Originally Posted by Fuji Abound
Out of interest you might also compare and contrast with an aileron roll - no change of heading, positive G throughout so no danger of objects etc flying around, no change of altitude (or perhaps an initial pitch up if you prefer).
There are many variations of the definition of an "aileron roll", but it could rarely be defined with maintaining positive G throughout. It should be a manouver using ailerons ONLY, and thus will result in negative G whilst beyond the vertical. If you want to maintain positive, near +1G, you will be doing something nearer to a very washed-out barrel-roll, which will require either a significant pitch up first (leading to low speed inverted at the top), or a very dangerous nose-low / high speed recovery.