how to measure the force of the Propeller

[gkio]

i want to calculate what size must to have the propeller and the rotates per second to get grow up X kg
exp i want to grow up 10 kg how i must to calculate what powers i need

 

[GBElectroWeb]

Hi,
You should probably have a look at this calculator : http://www.ecalc.ch/xcoptercalc.php
I'm also starting a blog on quadcopters and will soon put some indications on how you can size it (http://byoq.over-blog.com/)