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Airfoil Assistants Fin Airfoil Sanding Blocks


For years, I always wanted some sanding jigs to help me get good airfoils on fins. Eventually I made some jigs that help me get good, consistent airfoils on balsa, plywood and G10 fins. Each block has grooves designed for leading and trailing edges (although rounding both using the leading edge  groove is common for sport models and NCR kits) Here’s what each block was designed for:

Small – 1/32’ plywood and 0.030-0.0625” G10
Medium – 1/16’ -3/32” balsa and plywood

Large – 1/8” balsa and plywood

Colors may vary.