Someone please help me to get this idea out of my mind by explaining why this would not work! I’ve searched the forum and do not see any related posts.
The idea is to create an e-foil without a propeller by implementing other forms of propulsion, like pumping motion or oscillating foils or dragonfly motion. This will remove the drag and danger of the propeller.
One idea is to oscillate rear wing foil (stabilizer) like a dolphin tail. Another idea is to make front wing move like a dragonfly wings. Or create a mast with extension/contraction motion to provide a pumping action (the pitch of the foil can be created by a swivel or soft wing).
Here are some examples;