Fokker Dr.I

The Fokker Dr.I, often known simply as the Fokker Triplane, was a World War I fighter aircraft.

The Dr.I saw widespread service in the spring of 1918.

It became famous as the aircraft in which Manfred von Richthofen gained his last 19 victories, and in which he was killed on 21 April 1918.

Variants

V.4

Initial prototype

V.5

First production prototype

V.6

Enlarged prototype with Mercedes D.II engine

V.7

Prototype with Siemens-Halske Sh.III engine

Vagel Grip SP.5 Greif

German post-war two seat copy of the Dr.I.

320 aircraft built.

Specifications

Crew

1

Length

5.77 m (18 ft 11 in)

Upper wingspan

7.19 m (23 ft 7 in)

Height

2.95 m (9 ft 8 in)

Wing area

18.7 m2 (201 sq ft)

Aspect ratio

4.04

Empty weight

406 kg (895 lb)

Gross weight

586 kg (1,291 lb)

Powerplant

1 × Oberursel Ur.II 9 cylinder air-cooled rotary piston engine, 82 kW (110 hp)

Propellers

2-bladed fixed-pitch wooden propeller

Performance

Maximum speed

180 km/h (110 mph, 97 kn) at 2600m

Stall speed

72 km/h (45 mph, 39 kn)

Range

300 km (190 mi, 160 nmi)

Service ceiling

6,100 m (20,000 ft)

Rate of climb

5.7 m/s (1,120 ft/min)

Lift-to-drag

8:1

Zero-lift drag coefficient

0.0323

Frontal area at zero-lift drag coefficient

0.62 m2 (6.7 sq ft)

Armament

Guns

2 × 7.92 mm (0.312 in) Maschinengewehr 08 “Spandau” machine guns.