I believe UAV challenges are great ways to push this technology and just heard about this one from the latest podcast episode from Randy Goers at The Drone Radio Show. Organized by the accelerator Kryptolabs this is a delivery challenge to push the duration and payload capabilities of UAVs. There are 2 categories using either batteries or hydrocarbon.
Fixed wing capable of carrying 15kg for 45 mins for battery powered or 50kg for 360 mins if hydrocarbon powered
Multi-Rotor capable of carrying 50kg for 45 mins for battery powered or 50kg for 180 mins if hydrocarbon powered