Piasecki H-21C Shawnee (83+17) in a fake livery but used by the German Army (Deutsches Heer) at the Technik Museum Sinsheim (Germany)

The Piasecki H-21 Workhorse/Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol). Commonly called "the flying banana", it was a multi-mission helicopter, utilizing wheels, skis, or floats. The H-21 was originally developed by Piasecki as an Arctic rescue helicopter. The H-21 had winterization features permitting operation at temperatures as low as −54 °C (−65 °F), and could be routinely maintained in severe cold weather environments. The H-21C Shawnee (Model 43) is a US Army version of the H-21B, became CH-21C in 1962, 334 built for United States forces. 32 built under license by Weser Flugzeugbau for the West German Army.

The Technik Museum Sinsheim (Sinsheim Museum of Technology) is a technology museum with a strong emphasis on motorized means of transport. It has been located in the town of Sinsheim (south-east of Heidelberg) in the German state of Baden-Württemberg since its opening in 1981. The two supersonic airliners Concorde and Tupolev Tu-144, which are standing together, are the most striking attraction, but the museum has several collections. The collection includes: aircraft, classic vintage cars, racing- and classic motorcycles, racy sports cars, Formula One legends, extensive militaria, mechanical, rarities and fashions. The museum was founded by car enthusiasts, with the entrepreneur Eberhard Layher as initiator. In addition, the museum also features an IMAX 3D cinema with state-of-the-art 4K technology and a 22x27 metre (about 72x88 ft) projection screen. The museum is connected to the Technik Museum Speyer (Speyer Museum of Technology) in the city of Speyer, which is 34 kilometres (21 mi) to the west.