Flight, June 1924

THE THIRD INTERNATIONAL AERO SHOW AT PRAGUE
THE GERMAN EXHIBITS

DIETRICH-GOBIET FLUGZEUGWERK, CASSEL

   The "D.P.IIA" is a two-seater school machine. Originally the machine was a biplane with pure cantilever wings, but as exhibited a pair of N struts had been added, probably mainly to stiffen the wings against torsional loads, as there is no external wing lift bracing. The fuselage is of welded steel tube construction, very similar to the Fokker machines, and is covered with fabric, except the front portion near the engine, which is covered with aluminium. The wings are of usual wood construction, and the top plane only is provided with ailerons (balanced). The top plane is supported from the fuselage on each side by a steel tube tripod to the front spar and a single strut to the rear spar, exactly as in the well-known Fokker "D.VII." The seven-cylinder Siemens engine, of 75-80 h.p., is mounted on a steel structure in the nose of the fuselage, and is cowled-in all except the cylinder heads. The pilot and passengers are placed in tandem, the pilot occupying the rear seat, so that the presence or absence of a passenger does not affect the trim of the machine. The main dimensions of the "D.P.IIA" are: Length, o.a., 5-9 m. (19 ft. 5 ins.); wing span, 7-2 m. (23 ft. 7 ins.); wing area, 16-32 sq. m. (176 sq. ft.); weight of machine empty, 400 kgs. (880 lbs.); useful load, 220 kgs. (484 lbs.); total loaded weight, 620 kgs. (1,364 lbs.); wing loading, 7-75 lbs./sq. ft.; power loading, 17 lbs./h.p.; maximum speed, 160 kms./h. (100 m.p.h.); range, 525 kms. (325 miles); time to 1,000 m. (3,300 ft.), 6 mins.; ceiling, 3,850 m. (12,600 ft.).