Hello I'm a giant scale Pilot and have absolutely no idea about what tiny glow engine will fit this plane:

I own and fly big airplanes. The smallest one I own is a CMP Pro Cessna 182 with a DLE 20. Since I have no previous experience with 36 inch wingspan planes, thought it would be kinda cool to try something really small and see if how it flies. I don't really want to put an electric motor in this plane but I'm not opposed to it. The box calls for a .049 engine or rubber band power. I'm thinking a .10 to .15 size glow engine would probably be perfect for something this tiny.
Any input I'd appreciate, thanks.
Sophia