John - I agree that foam wings are stronger - they have to be due to their added mass/greater inertia. As far as I know the guys using foam wings are doing so because the average builder can make a foam wing more accurately and faster than a good wood wing.

I've heard the legend of the "light" foam wing for years, but I've never seen one that wouldn't be lighter if it were built of wood. In fact, I've never picked one up that didn't feel like a brick. I'm sure there is a light foamie out there someplace. One day I'll happen upon it.

As far as which is stronger, it's a moot point if both types are strong enough. Personally, I think foam wings are fine for those who want them, but I can build the same wing from wood and it will be lighter.

This is the kind of thing that can go back and forth for the entire thread and since neither of us can substantiate our claims, then make your counter remarks and let's get back to our building.

PS. As long as you're building, it's all cool no matter what it's made of.