13mph is no big deal for a 5lb .40 sized plane. Heck even 20mph for a .40 plane can be fun!

But a 2lb foamy would be a handful and would probably get tossed around. I won't take my smaller park flyers out if its more than 8-10 mph. They're flyable, but at some point it stops being fun if you're constantly fighting the wind and not really getting to fly it how you want to.