I am building a UAV and building a computer control system. I am wanting to use a small linux disro (puppy, damn small) so that i need no drives except sd card reader. I am wondering if anyone knew of a flight control program or something that can be motified to work. The basics are that i am gonna use a 3g cell to communicate and for gps, a small decent mother board an amd phenom II processor, 2X 4g ddr2, and a sdcard reader. NO DRIVES- too much weight. I have tested the prototype and it flies. I know a phone isnt instant but thats ok. it will used to give cooridants and to give commands. I plan to have the computer to control, by usb, a control board but want some input before i start building it. Any ideas or suggestions or help would be appreciated. Would it be possible to modify a flight simulator to work in this situation?