The Pfalz Dr.I was a German fighter prototype of World War I. Official interest in the potential of the triplane configuration for single-seat fighters prompted Pfalz to develop the Dr.I. It underwent initial testing in October 1917, and an initial batch of 10 aircraft were shipped to the Front and arrived in April 1918.
Service pilots involved in testing the Dr.I considered it too slow and its Sh III engine too unreliable for frontline use and no further examples were produced. Jasta 73 was equipped with this aircraft in 1918.
Powerplant: 1 × Siemens-Halske Sh.III, 119 kW (160 hp)
Propeller: 2-bladed fixed-pitch
Wingspan: 8.55 m (28 ft 1 in)
Wing area: 17.2 m2 (185 sq ft)
Length: 5.5 m (18 ft 1 in)
Height: 2.76 m (9 ft 1 in)
Empty weight: 510 kg (1,124 lb)
Gross weight: 705 kg (1,554 lb)
Maximum speed: 190 km/h (120 mph, 100 kn) at 4,000 m (13,123 ft)
Service ceiling: 6,000 m (20,000 ft)
Time to 1,000 m (3,281 ft): 1 minutes 42 seconds
Time to 3,000 m (9,843 ft): 6 minutes 12 seconds
Time to 5,000 m (16,404 ft): 13 minutes 30 seconds
Armament: 2 x synchronised LMG 08/15 machine guns
Crew: 1
All Aero 