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The Ridiculous Engineering Of Jet Engines

Veritasium · 16.9M views · 2025-11-17 · 39:34

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Overview

Veritasium explains how jet engines run hotter than their components' melting points, using cooling air and single-crystal superalloy turbine blades. It covers how the blades are grown as aligned crystals.

On Hacker News

Commenters send it to people asking how engines survive such temperatures, and call it fascinating and worth watching.

Recommended by 2 HN people across 2 months · HN mentions 2025–2026

Topics

Aviation & aerospace engineeringMaterials scienceMechanical & precision engineering
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jet enginessuperalloyssingle crystal bladesturbine coolingveritasium

What people said

beambot · 2026-07 · Strong recommendation

The Veritasium video on how jet engine turbine blades are "grown" in an aligned crystalline structure for enhanced material properties (e.g. thermal performance) is absolutely fascinating & well worth a watch: [VIDEO]

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hnuser123456 · 2025-11 · Recommendation

I know Veritasium gets posted here a lot, but a few days ago he posted a deep-dive into the the engineering of jet engine turbine blades. Turns out they're made from a single crystal of a superalloy that entangles itself at a molecular level such that it actually gains strength as it's heated, only losing strength above 1200 degrees C / 2200 degrees F. Below that temperature, as long as the strain on the part is below the plastic deformation threshold, it's not really losing any strength at all over time. [VIDEO]

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dylan604 · 2026-05 · Reference

Just yesterday, someone posted a link to a Veritasium video[0] explaining how a jet engine internal temps of 1500°C work when the components have a melting point of 1250°C. I couldn't imagine doing that at a small scale by hobbyists. [0] [VIDEO]

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Sources

Video by Veritasium, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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