O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Albatros D XII (with Bohme undercarriage)
At least two D XII prototypes were built. D 2210/18 was first flown in March 1918 and participated in the second D types Competition. A modified machine fitted with a Bohme undercarriage which featured compressed-air shock absorbers flew in April 1918. This undercarriage necessitated an additional strut, which may just be observed running vertically above the wheel in the above photograph. The D XIIs again featured the slab-sided ply-covered fuselage introduced with the D X. There was again a variation in the ailerons, the Bohme undercarriage machine having unbalanced ailerons of inverse taper, and D 2211/18 having overhung balanced ailerons of parallel chord. Engine, 160 h.p. Mercedes D III. Span, 8.2 m. (26 ft. 10 7/8 in.). Length, 5.785 m. (18 ft. 11 3/4 in.). Height, 2.8 m. (9 ft. 2 1/4 in.). Area, 19.84 sq.m. (214 sq.ft.). Weights: Empty, 580 kg. (1.276 lb.). Loaded, 760 kg. (1,672 lb.). Speed, 180 km.hr. (112.5 m.p.h.). Climb, 8,000 m. (26,240 ft.) in 54 min. Duration, 1 hr. Armament, twin Spandau machineguns.
The second D XII (2211/18) was fitted with B.M.W. IIIa engine of some 185 h.p. and participated in the third D types Competition in October 1918.
W.Green, G.Swanborough The Complete Book of Fighters
ALBATROS D XII Germany
The last Albatros fighter of World War I actually completed and flown, the D XII featured the slab-sided plywood-covered fuselage introduced by the D X, and the first of two prototypes was flown in March 1918 with a 180 hp Daimler D IIIa engine. The second prototype, fitted with a Bohme undercarriage embodying compressed-air shock absorbers, and unbalanced ailerons of inverse taper in place of the balanced parallel-chord ailerons of the first prototype, followed in April 1918, and was later fitted with a 185 hp BMW IIIa engine for participation in the third D-type contest of October.
Max speed (D IIIa), 112 mph (180 km/h).
Endurance, 1 hr.
Empty weight, 1,279 lb (580 kg).
Loaded weight, 1,675 lb (760 kg).
Span, 26 ft 10 3/4 in (8,20 m).
Length. 18 ft 11 1/2 in (5,78 m).
Wing area, 213.55 sq ft (19,84 m2).