RE: FOAMIE WIND LIMITS?
I also live in a area like that (Chicago)
1. I have 3 foam planes about to your stats, the max I fly in with them is 5 to no more then 8 m.p.h. for no ailerons. I do have one plane with ailerons and it could handle up to 9 to 11 m.p.h.
3. Weight, Power, Shape of wing and prop all factor in.
4. I Have yet to get a low wing foam plane