RE: Pusher Prop Thrust Line Offset from Datum Line
The desire to build something different -exists in most of us -
I designed some stuff years back -which were patented and sold by my employers.
One of the issues here is "just how practical is this aircraft design?"
Flying boats are the magnet for plenty of "great ideas"
The setup used on the SeaBee was probably one of the most practical-single engine setups.
I am finishing up a varient of that design -for my new camera model
There are quite a few small rtf models - using this same arrangement - -it is easy to do and resolves most of the problems with pushers.