O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Pfalz D VII
Two versions of the Pfalz D VII were built and differed only in engine installation and cowling arrangement and in that the second machine, with the Oberursel engine, had overhung, balanced ailerons.
Engine, 160 h.p. Siemens-Halske Sh III geared rotary. Span, 7.52 m. (24 ft. 8 1/8 in.). Length, 5.65 m. (18 ft. 6 1/2 in.). Height, 2.85 m. (9 ft. 4 1/8 in.) Area, 17.2 sq.m. (186 sq.ft.). Weights: Empty, 520 kg. (1,144 lb.). Loaded, 715 kg. (1,573 lb.). Speed, 190 km.hr. (118.75 m.p.h.) at 4,000 m. Climb, 6,000 m. (19,680 ft.) in 25.25 min.
Engine, 160 h.p. Oberursel U III rotary. Span, 8.1 m. (26 ft. 7 in.). Length, 5.55 m. (18 ft. 2 5/8 in.). Height, 2.7m. (8 ft. 10 1/4 in.). Area, 17.2 sq.m. (186 sq.ft.). Weights: Empty, 483.5 kg. (1,064 lb.). Loaded, 738 kg. (1,624 lb.). Duration, l 1/2 hr. (both types). Armament, twin Spandau machine-guns (both types).
Pfalz D VIII
No less than three variants of the D VIII existed, powered with 160 h.p. Siemens-Halske, 160 h.p. Oberursel and 140 h.p. Goebel, the latter version differing in having horn-balanced ailerons and "N" format interplane struts. The machines were built early in 1918 and participated in the second D types Competition. A small production order was given for the Siemens-engined variant. A total of forty machines were completed; some nineteen were at the Front by August 1918 undergoing operational assessment with Jastas 29 and 56.
Engine, 160 h.p. Siemens-Halske Sh III, 160 h.p. Oberursel U III, 140 h.p. Goebel Goe III. Span, 7.52 m. (24 ft. 8 1/8 in.). (8.1 m. 157/18). Length, 5.65 m. (18 ft. 6 1/2 in.). Height, 2.75 m. (9 ft. 0 1/8 in.). Area, 17.2 sq.m. (186 sq.ft.). Weights: Empty, 543 kg.(1,195 lb.); loaded,738 kg. (1,624 lb.), Sh III variant. Empty 495.6 kg. (1,090 lb.); Loaded, 685.6 kg. (1,508 lb.), U III variant. Empty, 552.7 kg. (1,216 lb.); Loaded, 722.7 kg. (1,590 lb.), Goe III variant. Climb, 1,000 m. (3,280 ft.) in 1.9 min., 6,000 m. (19,680 ft.) in 25 min., Sh III variant; 1,000 m. (3,280 ft.) in 21 min., 5,000 m. (16,400 ft.) in 25.5 min., U III variant. Duration, 1 1/2 hr. Armament, twin Spandau machine-guns.
W.Green, G.Swanborough The Complete Book of Fighters
PFALZ D VII Germany
A further Pfalz contender in the first D-type Competition, the D VII single-bay staggered biplane passed its Typen-Prufung in February 1918, but was not the recipient of a production contract. The D VII was tested with both balanced and unbalanced ailerons, with two-bladed and four-bladed propellers, and with at least three engines: the 160 hp Siemens Halske Sh III, the 160 hp Goebel Goe III and the 145 hp Oberursel U III. Armament consisted of the standard twin LMG 08/15 machine guns. The following data relate to the Sh III-powered model.
Max speed, 118 mph (190 km/h) at 13,125 ft (4 000 m).
Time to 19,685 ft (6 000 m), 25.25 min.
Endurance, 1.5 hrs.
Empty weight, 1,146 lb (520 kg).
Loaded weight, 1,576 lb (715 kg).
Span, 24 ft 8 in (7,52 m).
Length, 18 ft 6 1/2 in (5,65m).
Height, 9 ft 4 1/4 in (2,85 m).
Wing area, 185.14 sqft (17,20 m2).
PFALZ D VIII Germany
A contender in the second D-type Competition at Adlershof in May 1918, the D VIII was in all respects similar to the D VII apart from having two-bay wing bracing. The slightly raked wings were of equal parallel chord with slightly splayed interplane struts, and a standard Pfalz-type wooden structure was employed, with a semi-monocoque fuselage. The Typen-Prufung was performed in January 1918, with a D VIII powered by a 160 hp Siemens Halske Sh III 11-cylinder rotary, but one of two D VIIIs participating in the D-type Competition had N-type interplane struts, horn-balanced ailerons and a 160 hp Goebel Goe III engine. Limited production of the Sh III-powered D VIII was undertaken, this being introduced to squadron service in June 1918, but by the end of August only 19 fighters of this type were at the Front, a total of 40 having been built. A D VIII was tested with a 145 hp Oberursel U III engine and another with a Rhemag R II driving counter-rotating propellers, but only the Sh III version saw service. Armed with two LMG 08/15 machine guns, the D VIII possessed pleasant handling characteristics and offered a good standard of manoeuvrability and a high climb rate, but it suffered a weak undercarriage. Data relate to the Sh III-powered D VIII.
Max speed, 118 mph (190 km/h).
Time to 9,840 ft (3 000 m), 3.1 min.
Endurance, 1.5 hrs.
Empty weight, 1,197 lb (543 kg).
Loaded weight, 1,627 lb (738 kg).
Dimensions as for D VII.