Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

Think that’s bad? Look at this thing! https://www.en-former.com/en/mammoth-flywheel-for-irelands-g...

4GJ of stored energy, dischargeable in eight seconds.




Consider applying for YC's Fall 2025 batch! Applications are open till Aug 4

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: