An Ardupilot powered hexacopter delivers a rover on a volcano research autonomous mission, made possible by lead Arducopter developer Randy Mackay

More information about this project can be found here. Images source:

Nagatani, K., Akiyama, K., Yamauchi, G., Otsuka, H., Nakamura, T., Kiribayashi, S., ... & Mackay, R. (2013). Volcanic Ash Observation in Active Volcano Areas using Teleoperated Mobile Robots. In International Symposium on Safety, Security, and Rescue Robotics (SSRR 2013).