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Oertz W 5/W 7

Страна: Германия

Год: 1915

Oertz - FB 2/FB 3/W 4 - 1913 - Германия<– –>Oertz - W 6 Flugschoner - 1916 - Германия


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


Oertz W 5
   Engine, 240 h.p. Maybach Mb IV. Span, 180 m. (59 ft. 0 3/4 in.). Length, 11.7 m. (38 ft. 4 5/8 in.). Area, 77 sq.m. (832 sq.ft.). Weights: Empty, 2,018 kg. (4,440 lb.). Loaded, 2,638 kg. (5,804 lb.). Speed, 120-125 km.hr. (75-78.125 m.p.h.). Climb, 1,500 m. (4,920 ft.) in 22 min.


J.Herris German Seaplanes of WWI (A Centennial Perspective on Great War Airplanes 15)


Oertz W5
  
  The Oertz W5 design was similar to the earlier Oertz flying boats but it was larger and more powerful. It featured a three-bay wing and was powered by the 240 hp Maybach Mb.IV. Five boats, Marine Numbers 276-280, were ordered in August 1914, making the W5 the Oertz type constructed in the largest numbers. Production was extremely slow; the first was not delivered until May 1916 and the last was not delivered until February 1918.

Oertz W5 Specifications
Engine: 240 hp Maybach Mb.IV
Wing: Span 18.0 m
Area 77.0 m2
General: Length 10.7 m
Empty Weight 1,580 kg
Loaded Weight 2,250 kg
Maximum Speed: 120 km/h


Oertz W7

  Two examples of the Oertz W7, Marine Numbers 474-475, were ordered in April 1915; they were delivered in May and June 1916. The W7 boats were powered by a 150 hp Maybach Mb.Ill and were similar in configuration to the W5 but were smaller, two-bay boats.


Журнал Flight


Flight, October 9, 1919.

THE OERTZ FLYING BOATS

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   "It was not long before a demand arose for larger and more powerful boats, and the Oertz Works received an order for a series of flying boats, which were to be fitted with 260 h.p. Argus engines. Delivery of these engines was much delayed, and when they were available they proved to have exceeded the estimated weight to such an extent that it was quite out of the question to fit them in the Oertz boats. It was, therefore, decided to fit, instead, the 240 h.p. Maybach airship motors, which were at that time quite new. This was done, and in the autumn of 1915 the first of these boats could be delivered. In spite of the fact that the boats were really too large for the engines' power, which was lower than that for which they were designed, and that the engines were heavier than had been the estimated weight of the Argus engines, the boats were able to pass their acceptance tests. One of these boats is shown in Fig. 5.
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J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Five examples of the Oertz W5, Marine Numbers 276-280, were ordered in August 1914. The W5 was powered by the 240 hp Maybach Mb.IV, giving it much more power than earlier Oertz flying boats.
O.Thetford, P.Gray - German Aircraft of the First World War /Putnam/
Oertz W 5
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Oertz W5 Marine Number 276 on a beaching dolly. The W5 followed the configuration of earlier Oertz designs but was larger and more powerful. Five examples of the W5 were built, making it the Oertz design built in greatest quantity.
Журнал - Flight за 1919 г.
Fig. 5. - Oertz flying-boat of 1915, fitted with 240 h.p. Maybach engine. The machine was designed for a 260 h.p. Argus, but this could not be obtained
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Oertz W5 Marine Number 276 getting ready to take off. All available photos of the Oertz W5 are of Marine Number 276.
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Oertz W5 Marine Number 276; all available photos of the W.5 are of this aircraft, presumably the first aircraft in the series to be completed.
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Oertz W7 MN 475 Maruschka at Borkum in 1916; it was one of two W7 flying boats built. (Photos courtesy Henning Oppermann)
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
J.Herris - German Seaplanes of WWI /Centennial Perspective/ (15)
Oertz W5 SVK Drawing