Simple API for WiFli programmable helicopters. Nodecopter for the common (read: cheap) hacker.
👉 https://hyper.fun/c/fa-helicopter/1.3.0
👉 https://hyper.fun/c/carbon-icon-helicopter/1.3.0
👉 https://hyper.fun/c/tabler-helicopter/1.3.0
It provides few simple formulas for estimating helicopter rotor parameters in hovering flight. Those should be use only as a rule of thumb only, for getting the very initial idea.