Fokker DR-1
The type DR-1 was Fokker's reaction to the success of the Sopwith-Triplane which was noted for its high rate of climb and its agility. Fokker built a fighter in the same class of planes which could compete with existing Allied fighters. The first DR-1's began to reach fighter squadrons during august 1917 but were suspended from operations from October till December to rectify a fault in the wing construction. A number of celebrated German Pilots flew the DR-1 among whom Manfred von Richthofen, the "Red Baron" who gave the plane its fame. Von Richthofen made his eightieth victory before he was killed whilst flying a DR-1. 
It is agreed that a DR-1 is a pleasure to fly but a difficult plane to land, or rather for the pilot to remain in control over the plane after touchdown as it will easily swing into the dreaded "groundloop". For that reason wooden sticks were mounted under the lower wings  to prevent the tips from touching the ground and being severely damaged.
The twin machineguns fired through the propeller circle without hitting the blades, made possible by an interrupter gear which caused the guns to stop firing at the right time. Although Fokker may not take credit for inventing the mechanism, he perfectioned it and was the first to apply it to his aeroplanes.
Specifications
Production: 1917-1918, 320
Engine: 110 pk Le Rhone or Oberursul VR II rotary
Maximum speed: 165 km/hr
Weight: empty 406 kg, max. 585 kg.
Dimensions: wingspan 7.20 m, length 5.77 m
The Early Birds Fokker DR-1 (2x)
Early Birds are in possession of two nearly identical DR-1's. One, painted in a green/red colourscheme, was built as a NVAV* restoration project and bears the Dutch registration PH-DRI. It has a German Siemens radial engine. The other is registered PH-EBF and was one of te very first Fokker Triplane replica's flying in the United States (as N5505V) It is powered by a 165 hp Warner radial.
Both Fokkers are in the testing stage. One has made a short flight. Because of the critical landing characteristics further testing has to be postponed until Lelystad Airport has a grass runway of sufficient length. Expectations are that this will be the case around mid-2003.

NVAV: Nederlandse Vereniging van Amateur Vliegtuigbouwers. (The Dutch Homebuilders Association)
More pictures (click to enlarge)