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Is pogo oscillation accounted for in design of hybrid motors? I'm thinking particularly about hybrids that use Nitrous Oxide as the oxidizer because the weird triple point effects that one experiences with nitrous.

So, do hybrid designers ever have to consider pogo? Why or why not?

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Asking an expert at my work, the answer is that it's not a strong risk for hybrids. The reasoning is that pogo is typically due to an interaction between a pump and a long vertical run of tubing on a rocket (like where a propellant line goes from the top tank around or through the bottom tank to get to the engine). Since hybrids only have a single liquid tank there typically are not long vertical runs of piping and most hybrids don't use pumps.

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