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Siemens-Schuckert R.VI

German bomber aircraft

R.VI
The R.VI after a forced landing
Role	Bomber Type of aircraft
National origin	Germany
Manufacturer	Siemens-Schuckert
Designer	Bruno and Franz Steffen[1]
First flight	c. April 1916[2]
Number built	1[2]
Developed from	Siemens-Schuckert R.I

The Siemens-Schuckert R.VI was a bomber aircraft built in Germany during World War I.^[3][4] It was one of six aircraft based on the Siemens-Schuckert R.I, which were originally intended to be identical. Each developed in a different direction and were designated as different aircraft types by the German Inspectorate of Flying Troops (the Idflieg).^[5]

Development of the R.VI benefited from the experience that Siemens-Schuckert and the Idflieg had gained with the R.II, R.III, and R.IV, particularly in its choice of powerplants, where the R.VI was spared from the troublesome Maybach HS engine.^[2] The R.VI was the first of the Siemens-Schuckert R-type aircraft to reach service,^[2] and saw service on the Eastern Front between July 1916 and November 1917, before it was declared obsolete and dismantled.^[6]

As designed, the R.VI was a large three-bay biplane with unstaggered wings of unequal span and a fully enclosed cabin.^[7] Three 180-kW (240-hp) Maybach HS engines were mounted internally in the fuselage, and transmitted their power via driveshafts to two propellers mounted tractor-fashion on the interplane struts nearest the fuselage.^[8] The main undercarriage consisted of divided units, each of which carried dual wheels, and the tail was supported by a pair of tailwheels.^[7] The fuselage was forked into an upper and lower section, which allowed a clear field of fire to the rear of the aircraft.^[1]

The Maybach engines had been a never-ending source of trouble on the R.II, R.III, and R.IV, and by June 1916, Siemens-Schuckert had obtained permission from the Idflieg to substitute Benz Bz.IV engines on the R.III^[9] The firm made the same change on the R.VI, which was under construction at the time.^[2] The fuselage was modified to accommodate the new powerplant, and an extra bay was added to the wings, increasing their span.^[2] Upon completion, designer Bruno Steffen piloted the R.VI on a test flight in which the aircraft carried a 2,400-kg (5,300-lb) load for six hours,^[2] a world record at the time, but one which was never publicised due to the war.^[2]

Despite this remarkable flight, the R.VI did not meet the specifications issued by the Idflieg in its contract with Siemens-Schuckert. Therefore, the Idflieg opted to relax the original specifications somewhat and complete the purchase of the aircraft.^[10]

The Siemens-Schuckert R.II to R.VII were ordered in the G (Grossflugzeug - large aircraft) series and given serial numbers G.32/15 to G.37/15 respectively. These serials were changed on 13 July 1915 to G.33/15 - G.38/15, for unknown reasons and again on 6 November 1915 to R.2/15 - R.7/15 in the R (Riesenflugzeug - giant aircraft) series, adopting the R.II to R.VII designations.^[5]

Siemens-Schuckert delivered the R.VI to the Riesenflugzeugersatzabteilung (Rea — "giant aircraft support unit") at Döberitz on 20 July 1916.^[10] From there, it was assigned to Riesenflugzeugabteilung 501 (Rfa 501), and joined the squadron at Vilna on 7 August.^[10] It operated there until it was dismantled as obsolete in November 1917.^[6]

Specific details of several operational missions while with Rfa 501 have survived:^[11]

• 3 September 1916 — railway station at Molodeczne
• 4 September 1916 — unknown target

Additionally, the R.VI carried out the following raids together with the R.V:^[11]

• 19 January 1917 — troop camp at Iza
• 30 January 1917 — railway station at Wileyka
• 8 February 1917 — railway station at Molodeczne
• 12 February 1917 — railway station at Zalesie

together with the R.VII:^[11]

• 2 March 1917 — railway stations at Zalesie and Molodeczne
• 7 March 1917 — railway stations at Wileyka and Molodeczne
• 16 March 1917 — troop camp at Iza

and together with the R.IV and R.VII:^[11]

• 1 April 1917 — town of Naracz
• 5 April 1917 — railway station at Wileyka
• 5 June 1917 — troop camp at Biala
• 18 June 1917 — supply dump at Overky
• 2 August 1917 — reconnaissance mission over railway station at Prudy

Data from Kroschel & Stützer 1994, p.141

General characteristics

• Crew:4
• Length: 17.7 m (58 ft 1 in)
• Wingspan: 33.36 m (109 ft 6 in)
• Height: 4.6 m (15 ft 8 in)
• Wing area: 177 m² (1,910 sq ft)
• Empty weight: 5,250 kg (11,550 lb)
• Gross weight: 6,660 kg (14,650 lb)
• Powerplant: 3 × Benz Bz.IV , 150 kW (200 hp) each

Performance

• Maximum speed: 132 km/h (83 mph, 72 kn)
• Range: 720 km (450 mi, 390 nmi)
• Service ceiling: 2,950 m (19,400 ft)

Armament

• 3 × 7.9-mm machine guns
• 500 kg of bombs

Wikimedia Commons has media related to Siemens-Schuckert R.VI.

• Gray, Peter; Owen Thetford (1962). German Aircraft of the First World War. London: Putnam.
• Haddow, G.W.; Peter M. Grosz (1962). The German Giants: The Story of the R-planes 1914–1919. London: Putnam.
• The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing.
• Kroschel, Günter; Helmut Stützer (1994). Die Deutschen Militärflugzeuge 1910–1918. Herford: Mittler.
• Taylor, Michael J.H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.