We've got scale models that can do 100mph and have wing loadings in the 30oz/sq.ft and greater.

Very few of our models are designed to carry loads and that means our wing loadings are going to be what flies decently. But scale models often are our heavy models. The better flying ones will be around 25oz/sq.ft But you'll see 'em right up to 40.

My F6F is 26oz/sq.ft and was clocked at 101mph a couple of weeks back. It's a lightweight for a scale model. Maybe a scale builder will provide a better picture of what they consider too much.