Thursday, December 28, 2017

Converged Drone IoT Developer's Platform

I installed the most popular quadcopter motor on the most popular hobby helicopter for IOT/MQTT/COAP research, and see what happened.

It flew for 20 minutes straight, longer than any commercial drone of the same weight on the market. Other than that, it doesn't fly much differently from other 250 size helis sold by stores/vendors. 3S, 11.1 volts lifts the 250 grams(including Raspberry Pi Zero) take-off-weight. The fuselage is Blade230 or Blade BSR body, main motor is T-motor 4004 or Emax 2808, intended for 650 sized quadcopters. Main rotor is 210 sized helicopter parts from Oxy2 helicopter. Tail motor is the popular 1306 size, 3100kv, intended for 140 sized quadcopters, tail prop is bull-nose cut from a 5040 prop.

The helicopter fuselage is cheaper, at less than 7 dollars including shipping, than a quadcopter main frame. The quadcopter motors and props are cheaper. The complexity of the system is the same as a quadcopter with 4 pairs of folding blades. Either this helicopter, in direct drive configuration, or DJI Mavic Pro has exactly 16 moving parts of the vehicle itself. They are the main motor, tail motor, 3 CCPM servos, 2 folding blades, 2 grips, 2 halves of the swashplate, 5 linkage rods. And on the DJI Mavic Pro, they are 4 motors, 4 folding arms, 2 folding blades for each motor. So, the math is 2+3+2+2+2+5 = 16 = 4+4+2x4 .

Part listing is in the following table. Shipping discount for multiple items from a vendor has been applied. No volume discounts are used.

The entire craft can be built without a machineshop. All built in my car in between commutes. Only used light hand tools and light electric tools that can be powered from car battery.

CC3D configuration for LibrePilot 16.09 is at
(taranis x7 transmitter)
(flysky i6x transmitter)
And the working videos follow,

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