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I bought an ArduPilotMega 2.0 - want to build a quadrotor - now what? Answered

So, I'd like to build a quadrotor.  I looked at plans out there and it seemed that an ArduPilotMega 2.0 controller was cheaper than the old ArduPilotMega + IMU board, and more advanced.  So I bought it.  But I don't understand a lot of the terminology the RC / UAV crowd throws around, all I know is it's basically an Arduino - which I have used - with special logic for flight stuff like gyros and multiplexing.  Besides that, I don't know where to start.  I know I need to get some lightweight brushless DC motors, radios and a radio controller unit.   but what type, etc.. ?   Where do I start?


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