3D printing

Assess

Techniques

An additive manufacturing method used to create the custom mouthpiece.

Why it's here

Placed in Assess: 2 article(s) of evidence from 1 source(s), led by product launches, with 2 in the last 30 days. Confidence 32%.

7Hacker News·8/9/2026research
Gravity-powered trebuchet breaks the sound barrier
Tom Stanton built a gravity-powered trebuchet that reportedly launched a 4-gram projectile at supersonic speed, becoming the first such machine to cross the sound barrier using only gravity. The design used a pulley ratio, a lightweight carbon-fiber arm, and iterative stress testing to increase rotational speed and efficiency before the final successful run.
7Hacker News·7/25/2026product_launch
MouthPad: A Tongue-Controlled Hands-Free Touchpad
MouthPad is a custom-fit in-mouth touchpad that converts subtle tongue and head movements into cursor control, clicking, scrolling, and dragging over Bluetooth. It is designed for discreet everyday use and accessibility, with a custom dental scan and 3D-printed form factor tailored to the user.