As I started to get into multi-rotor aircraft, I came across the KKMulticopter platform as a good way to build inexpensive practice aircraft. As I looked at the design, I realized that it would be pretty easy to adapt it to a two-prop tilt-rotor design, but before I could begin coding the software for it, they released a firmware for just that! When I saw this video, I knew I was going to have to build one... and that I would use it for evil.
Mr. T is a built on a very simple aluminum frame. There are two Turnigy motors driving counter rotating propellers, that are able to move forward and back under the control of some old servos. The motors are powered by a pair of Turnigy Plush 18amp speed controllers. The KKMulticontroller (I ordered the PCB from them, soldered on the components and programmed the microcontroller with a SparkFun USBtiny.) sits in the middle between the props, while the battery hangs below. It's important to balance the craft properly so it will fly straight (or straightish in this case.) That wire on the top is just to give the head its shape.
This is the KKMulticontroller, behind which sits a 6-channel Futaba reciever. You'll notice that the part of the frame that hangs down isn't centered below the controller, that's to offset the weight of the battery.
This is one of the motor-servo assemblies. That is a cabinet hinge with zip-ties through it to keep it from wobbling. The motor is bolted straight to it. The servo moves the hinge with some stiff wire, and there is a spring to keep it tight. This part could use a lot of improvement, but I wanted to keep it simple and quick.
