My wind speed limit is determined by the ground handling of a trike gear model.

Too much wind is when the model flips on itself whenever the tail is pointed upwind, while taxing. (This happens around 25 mph (40 km/h) wind for a 5~6 pounds trike, even with down elevator).

Normally, flying is not the problem in windy conditions, but the ground handling. (Except for too light, too draggy and underpowered models).