The aircraft was designed as a tandem glider for flight training. Test flying was carried out by factory test pilot Richard Bergmann.
The aircraft's 15.11NaN1 span wing has 72 cells, a wing area of 43m2 and an aspect ratio of 5.3:1. The pilot weight range is 160to. The glider is DHV 1-2 Biplace certified.
The design progressed through three generations of models, the Twin, Twin 2 and Twin 3, each improving on the last.