Think of it this way:
If you've got a 1/4 scale (25%) Cub, and the wind is blowing 10MPH--then multiply that by 4 and that would be the same conditions as a real Cub flying in 40MPH winds.
If it's 15MPH and your Cub is 1/4 scale--then that would be a 60MPH wind for the real one. Most small planes are grounded in wind like that. Too dangerous.
20MPH? Do the math. Anyone want to hop in a Cub and go flying in hurricane force winds? Better skip breakfast...................[:'(]
If your flying a 33% Extra in 15MPH winds then it would be like flying shotgun with Patty Wagstaff in a 45MPH wind. I might just pass on that opportunity. Once in a lifetime deal--but you won't catch me in a 1500 pound plane in 45MPH winds. NOOOO WAY.[sm=spinnyeyes.gif]
Don't be scared of wind. Just have a good perspective of what it's really doing--and be prepared to loose the plane if you go out and fly in crazy conditoins. As long as your not going to cry if ya break it--then have at it.