At 1945,when World War II is already at the end,Indonesia heard of the usage of jet engines at Europe theater,to be exact the Me 262 Schwalbe,the plane is agile and deadly,but Indonesia do have a jet engine capable of pushing an aircraft to fly,and after the war ended,the plane was build and it was designated as F-337,it was the first operational Asian jet powered aircraft,but the plane do lack of stability,at maiden flight,the pilot push the throttle to 100% quickly and just push the nose immediately,the plane do fly but in a rather unique flaw,the plane flaw do give it an advantage,of a quick and short take off,the plane have 4 20mm C-1 cannons and late version have a new weapon and avionics,enjoy lads!