djk9

I am trying to figure out how to get a really streamlined surface on a foam wing. Is it possible to monokote foam smoothly or does it come out with divets? I am going to cover them with kevlar ultimately but if I just put kevlar over the foam it finds all the little holes and divets in the foam when I vacuum bag it and doesn't come out very smooth. I know I could probably find some kind of filler for the holes and then sand it down but that adds weight I would rather do without.

rccrazedman

My Feedback: (10)

I read an article in model airplane news a few months back where they have used balsaright filler and sanded it down to smoothen out the foam. They claim it added very little weight. And after they were done smoothing it out they also added monokote stripes and all to juice up the look of their Formosa.

Bax

My Feedback: (11)

With many types of foam, the neat needed to apply MonoKote will also cause problems with the foam. The foam can actually melt at Monokote application temperatures. Use Top Fltie EconoKote to apply on foam. It requires much less heat.

One thing about foam: The quality of your finish is highly-dependent upon the smoothness of the surface it's on. If the foam's not smooth, the covering, of any kind, will 'find' them and be reflected in the final product.

grbaker

My Feedback: (29)

EconoKote will show the individual foam cells also. You may need to consider sheeting the cores with balsa.