A very light breeze at the start gradually picking up to maybe 10 mph or so, kinda hard to judge. But Old Fogey handled it with ease and you can see at one point she stopped dead in her tracks. This was a "test" prototype and has turned out so well I will build another profile Old Fogey this winter to add to the stable. Fuselage is 1" thick home insulation, wing and tail group is Dollar Store foam board. 9X4.7 slow prop, 930kv motor, 20 amp esc and Glacier 3s 1300 battery.