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Published on Apr 3, 2014
Three motors with 12" props pull 850W each to hover this monster tri-copter. A large servo direct-drives the tail motor gimble... that is actually the nose of the craft. 1/2 inch PVC pipe, screws, and decorative tape complete the mix (it could weigh less, but this is a FAST prototype technique). Three 5S 4.5Ah lipo batteries in parallel drain in about 5 minutes at these power levels. The entire craft is flown backwards from a standard tri-copter. This is no problem thanks to the "head-free mode" and magnetic heading available in the MultiWii 2.3 Control system. The noise levels emitted from this tri-copter are significantly more tame than that of the Marty McFly quad-copter of 20lbs. Again, this was simulated before construction with eCalc. Actual results compared well with the simulation.