Hey Andrew

The new 26cc RCGF is a great engine, but I think I will be a little underpowered for your plane. I am not sure of the weight of the Erobat, but an 84" wing just calls for a 45cc - 50cc engine.
The RCGF 45cc is a great puller. The new engine model has a rear carb setup and the power output if better than the side mounted carb.

I have my 26cc in a big ole UGLY STICK. Way overpowered, but a LOT of fun! (76" wingspan and about 9 pounds )
Enjoy your engine and plane.