How much power do I need?

goral09

Hi everyone,

I'm thinking about building x-ufo helicopter, and I'd like to know how strong motors I need. I've been looking for some info in the internet but didn't came across anything interesting. Can you help me and show me a book or a site where i can find some tips and infos

I want to lift 2-3kg helicopter.

I know that if I want my helicopter to lift it has to have greater acceleration than g = 9.8 m/s^2, if I want it to stand still motors have to produce enough power to balance the gravity. But these are the most basic laws, what next?

Belginator

Hi there goral09, if you want to lift a 2-3 kg helicopter you need a minimum of 20 - 30 N of lift. Your helicopter doesn't need an acceleration capability of 9.8 m/s^2 technically as that's factored into the Weight, which is W = mg. So in order to hover your Lift needs to equal Weight (W). I can't really help you out on the motors though. You could maybe test a few motors with a prop, and have it pull on a spring scale to see how much thrust is produced, and then deduce how many you would need.