Questions for other teams/mentors

This page lists questions that our team has for other teams, mentors, or people with relevant experience to share

[Flexible plumbing questions]

The safety guide recommends using bellows-style plumbing for lines that need to bend (R2.2.4.1.3). Where have teams typically sourced this type of plumbing from? The type of flexible plumbing that we are more familiar with is PTFE-lined stainless steel hose. Do any teams have experience using stainless steel hose without a liner for cryogenic fluids? Specifically, we are wondering how leak-prone unlined hose is.

[Combustion Chamber Testing questions]

How long should a “battleship” nozzle (i.e. a simple chamber designed with minimal/no cooling) be test-fired for? We heard that other teams have built and tested stainless steel battleship chambers before. We were interested in pursuing this idea so that we could perform initial testing with a chamber that was easier to manufacture and less expensive to replace than a 3D-printed chamber. Is it recommended to try reusing such a chamber for multiple short firings? Are there any other safety considerations for testing a battleship chamber/nozzle?

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