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Construction Of Bucker BU-181 Aircraft Randsdorf, Germany 73572

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This silent German educational film shows the construction of a  Bücker Bü 181 Bestmann aircraft, one of the Luftwaffe's standard training airplanes throughout WWII.  
 
The 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 Reichsluftfahrtministerium (RLM) the Bü 181 was nominated to be the standard primary trainer for the Luftwaffe. Series production of the Bü 181 commenced in 1940. The production types were designated B to C with only slight variations between each, and could be powered by the Hirth HM 500 A or B.
 
The Bü 181 aircraft was a single-engine low-wing monoplane with fixed undercarriage, split flap, twin controls and two adjustable seats arranged side-by-side. The cabin section of the fuselage was of a tubular steel frame construction whereas the rear of the fuselage had a wooden shell. The wing assembly and tail unit were also of wooden shell construction. All the rudders, elevators and ailerons had wooden ribs and are covered in fabric. The flaps were metallic on the B types and wood on the C types. The Bü 181 Bestmann was powered by a 105 hp four-cylinder Hirth HM 500A or B piston engine. The aircraft was designed for training flights, pleasure trips and aerobatics. Its strength corresponded to Stress Group 5 with a limited load (single occupancy) and Stress Group 4 fully laden
 
The Bücker factory at Rangsdorf built most of the Bü 181's, but because of demand was forced to license the design to 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 181B and the slightly modified Bü 181C was begun by Fokker in Amsterdam in 1942 and its total wartime production was 708 aircraft.
 
The Bü 181 was also built by Zliner Flugzeugwerke AG plant at Zlin, in the Bohemia & Moravia Protectorate and after the German withdrawal the production continued after the war in the same Zlin works, now denominated as the C.6 and C.106 for the Czechoslovak Air Force and as the Zlín Z.281 and Z.381 in various versions for civil use. 783 aircraft were built. Between 1943 and 1945, Hägglund & Söner AB in Sweden built 120 Bü 181's under license with the Swedish military designation Sk 25.
 
During the 1950s the Heliopolis Aircraft Works of Egypt acquired a Czechoslovakian licence to produce the Zlín Z-381 with a 105 hp Walter-Minor engine. It was produced for the Egyptian Air Force as the Heliopolis Gomhouria (meaning "Republic") and subsequent versions were supplied to other Arab air forces. At least 300 Gomhourias were built. In all, 3,400 aircraft were built but only a handful survives today.
 
Although built primarily as a trainer for the Luftwaffe, the type also performed other duties such as courier & liaison. From March 1945 an order was issued to concentrate all the available Bü 181s to be converted either to the "tank busting" role carrying four Panzerfaust anti-tank grenades from wing-mounted launchers (C-3 subtype) or to the night harassment role carrying three 50 kg bombs (B-3 subtype). These units saw very limited use in the final days of the war due to the war situation. However, some missions were carried out, achieving moderate success but at the price of severe losses.[3] One restored Bestmann on the tank buster configuration is on display at the Deutsches Technikmuseum Berlin Test pilot, and sister-in-law of Claus von Stauffenberg, Melitta Schenk Gräfin von Stauffenberg was flying a Bücker Bü 181 when she was shot down and fatally wounded in 1945.

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