Martin Mars Water Bomber Valkyrie Wildfire Amphibian

[fourfortyroadrunner]

In not too many years, the magnificent old aircraft like this will probably not be flyable. This, however, is not an amphibian. It is, simply, a "flying boat."  A true amphibian would be something like the Grummans (Widgon, Goose, Albatross, or the Consolidated Catalina, later models with retractable landing gear