Hey there. I am working on prototyping a large drone like craft, however, the problem that I am facing is that there seems to be no equation or series of equations that tells me the direct relationship between rotary size and number of rotors needed to lift the known weight of my craft. Does anyone have any suggestions on where to begin to look?
#Propeller Size to Weight of Craft Equations
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Looking at motor / prop thrust data could be useful for you
by looking at how much thrust certain motor / prop combinations produce you can try to decide on which ones to use given the weight of your craft
why'd that message disappear? 🤔
There is not really a product that has a fair comparison of what we are trying to build, which is why I am looking for some fundamental calculations that relate weight to the surface area of propeller size. The motor size can really be however much or as little horsepower is needed. Thrust is determined by surface area, so it seems like I would need to determine the blade size first to determine what that thrust would be.
that's hard to apply to hobby grade parts, as a prop made for a specific purpose is not likely to match a theoretical model for lift. your best bet is to look at manufacturer's charts over theory calculations.
But the calculation can be found here https://sciencing.com/calculate-lift-rotor-blades-7680704.html