One of my lecturers showed me a model airplane he build from scratch using nothing but styrofoam, duct tape, hot glue, a bit of wood and some R/C stuff.
I also wanted to build something like that but place also a bit more of electronics inside.
So I decided to go for an F-14 ;) The plans on how to cut those planes can be found online.
The first step was to read in the PWM signals from the R/C receiver which turned out to be more difficult than expected as they overlap. I implemented an delta mix for the Elevons. I used 2x1-Axis accelerometers to implement some auto stabilization as I had never have flown an model airplane before ;) I had a lot of problems with vibrations which appeared as massive noise at the output of the accelerometers but I was able to filter that out using a Lowpass filter.
This project is the first step towards a bit more complex UAV and the intention was to gather knowledge about how to build up a (very unstable) plane and how to fly it.