# NASA's Mach 9.6 X-43A 'Hypersonic Scramjet' Is Still An Engineering Marvel

> Just a couple of decades ago, aviation had some rules. If you wanted to fly fast within the atmosphere, you used a jet engine.

- **Source:** [SlashGear](https://www.slashgear.com/1994746/nasa-x-43a-hypersonic-scramjet-history/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=68f03ed25b1817f75b134750)
- **Published:** 2025-10-16
- **Category:** Cars
- **Tags:** #nasa #mach #engineering #hypersonic #marvel #scramjet #atmosphere #aviation
- **Canonical:** http://localhost:4321/a/68f03ed25b1817f75b134750

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._