Canada's Solar Ship may not replace the Goodyear Blimp, but it can fly after being filled with helium. Solar panels, like on the the Impulse, or onboard batteries car power it up. More importantly, if it had a leak and was air-filled only, it could still land safely. A 33 ft. prototype has already been tested and the company sees the airship as an aid for disaster relief, transferring medical supplies and environmental monitoring. We're thinking that the military would have limited usage, but you never know.