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When the airflow separates from a surface, the result can be unsteady forces or turbulent wake shedding, neither of which is desirable.

This month’s chronicle of building a Jabiru J250 Light Sport airplane covers the assembly of the wings and tail, and discusses the value of surface preparation.

DAR Mel Asberry talks about doing the airworthiness inspection on the Van’s RV-1.

Basic mold making.