sentences:  A full-scale mockup, including working gun turrets, of the Fw 42's final design was constructed.Focke-Wulf promoted the design for export sales as well as Luftwaffe service, with the Russians and Japanese reported as expressing interest in the type, and one or both nations' representatives examining the mockup.However, despite the fact that wind tunnel tests of the design's unconventional configuration provided promising results, indicating that the concept was sound, no contracts for development were ever issued, and the Fw 42 project was abandoned.