against the thrust?
I doubt a couple of ratchet trailer tiedowns would cut the mustard.
7 Megatons? Perhaps you mean 7 million pounds..... I was a kid in Huntsville, Alabama back in the moon days; they static tested Saturn F1 engines all the time and they were pretty loud.