I am starting to carve the foam core for the MTB frame. I couple of things that I am re-learning. Styrofoam is easy to find but not so easy to carve and fair. I am using 2" Dow Blue Board for this attempt, and it is working though not quite as well as I would like. I just ordered some 1" polyurethane foam sheets, from Aircraft Spruce for attempt #2. For now, I have a styrofoam core cut and I am in to delicate process of fairing it. It looks like having a foam core is going to add about weigh 4 ounces extra unless I decide to dissolve it out when I am done. It is going to take some creative thinking to get the eccentric chain and seat stays into position before they are laminated.
Chain Stay blocks attached.
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