You do not want to understand Coanda-1910 was an experimental plane, a new concept. Coanda-1911 was built for a contest organized by the French Army. There is no evidence that the Army would have accepted a design like Coanda-1910. Secondly Coanda-1910 was able to fly short distances it could not compete against planes that flew hours. Not even the Campini-Caproni jet plane from 1940 could have competed ordinary planes from 1911.