Weller Flugzeugbau
Weller Flugzeugbau is a German aircraft manufacturer, owned by Roman Weller and based in Biberfeld. The company was founded in 1987 and in 2012 had two employees. It specializes in the design and manufacture of ultralight aircraft, aircraft parts and aircraft repairs. The company has done contract specialized welding for automotive companies, including DaimlerChrysler, Porsche and BMW as well as work for aircraft manufacturers, including Scheibe Flugzeugbau and Sauer aircraft engines, and aviation museums, such as the Musée de l'Air, Deutsches Museum and the Technikmuseum Speyer.
Aircraft
| Model name | First flight | Number built | Type |
| Weller ULI NG | 2010 | Ultralight aircraft | |
| Weller UW-9 Sprint | Ultralight aircraft | ||
| Weller Vickers Blériot | Replica of the Blériot XI | ||
| Weller Uli V2 | 2013 | Ultralight aircraft | |
| Weller Uli V3 "Rebell" | 2013 | Ultralight aircraft |