Originally Posted by PBL
Does the aircraft rise vertically? (...) What do you think?
Yes, initially. In the longer term, you need to take care of drag and moments. It's called powered lift. The FAA has even proposed a set of regulations for large airplanes using that principle. The Breguet 49something (forgot the number) came in that category.
Any chance of returning to subject?
regards,
HN39