When I first bought my townhouse, I thought the huge park behind was good. Three days after I moved in, I realized it was a testing ground of the RC plane fans. Tens of noisy planes hover arround the area every weekend.
Now for a mental exercise, I have decided to design a RCPlaneHunter to bring them down or destroy them in the sky.
First idea:
A device installed on my kid's 4wheeler, which contains a digcam censor, a powerful uP with some field programmable gate array chips, an air rifle which can shoot a plastic bullet 200 meters, plus some sensors yet to find out. My electronics will detect the speed, direction and height of the plane, determine the firing angle and time of my rifle and fire.
What are the algorithms to calculate the speed, direction and height of the plane?
Any new ideas are also welcome.