This H-copter on steroids has an “all up” weight of 20lbs when you add the “Marty” mannequin and 13.4Ah 5S lipo battery. The chassis is made of 300PSI 1/2in PVC. Each motor can handle 1200W but only takes 640W to hover. The battery acts as a counter-balance below the prop line. Flying time is respectable at over 5 minutes thanks to the 83% efficiency of the 12″ props. It is controlled by multiwii 2.3. Flying is simplified by using the magnetometer in Head Free mode (not available on KK2) The entire system was simulated with eCalc before construction. This was not the first iteration of the design. I explored bi-copter, tri-copter, and dual-copter configurations but ended up with the traditional quad for it’s simplicity and stability.
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