During the winter of 1916, Dumitru Badulescu attended the Air Observer School at Barlad, which he graduated on the 12th of January 1917. Then, he was assigned to the new F6 recon squadron stationed at Racaciuni, but initially flew with the F2 as the F6 was still not ready. On the 28th of January 1917, he flew a bold mission far behind the enemy lines where he bombed the Union factory. From the 23rd of March Badulescu joined the F6 at Garbovanul airfield. There he built a device for wireless telegraphy which proved invaluable for artillery control missions. In this period he flew almost daily over the front area, bringing back valuable informations, until some bureaucrat confined him to administative duties in May. But Badulescu was not the man to be put behind a desk : he protested and eventually returned to his squadron. He got his next kill on the 27th of June 1917, when the Farman F40 crewed by lieutenant pilot Petre Ioanin and observer Dumitru Badulescu was attacked by a Hansa Brandenburg. In his report Badulescu wrote : "The fighting was going on for about 10 minutes when the enemy plane, badly damaged, fell in the Soveja area. Our crew earned the congratulations of the front commander... ". The next day he bombed the German positions in the Gaurile area and managed to photograph the enemy AA artillery batteries near the village of Campurile.