В.Кондратьев Самолеты первой мировой войны
"ХАЛЬБЕРШТАДТ" D.II/D.III/D.IV / HALBERSTADT D.II/D.III/D.IV
В конце 1915 года КБ фирмы "Хальберштадт Флюгцойгверк" под руководством инженера Карла Тайца разработало первый в мире одноместный истребитель с двигателем жидкостного охлаждения. Цельнодеревянный двухстоечный биплан с полотняной обшивкой получил обозначение "Хальберштадт" D.I. Он был оснащен рядным шестицилиндровым мотором "Мерседес" D-I мощностью 100 л.с. и вооружен синхронным пулеметом LMG 08.
O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Halberstadt D I
Precursor of the later D II-III series machines, the Halberstadt D I appeared in February 1916. It displayed most of the characteristics perpetuated in the series machines; the delicate, angular, "all-moving" tail surfaces; the two-bay wings; in-line engine. It differed predominantly in having unstaggered wings and the radiators mounted on the fuselage sides. Although not confirmed, dimensional data applicable to D II-III was probably common also to the D I. Engine, 100 h.p. Mercedes D I. Armament, one Spandau machine-gun.
W.Green, G.Swanborough The Complete Book of Fighters
HALBERSTADT DI Germany
In the late autumn of 1915, the Halberstadter Flugzeugwerke initiated flight testing of a single-seat fighter evolved by Dipl-Ing Karl Theis from the Halberstadt B II trainer. Apart from some structural reinforcement and the mounting of a single synchronised LMG 08/15 machine gun, the Halberstadt fighter differed from its progenitor primarily in having shorter-span, staggered wings. Two prototypes were built, one powered by a 120 hp Argus As II and the other by a 100 hp Mercedes D I. Both featured a neat, car-type frontal radiator which, it transpired, was to prove ineffectual in summer temperatures and was not to be perfected until 1918. These prototypes were at Adlershof in February 1916, the Mercedes-engined prototype undergoing static load testing, and, at this time, they were designated Halberstadt D I. An order for an initial batch of 12 D I fighters "powered by a 120 hp engine” was placed on 21 March 1916. In the event, the production model of the D I embodied a number of design refinements, and, with a 120 hp Mercedes D II engine, became the Halberstadt D II (which see). The following data relate to the 100 hp Mercedes-engined D I prototype.
Time to 3,280 ft (1 000 m), 4.5 min.
Empty weight, 1,215 lb (551 kg).
Loaded weight, 1,630 lb (739 kg).
Wing area, 258.34 sq ft (24, 00 m2).