`  == Only Coanda-1910 ``unsuccessful`` in the entire Timeline of aircraft engine development. Quite strange! ==  I have noticed that the entire timeline of aircraft development, ranging from 1848 to 2004, has a single engine labeled as ``unsuccessful``. All other motors are considered successful also many o them are in the same situation as Coanda-1910. More, some engines never left the drawing board being years later developed by other inventors in efficient motors, with major modifications.  I will delete the epithet ``unsuccessful`` because I consider it was not placed in good faith. Coanda-1910 power plant itself was built, worked and it was an original design.`