(Related to my last question on ducting.)
Wires have been used in the past to stabilize wings with a very low weight cost. Could something similar be use to stabilize the arms for a UAV's rotors?
Assuming I don't have enough money to build a custom 8 arm (based on previous advice) carbon fiber frame, could the wiring approach be applied to UAVs? I ask because for a V1 prototype PVC is cheap and relatively strong, but I could enhance it with a bit of aluminum plate in the center and small aircraft cable in tension.