Aero Synergie no longer offers the D20.
The aircraft complies with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low wing, two seats in a side-by-side configuration enclosed cockpit, a choice of tricycle landing gear or conventional landing gear and a single engine in tractor configuration.
The aircraft has a wooden airframe covered in doped aircraft fabric. Like most Jodel designs its 7.51NaN1 span wing employs dihedral in the outer half only. Standard engines used are the 1000NaN0 Rotax 912ULS four-stroke and the 850NaN0 Jabiru 2200 powerplant. Other engines of similar power output can also be used.
Reviewers Robby Bayerl et al. describe the aircraft as possessing "great performance and impeccable behaviour in flight".