Tellier T.4

While the Tellier T.3 was a fine flying boat, Aviation Maritime desired a plane with a heavier payload. The Tellier T.4 was a T.3 with a strengthened hull with an enhanced profile and provisions to mount a 350hp Sunbeam engine. After the prototype was completed, a new requirement for folding wings arrived, which delayed the T.4 further. Eventually they replaced the T.3's in use in naval bases on the Atlantic and Africa.

While the original specification called for the plane to carry a useful load of, by the end of trials and tuning the T.4 was enhanced to carry a load of. Once trials had ended, it was ordered into production without any further changes. The RNAS evaluated the T.4 but decided to stick with Felixstowe flying boats.