Seaplane Dornier Do 24ATT

https://youtu.be/rpj8smdu3kU

:Grumman JRF-5 Goose with hydrofoils

Curtiss Tyriad A-1

Loening OL-8A

Catalina Bird Innovator

The most obvious and controversial modification is the pair of GSO-480 Lycomings outboard of the R-1830-94 P&Ws. The obvious question is, how can an extra 760 horses help an airplane that already has 2,700? Doc Bird has the answer to that. According to him, the outboard section of the Catalina wing never did do the job, especially at slow speeds. It's so big and rough that the airflow tends to break up prematurely.
The contribution of the Lycomings is not to add horsepower, but to act as exotic flow straighteners and aerodynamic boosters for those huge outer wing panels. The slipstream from the Lycomings makes that portion of the wing much more effective and dramatically drops the Vmc with one of the main engines out. They increase cruise speed 20 mph, to a not-too-impressive 150 mph, and drop stall speed at least 5 mph.

Beriev Be 103

Dornier Seastar

Dornier Do-24ATT

In February 2004, a Do.24 was restored, fitted with retractable landing gear for amphibious use and re-engined with turboprop engines to become the Do.24 ATT, which began flying around the world on a UNICEF mission to assist children in the Philippines. The Do.24 ATT is piloted by Iren Dornier, the grandson of Dornier founder Claudius Dornier. Upon completion of the work with UNICEF, it will be run as a special charter airliner by South East Asian Airlines.