The DR-109 is a monoplane that features a cantilever low-wing, two seats in a tandem enclosed cockpit under a bubble canopy, fixed conventional landing gear with wheel pants and a single engine in tractor configuration.
The aircraft fuselage is made from welded 4130 steel tubing, covered in sheet aluminum. The tail surfaces feature steel tube spars, sheet aluminum ribs, are covered with doped aircraft fabric and are cable-braced. The 241NaN1 span wing is constructed in one piece and has Douglas fir spars with plywood ribs and covering. The wing employs a Wainfan 16% symmetrical airfoil and has a wing area of 114square feet. The wing has almost full-span ailerons and no flaps. Other features include a 481NaN1 wide cockpit.[4]
The DR-109 can accept engines of 200to. The standard powerplant used is the 2600NaN0 Lycoming AEIO-540-D4A5 six cylinder, air-cooled, four stroke aircraft engine.
The aircraft has an empty weight of 1495lb and a gross weight of 2275lb, giving a useful load of 780lb. With full fuel of the payload is 504lb.
The designer estimates the construction time as 1300 hours.
In November 2013 11 examples were registered in the United States with the Federal Aviation Administration, with another one previously registered and now removed.[5]