10/31/2009. Official interest in the potential of the triplane configuration for single-seat fighters prompted Pfalz to develop the Dr.I. Powered by an 160 hp Siemens & Halske Sh III eleven-cylinder geared rotary engine, this underwent Typen-Prüfung (type testing) in October 1917. Armed with twin synchronized LMG 08/15 guns, the Dr.I was of sufficient promise to warrant a pre-series evaluation batch of 10 aircraft, all of which arrived at the Front by the end of April 1918. Service pilots considered the Dr.I too slow and its Sh III engine insufficiently reliable for frontline use, and no further examples were produced.

Span: 28 ft 0.67 in (8,55 m)
Length: 18ft 0.5 in (5,50 m)
Height: 9ft 0.67 in (2,76 m)
Wing area: 185.14 sq.ft (17.20 sq.m)
Weight empty: 1,124 lb (510 kg)
Loaded weight: 1,5541b (705 kg)
Max speed: 118 mph (190 kmh) at 13,125 ft (4,000 m)
Climb: to 16,405 ft (5,000m), 13.5 min
Endurance: 1.5 hr