A typical glider has around 100 hook-in points, where the lines connect to its bottom surface. Each hook-in point creates a large amount of drag.
For many years APCO has been using its innovative EHP technology to reduce glider drag and improve performance.
Embedding top lines directly into the bottom surface of the glider, (using APCO’s EHP technology) will significantly reduce drag on each hook-in point to the absolute minimum.
Multiplying this drag reduction over 100 line connection points results in a big performance gain.
The improvement in performance is free of any side effects and is a very efficient way to gain on L/D without sacrificing safety or handling.
Traditional hook-in points are bulky tape loops with knots around them. They act as a forest of disturbances to the airflow under the wing, each creating turbulence around itself, contributing to a thicker turbulent boundary layer at the wing’s surface and greater drag.