As Paulat did not succeed in obtaining the required second Hilz engine for his seaplane, he designed the light 1912 Hydro-Aero Monoplane – suited for one Hilz engine – and completed in June 1912 as a landplane. This machine crashed on June 6, 1912.
Paulat was called under arms during the Balkan War (1912-1913), but once returning, decided to end his aeronautical work due to his financial difficulties.