Comments by "Vikki McDonough" (@vikkimcdonough6153) on "" video.

  1. 3:37 - Although it does make the space shuttle SRBs the most powerful rocket engines ever flown.
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  2. Why haven't there been any liquid-fuelled rocket motors on par with the most powerful solids?
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  3. The RD-170 isn't a single engine, it's four engines sharing a fuel pump.
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