It is a very common article, but not discussed here on the forum..

http://www.progressiveengineer.com/profiles/maynardHill.htm
http://www.sciencenewsforkids.org/2003/12/model-plane-flies-the-atlantic-2/
http://en.wikipedia.org/wiki/The_Spirit_of_Butts_Farm


or download PDF:
http://aerospaceindustrynews.webs.com/Model%20Airplane%20News.pdf

http://www.rcindia.org/chatter-zone/smithsonian-museum-acquires-the-tam-record-breaking-rc-plane/

Impressive.     

Some more details on Auto Pilot used would have been nice.

Yes sundaram sir.
actually i was looking for the switching mechanism from autonomus flying to RC and vice versa..
Couldn't find it to satisfaction..

All Autopilots have provision for switch over from manual mode to Auto pilot mode. I was looking at which one he could have used. For such a Long range definitely not the most commonly available hobby grade ones.