Wing tip - inside plug fabrication

Used 88g of liquid urethane expanding foam poured onto release play lining wingtip inside surface. The 15x expansion created a good size plug.  Next step, fiberglass wet layup using the plug to press the glass to the wingtip surface.  We may even vacuum bag the plug to the surface so as to minimize epoxy weight and maximize adhesion.

Fabricated wing tip mold plug.