The Egyptian " Al Gomhuria" Bü 181 Bestmann Trainer Aircraft



Al Gomhuria is a licensed built version of the German Bücker Bü 181 Bestmann aircraft.

It is a single-engine low wing monoplane with fixed undercarriage, air-cooled 4-cylinder Hirth HM 500 A engine, split flap, twin controls and two adjustable seats arranged side-by-side. The cabin section of the fuselage is of a tubular steel frame construction whereas the rear of the fuselage has a wooden shell. The wing assembly and tail unit are also of wooden shell construction. All the rudders, elevators and ailerons have wooden ribs and are covered in fabric.

History:

Prototype Bü 181 (D-ERBV) made its maiden flight in February 1939 with Chief Pilot Arthur Benitz at the controls. After thorough works and official flight testing by the State Air Ministry (RLM) the Bü 181 was nominated to be the standard primary trainer for the Luftwaffe. Series production of the Bü 181 commenced in 1940/41. The types were designated A to D with only slight variations between each and could be powered either by the Hirth 500A or 504 engine. The Bücker factory at Rangsdorf built most of the Bü 181’s but because of demand was forced to license the Fokker Company in the Netherlands, who subsequently built 373 of the type for the Luftwaffe all of which were delivered by the end of 1943. Production of both the Bü 181A and the slightly modified Bü 181D was begun by Fokker in Amsterdam in 1942 and its total wartime production was 708 aircraft. Between 1943 and 1945, AB Haeggland and Soner in Sweden built 125 Bü 81’s with the Hirth 500A engine the Swedish military designation being the SK 25. Just prior to the German withdrawal from Czechoslovakia, production of the Bü 181D was initiated in the Zlin plant at Otrokovice, and production continued after the war, when the type was designated C.6 and C.106 for the Czechoslovak Air Force and Zlin Z.281 and Z.381 in various versions for civil club use. Although built as a primary trainer for the Luftwaffe, the type also performed other duties such as communication, glider towing and even transporting Panzerfaust weapons. A final tribute to the soundness of Bücker design came during the 1950’s when the Egyptian Heliopolis Aircraft Works acquired a Czechoslovak license to produce the Bestmann in versions similar to the Zlin Z.381 with 105 hp Walter-Minor engine. Produced for the Egyptian Air Force, the type name was "Gomhuria" (Republic) and subsequent versions were supplied to other Arab air forces.

 

 

General characteristics 

  • Crew: 2
  • Length: 7.85 m (25.7 ft)
  • Wingspan: 10.6 m (34.7.1ft)
  • Height: 2.05 m (6.7.ft)
  • Wing area: 13.5 m² (145.3 ft² )
  • Empty weight: 480 kg (1,058 lb)
  • Max. weight: 750 kg (1,653 lb)
  • Engine : 1× Hirth HM 504A engine.
  • Power : 78  kW (105 hp )

Performance

  • Maximum speed : 116 knots (134 mph, 215 km/h) at sea level. 
  • Cruising speed : 105 knots (121 mph, 195 km/h)
  • Practical Ceiling : 5,000 m (16,405 ft).
  • Flight range : 800 km (497 mi, 432 nm).

 



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