Zmaj R-1

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The Zmaj R-1 (Serbian Cyrillic: Змај Р-1) was a twin-engined prototype bomber produced by Zmaj aircraft, designed in the 1930s. The aircraft was never fully put into service due to a number of difficulties in testing.[3][4][5]

Design and development

In the factory the Zmaj 1936 at the initiative of engineer Dušan Stankov (then technical manager) approached the construction of multi-purpose combat aircraft, "the destroyer". After tests in the wind tunnel in Warsaw, has been offered command of the Air Force project, which was adopted on 28 March 1938, and received the official designation Zmaj R-1. His purpose was to combat aircraft, bombing and reconnaissance. Then the team of designers joining Eng. Djordje Ducić and a few young engineers who work on the design and manufacture of prototype completed by the beginning of a large aerospace workers strike that took place in April 1940. Final assembly took place at the military part of the airport in Zemun.

The first flight was on 24 April 1940, a test pilot was a reserve lieutenant Đura E. Đaković transport pilot Aeroput. The first flights justified all expectations in terms of aerodynamic characteristics and performance. Unfortunately on the third flight the pilot was unable to lower the landing gear and belly-landed, thereby damaging the propeller and engine. Propeller and landing gear were created by German and French production so that supply parts for the war in Europe went very slowly. The aircraft was rebuilt so that testing could be resumed at the end of March 1941. In early April, the bombing of the airport in Zemun a plane Zmaj R-1 was damaged in late June, the Germans were cut and thrown into the scrap metal.

This twin-engine middlewing aircraft had two engine Hispano Suiza 14AB of the 750 PS (552 kW; 740 hp) mixed construction and well-armed, two 20mm cannon Oerlikon, and four machine guns 7.9 mm -caliber. The reconnaissance variant instead of guns had more tanks and three crew members. As bombardier could inside the fuselage to carry 1600 kg bombs.

Operational history

By using this operating aircraft did not happen, they know only plans, namely on the basis of the plan of arming Yugoslav Royal Air Force (YRAF) was provided to all aircraft for reconnaissance purchasing from domestic producers that role was supposed to belong to Zmaj R-1.[6] Designed such that the plane was shown useful experience from World War II, where all the warring parties had such a plane (Messerschmitt Bf 110, de Havilland Mosquito, Potez 63, Tu-2 and the like) that belong to this class of aircraft.

Operators

 Kingdom of Yugoslavia


Specifications

General characteristics

  • Crew: 3-4
  • Length: 12.78 m (41 ft 11 in)
  • Wingspan: 14.40 m (47 ft 3 in)
  • Height: 2.50 m (8 ft 2 in)
  • Wing area: 33.80 m2 (363.8 sq ft)
  • Empty weight: 2,600 kg (5,732 lb)
  • Gross weight: 5,094 kg (11,230 lb)
  • Max takeoff weight: 5,664 kg (12,487 lb)
  • Powerplant: 2 × Hispano-Suiza 14AB 14-cylinder radial engine, 552 kW (740 hp) each
  • Propellers: 3-bladed

Performance

  • Maximum speed: 450 km/h (280 mph; 243 kn)
  • Cruising speed: 320 km/h (199 mph; 173 kn)
  • Range: 1,000 km (621 mi; 540 nmi)
  • Service ceiling: 10,000 m (32,808 ft)
  • Rate of climb: 5.55 m/s (1,093 ft/min)

See also


Notes

  1. ↑ Fabrika Aeroplana i hidroaviona Zmaj
  2. ↑ Петровић, O. (2004). Војни аероплани Краљевине СХС/Југославије (Део II: 1930–1940.). Београд: МВЈ Лет (Flight) No. 3.
  3. ↑ http://www.letletlet-warplanes.com/2008/06/02/zmaj-r-1/
  4. ↑ http://translate.google.co.uk/translate?hl=en&sl=pl&u=http://www.samoloty.ow.pl/str176.htm&ei=gSEvTNXCMoqy0gSts8mnAw&sa=X&oi=translate&ct=result&resnum=10&ved=0CFIQ7gEwCQ&prev=/search%3Fq%3DZmaj%2BR-1%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26hs%3Dx3g%26rls%3Dorg.mozilla:en-GB:official
  5. ↑ http://www.aeroflight.co.uk/waf/yugo/jkrv/types/zmaj_r1.htm
  6. ↑ О. Петровић., Војни аероплани Краљевине СХС/Југославије (Део II: 1931–1941.), Лет (Flight) 3/2004. Београд, 2004.

References

  1. Janić, Čedomir; O. Petrović (2011). Short History of Aviation in Serbia. Beograd: Aerokomunikacije. ISBN 978-86-913973-2-6. 
  2. Војна енциклопедија, Београд, 1975., страна 348.
  3. О. Петровић., Војни аероплани Краљевине СХС/Југославије (Део II: 1931–1941.), Лет (Flight)No.3/2004. Београд, 2004.
  4. Јанић, Чедомир; Петровић, Огњан; (2010). Век авијације у Србији 1910-2010, 225 значајних летелица (in (Serbian)). Београд: Аерокомуникације. ISBN 978-86-913973-0-2. 

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