Name me a large airship that has not suffered some catastrophic disaster?
(remember what the sheds at Cardigan were built for?)
Helo wise, how high do you want to go? (and to what end?)
and just how far do you need to fly? (V22 tiltrotor can do 1,000 miles)
Global Hawk has something like a 40 hour on-station time, and a range over halfway round the planet.
Like I said, what's the killer-application?