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Zeppelin-Staaken VGO.III

From Alfawiki
Zeppelin-Staaken VGO.III
Company typeHeavy bomber aircraft
IndustryAviation
Founded1916
Headquarters
Germany
ProductsMilitary aircraft


Template:Infobox aircraft

The Zeppelin-Staaken VGO.III was a German heavy bomber constructed in 1916 that saw limited deployment during the First World War. Despite only a single unit being produced, it functioned as a foundational prototype for subsequent Zeppelin-Staaken Riesenflugzeuge ("giant aircraft"). The "VGO" acronym originated from Versuchsbau Gotha-Ost,[1] a subdivision of Gothaer Waggonfabrik. While the earlier VGO.I was acquired by the Imperial German Navy, the VGO.III was procured by the Imperial German Army. Notably, it holds the distinction of being the world's first aircraft powered by six engines.[2]

Design

The design of the VGO.III drew heavily from its predecessors, the VGO.I and VGO.II, retaining their wing structure[3] and incorporating modified elements of their fuselage.[4] Its tail assembly closely resembled that of the VGO.II.[5] The aircraft featured a four-bay biplane configuration with equal span wings and a slight negative stagger.[6] While its overall layout was conventional for the period, it stood out due to its considerable size, biplane horizontal stabilisers, twin vertical fins, and a tricycle landing gear arrangement.[7] The two pilots operated from an open cockpit.[8]

A key advancement in the VGO.III was its engine configuration. Its forerunners suffered from insufficient power,[9] which this model addressed by doubling engine count from three to six,[10] replacing the problematic Maybach HS engines with more reliable Mercedes D.III units.[11][12] Each previous single-engine position now housed paired engines whose output was combined via a gearbox and clutch to drive a single propeller; if one engine failed, it could be disengaged allowing the other to maintain propulsion.[13][14]

One engine pair was mounted in the nose driving a tractor propeller, while two additional pairs were installed in nacelles located between the wings, each driving a pusher propeller.[15] These nacelles were spacious enough to accommodate an onboard mechanic who could access them during flight—a requirement under the Riesenflugzeuge specification. The fuselage incorporated a bomb bay capable of carrying up to 800 kilograms (1,800 lb) of ordnance.[16] Defensive armament included two machine guns mounted within the fuselage—one firing upwards and another downwards—as well as a machine gun positioned at the front of each engine nacelle.[17]

Another advanced feature for its era was the installation of a radio system consisting of a Siemens-Schuckert transmitter paired with a Telefunken receiver.[18][19]

Development

The construction of the VGO.III commenced in October 1915, and although the exact date of its maiden flight remains uncertain, it occurred sometime between 29 May and 4 June 1916. The aircraft was officially accepted for Army service on 28 August and was designated with the Idflieg serial number R.10/15.

During the testing phase, aerodynamic balances were fitted to the ailerons via the interplane struts in an attempt to reduce control forces; however, these proved ineffective and were subsequently removed.

Operational history

The VGO.III was allocated to Rfa 500 (Riesenflugzeugabteilung, meaning "giant aeroplane unit") and completed approximately seven combat sorties. Its targets included railway infrastructure, troop concentrations, and supply depots in the vicinity of Riga. The aircraft’s final sortie, which was a training mission on 24 January 1917, ended tragically. While landing at Auce, a sudden downdraft caused the aircraft to touch down short of the runway. The forward landing gear collided with an obstacle, resulting in the airframe breaking apart. Fuel lines ruptured during the impact, spraying fuel onto the nose exhaust stacks and igniting a fire. This accident marked the first fatal crash involving an R-plane, claiming the lives of five crew members.

Operators

Imperial German Army Air Service
Rfa 500

Specifications

Template:Aircraft specs

References

  1. ↑ Gray & Thetford 1992, p.582
  2. ↑ Szigeti 2007, p.13
  3. ↑ Haddow & Grosz 1988, p.226
  4. ↑ Haddow & Grosz 1988, p.227
  5. ↑ Haddow & Grosz 1988, p.227
  6. ↑ Haddow & Grosz 1988, p.213
  7. ↑ Herris 2020, p.15
  8. ↑ Haddow & Grosz 1988, p.212
  9. ↑ Gray & Thetford 1992, p.583
  10. ↑ Haddow & Grosz 1988, p.226
  11. ↑ Haddow & Grosz 1988, p.226
  12. ↑ Herris 2020, p.64
  13. ↑ Haddow & Grosz 1988, p.226
  14. ↑ Herris 2020, p.64
  15. ↑ Gray & Thetford 1992, p.583
  16. ↑ Haddow & Grosz 1988, p.213
  17. ↑ Haddow & Grosz 1988, p.221
  18. ↑ Haddow & Grosz 1988, p.228
  19. ↑ Herris 2020, p.65

Bibliography

  • Cooksley, Peter. German Bombers of WWI in Action. Squadron/Signal, Carrollton, Texas, 2000.
  • Gray, Peter, and Owen Thetford. German Aircraft of the First World War. Putnam, London, 1992.
  • Haddow, George William, and Peter M. Grosz. The German Giants: The Story of the R-Planes 1914–1919. Putnam, London, 1988.
  • Herris, Jack. Zeppelin-Staaken Aircraft of WWI: Volume 1: VGO.1 – R.VI R.29/16. Aeronaut, Reno, Nevada, 2020.
  • Kroschel, Günter, and Helmut Stützer. Die deutschen Militärflugzeuge 1910–1918 (German Military Aircraft 1910–1918). E. S. Mittler & Sohn, Augsburg, 1994.
  • Szigeti, Martin. "Geburtsstunde der Giganten" (Birth of the Giants). Klassiker der Luftfahrt, no. 4/07, Motor Presse Stuttgart, Stuttgart, 2007, pp. 10–17.

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