Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone
- ID
- 12588
- Status
- summarized
- Published
- 09 Aug 2026, 11:08 PM
- Fetched
- 11 Aug 2026, 8:18 PM
- Provider
- Hacker News
- Category
- dev-community
- Original URL
- https://www.techeblog.com/tom-stanton-supersonic-trebuchet/
- Source URL
- https://hnrss.org/best
Summary
- Score
- 2.0
- Created
- 11 Aug 2026, 9:24 PM
- Tags
- Audience
- developers
What happened
Tom Stanton built a gravity-powered trebuchet that launched a 4-gram projectile at 776 mph, breaking the sound barrier using a 40kg counterweight, a variable-diameter pulley drum with a 3:1 ratio, and a 116-gram carbon fiber arm carved on a homemade CNC mill. The key innovation was the pulley system that trades initial torque for rotational speed as the drum winds down, overcoming the free-fall acceleration limit that previously made supersonic trebuchets physically impossible.
Why it matters
This is a fun engineering story but has no practical impact for developers, AI/ML learners, or SaaS founders. No action or decision is required from the audience.
Discussion angle
Skip this one for the weekly segment unless you want a 2-minute fun break — the variable-diameter pulley trick is a neat mechanical engineering concept but has no crossover to software, AI, or startup work.