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Rs.IV
Role	Patrol flying boatType of aircraft
National origin	Germany
Manufacturer	Zeppelin-Lindau
Designer	Claudius Dornier
First flight	12 October 1918
Status	scrapped
Primary user	Kaiserliche Marine
Number built	1
Developed from	Zeppelin-Lindau Rs.III

The Zeppelin-Lindau Rs.IV (known incorrectly postwar as the Dornier Rs.IV) was a Riesenflugzeug (Giant aircraft) monoplane all metal flying boat with a stressed skin hull and fuselage developed for the Imperial German Navy to perform long range patrols over the North Sea. It had been developed by Claudius Dornier while working for Zeppelin in the town of Lindau.

Development

Two aircraft were ordered by the German Kaiserliche Marine (Imperial Navy) in January 1918. The first flight was made on 12 October 1918 and was converted shortly thereafter into a passenger aircraft sometime between October 1918, following damage sustained during its first flight, and June 1919. When it was modified the pilot's position was moved to the hull instead of in the overhead fuselage in 1919. The sole completed example was scrapped on 17 April 1920 on orders from the Military Inter-Allied Commission of Control, after a detailed examination of its construction had been made; the second example was never completed.

Design

Its design was based on the previous Rs.III, differing primarily in having a narrower hull fitted with sponsons and stressed skin structure, with some minor tidying of the design. It was a braced parasol monoplane with the fuselage mounted on the wing above both engine nacelles and hull. The four engines were mounted in push-pull pairs in nacelles large enough to allow in flight access (a requirement of the original Riesenflugzeug giant aircraft type specification by IdFlieg in 1915) between the hull and the wing. These were staggered to allow propeller disks to overlap slightly so as to reduce adverse yaw when an engine was not running. It had the distinction of being first seaplane to have an all-metal stressed skin hull, and the first seaplane to be fitted with Dornier's patented sponsons.

Operators

 German Empire

Kaiserliche Marine - evaluation only

Specifications

Data from The German Giants

General characteristics

• Crew: 5
• Capacity: (20 passengers in the commercial version)
• Length: 22.7 m (74 ft 6 in) overall
• Hull length: 14.2 m (46 ft 7 in)
• Hull beam: 3.65 m (12 ft 0 in)
• Sponson width: 8 m (26 ft 3 in)
• Wingspan: 37.0 m (121 ft 5 in)
• Height: 8.37 m (27 ft 6 in)
• Wing area: 226 m (2,430 sq ft)
• Empty weight: 7,237 kg (15,955 lb)
• Gross weight: 10,600 kg (23,369 lb)
• Fuel capacity: 3,000 L (790 US gal; 660 imp gal)
• Powerplant: 4 × Maybach Mb.IVa 6 cylinder liquid cooled inline mounted as tandem pairs, 183 kW (245 hp) each
• Propellers: 4-bladed wooden fixed pitch propellers, 3.1 m (10 ft 2 in) diameter

Performance

• Maximum speed: 138 km/h (86 mph, 75 kn)
• Minimum control speed: 90 km/h (56 mph, 49 kn)
• Endurance: 10 hours
• Time to altitude:
  • 400 to 800 m (1,300 to 2,600 ft) – 14 minutes
  • 400 to 1,000 m (1,300 to 3,300 ft) – 22 minutes
  • 400 to 1,400 m (1,300 to 4,600 ft) – 36.4 minutes
  • 400 to 2,000 m (1,300 to 6,600 ft) – 53.5 minutes
• Wing loading: 46.5 kg/m (9.5 lb/sq ft)

See also

Related development

• Dornier Gs.I
• Dornier Wal

Related lists

• List of flying boats and floatplanes
• List of large aircraft
• Idflieg aircraft designation system
• List of military aircraft of the Central Powers in World War I
• List of military aircraft of Germany by manufacturer

References

Citations

1. ^ Haddow, 1988 pp124–129
2. "The (German) Dornier "Giant Flying-Boat"". Flight. Vol. XI, no. 560. September 18, 1919. Archived from the original on 2016-03-05. Retrieved March 28, 2017 – via Flight Global.
3. "Some Dornier "Milestones" - The Do. Rs. IV, 1917-18". Flight. December 23, 1920. Retrieved March 28, 2017 – via Flight Global.

Bibliography

• Gray, Peter & Thetford, Owen (1987) . German Aircraft of the First World War (2nd ed.). London: Putnam. ISBN 0-85177-809-7.
• Haddow, G W.; Grosz, Peter M. (1988). The German Giants - The German R-Planes 1914-1918 (3rd ed.). London: Putnam & Company. ISBN 0-85177-812-7.
• Kössler, Karl (1985). Dornier - Die Chronik des ältesten deutschen Flugzeugwerks (in German). Friedrichshafen, Germany: Walter Biering GmbH. ISBN 3-925505-01-6.
• Ogden, Bob (1983). Dornier. Flypast Reference Library. Lincs, England: Key Publishing. ISBN 0-946219-05-2. LCCN 0263-5887.
• "Some "Dornier" Milestones". Flight. Vol. XII, no. 625. 16 December 1920. pp. 1269–1273.
• "Some "Dornier" Milestones (concluded)". Flight. Vol. XII, no. 626. 23 December 1920. pp. 1289–1292.
• Rimell, Ray (2009). Dornier Flying Boats. Windsock Datafile. Vol. 136. Berkhampstead, UK: Albatros Productions. ISBN 978-1-906798-03-1.
• Schmeelke, Michael (2020). Zeppelin-Lindau Aircraft of WWI: Claude Dornier's Metal Airplanes 1914–1919. Great War Aviation Centennial Series. Vol. 42. Aeronaut Books. ISBN 978-1-935881-83-4.
• Zuerl, Walter (1941). Deutsche Flugzeug Konstrukteure. München, Germany: Curt Pechstein Verlag.

• 1910s German patrol aircraft
• Military aircraft of World War I
• Flying boats
• Dornier aircraft
• Parasol-wing aircraft
• Four-engined push-pull aircraft
• Aircraft first flown in 1918