In a college engineering class we produced (in teams) rockets emitting mach-diam... | Hacker News

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		kaonwarb on Feb 10, 2021 \| parent \| context \| favorite \| on: Kenyan recycles plastic waste into bricks stronger... In a college engineering class we produced (in teams) rockets emitting mach-diamond exhaust consisting of nothing more than HDPE rods bored in specific patterns, supplied with pure oxygen, and ignited.

rootusrootus on Feb 10, 2021 [–]

> supplied with pure oxygen

That is key. A lot of things make a hell of a flame when you supply them with pure oxygen.

mikewarot on Feb 10, 2021 | [–]

A thermic lance is a steel tube with pure oxygen fed down the bore. Here's how to make one out of a length of automotive brake line. https://youtu.be/EA-VCaBUsCA

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