I translated this to " Ez első magyar repülőgép" and it told me that I was missing "az" after Ez. Is this because it says "This is THE first..."? I'm just wondering if " Ez az első magyar repülőgép" could mean "This first Hungarian airplane."
The first Hungarian plane was probably the Vuia-1, built by aviation pioneer Traian Vuia (Romanian born in Austria-Hungary, in the Banat region). The airport of Timişoara (Temesvár in Hungarian) is named after him.