Ah I see, my comments were in regards to shooting from a small plane through the perspex window.
Probably not the kind of thing your looking at shooting though. Good luck with your search for info, and thanks for the comments on my bird pics.
take a look at copterworks.com in the states for rc helicopters set up with camera rigs.
heres one example of that type of equipment in use: http://vimeo.com/13774420
not cheap though! looking at around $15k for the kit (excl. camera).
Sophie, I use an elevated mast system for low level aerial photography, but know several guys who used unmanned aerial vehicles (UAV's) for this as well. As has been said they aren't cheap and at least two of my friends paid over £20K for their systems.
....i'm focusing on RC helicopter. ....
What is the license requirements for a system such at the RC Airship....
i am not sure about your friends used system but i'm focusing on RC helicopter. i got some info and i will share if anyone was interested in...