11/15/2020. Remarks by Walter van Tilborg and Johan Visschedijk: "The two-seat PAC.1 was an original design homebuilt helicopter of A.M.G. Pauly and A. Castelijns. In 1980 the aircraft appeared on an airshow, although statically as it was not finished yet. The helicopter was built without any official supervision, so could not be registered. However, powered by an 175 hp Audi 100 car engine, the aircraft has flown a number of times, illegally of course! Its ultimate fate is unknown."