oh, vtol. wasnt sure what you meant before.
check out what these guys built: http://www.youtube.com/watch?v=ws1VD...eature=related
from what i understand, its very hard to build a rc vtol. when you put strong enough motors, plus a way to vector the thrust....now the craft weighs too much. so you add a bigger battery...then it still wieghs too much....bigger motors...bigger props....you guessed it... weighs too much.
however, there are vids on youtube of guys who have done it after much trial and error.