101: Knit like a Mofo
Dear Hank & John
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The R S 25 Engine Is the Same Engine That Was Used on the Space Shuttle, but It's a Much Bigger Engine.
The r s 25 is the same engine that they used on the space shuttle. It burns liquid hydrogen and liquid oxygen to create water. If it kept going that fast, it would go from los angeles to new york in about 15 minutes. And instead of having three of them, the space launch system will have four of them.
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