Let's see......if a Kadet Sr. will fly on a .40, and this thing has 9 of those wings (9x the lift), does that mean this model would fly on a .049 (1/9 the displacement of a .40) Not accounting for drag, of course. In that case, would probably need a 100cc gas engine....or two.

This thing looks like if you took the wings off and stacked them along the sides on each side, and added a paddle wheel to the back, you'd have a Mississippi river boat