As part of my PhD, I'm trying to design and build a UAV. But the UAV needs to a bit durable than your average RC aircraft. Therefore I was thinking about building one from composite materials, Fibreglass, Carbon Fibre, etc. Does anyone have any expertise in this field?I prefer not to vacuum bag. So I'm thinking foam base with fibreglass fabric and epoxy. However, I would like to know the endurance of balsa construction, as well, the UAV I'm building needs to have a long rang (> 3KM).Also it needs all the bells-and-whistles, i.e. Cameras, GPS, Autopilot, FPV, etc. Therefore on top of standard manual RC controls, I'm thinking a PIC microcontroller or PC embedded system to transmit various readings to a ground terminal.