Hacker News new | past | comments | ask | show | jobs | submit login

I’ve often wondered what the efficiency of these fully mechanical systems is, and whether a completely electric system (without a battery or other energy storage) would be more compact, lightweight and efficient at allowing human powered hovering.

Here is an Olympic cyclist making toast https://www.welovecycling.com/wide/2016/10/07/olympic-cyclis...

A Toaster like any other resistive heater is about as efficient as it gets in terms of power efficiency.

This guy won't make any copter fly, unless loosing 50kg.

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