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Originally Posted by Guyute
what do you think the up force would be needed to lift a 130lb robot in the air 12' using a 4.5' propeller. i have an idea that it might be 130lbs of force, but wouldn't the size of propellers matter. if there are any AE's out there could you give me a bit more info...
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There's a rule of thumb that says you need 1 hp to produce 2.5 lb of thrust, so you'd need at least 52 hp to lift 130 lb.