RE: What size engine
It is a Yellow Aircraft with a wingspan of about 74". Unfortunately it appears that Yellow no longer carries this model.
I was thinking of an OS 160 but wanted the fuel effieciency of a gasser. But I already have a 40cc on the way for an 80" OMP profile and although a 40 is a good choice for that plane, I do not want 2 of the same engine. I liked the idea of the 50 because of the large number of planes that will take a 50.
Maybe I should sell this Edge. It only flew once, along with the Saito 1.80 I have in it now.