I'm a university student and have to build a UAV that is capable of carrying a 100g payload and must have a total mass of under 7kg. It will be powered with an electrical motor, a speed controller and a lithium battery of maximum 2200mAh capacity.

The model will have machined / ordered parts and I was looking for more information on what materials would be suitable for the fuselage to make it lightweight but sturdy.

Thanks for any info