Well the easiest way to refuel in mid-air was to "land" in mid-air!!http://i579.photobucket.com/albums/ss240/dansky69/USS_Akron_in_flight_nov_1931.jpghttp://i579.photobucket.com/albums/ss240/dansky69/F9C_in_USS_Akron_hangar1932.jpghttp://i579.photobucket.com/albums/ss240/dansky69/716px-XF9C_1_aircraft_hooking_onto_.jpg***edit - found a better pic : http://www.flickr.com/photos/telstar/3322409887/Unfortunately the Akron crashed later with great loss of life and it was never pursued farther.hehehe - how many of ya knew about this little feat of wonder eh??
Vixen,None of the aircraft types in AH were capable of mid-air refueling. Very few of any kind were and the uses for it were very specialized. Saying it was "extensive" is pretty misleading.
You've asked a question, and people have given you the answer in previous posts. Move on.