Blowholes

Blowholes in a control surface

A very high technology way to control the breakaway point on a laminar flow wing. This is a control surface, with tiny NACA air scoops built into it. These bring pressurised air into the hollow control surface, and the air then emerges out of a row of tiny, high precision holes that cause the airflow on the wing to break away from the wing at that precise point. Performance improvements at this stage of the evolution of gliding come down to such incredible little bits of high precision detailing.