EDO Aircraft Corporation Supplies C47 On Floats
The EDO corporation was developed amphibious floats for the C-47 cargo plane in the 1940s. These floats were gigantic. Reportedly, 32 sets of floats were developed for the C47. However, only two sets of floats appears to have been installed on C47.
Below is a video of from the the 1940s that provides visual confirmation that the concept of a C47 on floats was feasible.
In more modern times, a DC-3 was fitted with the EDO floats. The video below provides some additional information on the DC3 on EDO floats.
Learn more about the EDO aircraft corporation.