This one pops up all the time -and I bet some guys figure a scale up "should work"

actually , structurally , things quickly get waaaaaaay out of hand- The model could easily collapse
But if for the sake of going along with the gag - the structure is fine -- the power needed can proove to be a real problem.
The guys who have spent time dealing with the development of RPV projects will have a LOT of info about this aspect of the project
A friend here - flies these things for various outfits --professionally
Some of them were really turkeys and took almost all the visible runway to get into the air .
Some time researching the entire project before any work is done -is well spent.