Submission timeline
2007–2026One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderI have heard that it is good practice to always chose the number of teeth of two gears to be relatively prime. This is because there can be impurities in the metal, and if you have a small part of a tooth that is harder than the rest it will erode the opposing gear (there is always some friction going on). By choosing the number of teeth to be relatively prime, the wear and tear is distributed uniformly on the…
Classic sources on gears: - "Spinning Levers", a Jam Handy film.[1] This is a good basic intro to what gears really do. - "Gearology" from Boston Gear.[2] This is what you need to know to buy gears. The original article talks a lot about involute gears, but doesn't explain a key motivation for that tooth form. An involute gear will mesh with a straight-sided rack, which can be thought of as an infinite-radius gear. All gears which will mesh with…
https://news.ycombinator.com/from?site=ciechanow.ski
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 2
- Total points
- 2901
- Total comments
- 228
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking