Payen Pa.112 C.1
The Payen Pa.112 C.1 was a French twin engined fighter that only reached the mock-up stage before being rejected by the French Air Force. The engines where placed in tandem, driving contra-rotating propellers. Only one central wheel was to be fitted, with the wings having skids attached. The proposed armament was a 7.5mm machine gun under each wing and a 20mm cannon firing through the propeller hub.
Payen Pa-112 3-view diagram from L’Aerophile October 1938 
Payen Pa-112 Mock-up 
Payen Pa-112 Mock-up
