The HKdrones are just tricopters but with vectored ducted jets as opposed to exposed exposed blades.

One of the goals (or limits) is to make the drone on the cheap so he is not going to have all the nice UAV features you might read about on DiyDrones. The drone will have a wireless link back to a computer  and camera that will handle some of the high level smarts using OpenCV to do face tracking (targeting).

This is my first real attempt and more of a prototype to test the electronics and programming (smarts) hence the zip ties and duct tape.

MPU wise it is powered by an old Arduino nano clone I have and the code is based off multiwii which I have had to change and cut down a fair bit due to code size memory restrictions. 

For a gyroscopes I am using Wii Motion Plus ($5 off ebay).

For the accelerometers I am using a Wii Nunchuck.($7 off ebay) 

The little brother.
Prototype 3 

It is still very much a work in progress and sports a smaller lighter frame and a more powerful MPU so I do not have to worry about memory restrictions. This little guy is going to use the same motors and electronics so will have the same power but with much less weight. 

For the MPU I am using a Teensy2++ and for the code I am basing it off Baron Pilot 

And now the HKdrone surprise part.

Turret (Very work in progress)  

The drone has a 2.4Ghz wireless camera that links back to a PC running OpenCV with the python wrapper uses face recognition to aim the turret (Similar to this) currently I have it working on a separate board and not wirelessly yet nor weaponized yet nor small enough to mount under the drone, hence very work in progress.