O.Thetford, P.Gray German Aircraft of the First World War (Putnam)

D.F.W. Floh (Flea)
  A 1915 prototype of ungainly proportions. Visibility from cockpit was very poor, and the aircraft crashed on test. Engine, 100 h.p. Mercedes D I. Span, 6.2 m. (20 ft. 4 1/8 in.). Length, 4.5 m. (14 ft. 9 1/4 in.). Area, 15 sq.m. (162 sq.ft.). Weights: Empty, 420 kg. (924 lb.). Loaded, 650kg. (1,430 lb.).

W.Green, G.Swanborough The Complete Book of Fighters

DFW T 28 FLOH Germany

  Designed in late 1915 by Dipl Ing Hermann Dorner, newly appointed as chief engineer of the Deutsche Flugzeugwerke GmbH (DFW) of Leipzig-Lindenthal, the T 28 Floh (Flea) was, in appearance, one of the most extraordinary single-seat biplane fighter prototypes tested during World War I. Built under the supervision of Ing Theo Rockenfeller at DFW’s Lubeck-Travemunde subsidiary, the T 28 featured an inordinately deep fuselage in which the 100 hp Mercedes D I six-cylinder water-cooled engine was completely buried. Of wooden construction with fabric-covered wings and wood veneer skinning for the fuselage, the T 28 carried a single machine gun in the forward fuselage above the engine. During the maiden flight a speed of 112 mph (180 km/h) was attained - a noteworthy accomplishment at the time - but minor damage resulted during the landing. Some modifications were made, including the introduction of aerodynamically-balanced elevators, but the authorities evinced no interest in the aircraft and further development of the T 28 was abandoned in consequence.

Max speed, (approx) 112 mph (180 km/h).
Empty weight, 926 lb (420 kg).
Loaded weight,1,433 lb (650 kg).
Span, 20 ft 4 in (6,20 m).
Length 14 ft 9 in (4,50 m).
Height, 7 ft 6 1/2 in (2,30 m).
Wing area, 161.46 sq ft (15,00 m2).