There is a project of about our invention. We form a group 4 students. Raihan,Surya and Ivan was in my group. Our invention is Rotor Blade Cap(RBC). We just click a button and if we want to land it will automatically land. And there is a disadvantage also. It needs more time to practice our balance, and it’s quite expensive. It was full of fun and it’s very exiting but we have to discuss many times.