Why for example does a Taylorcraft BC-65 have a MTOW when a land plane of 1150Lbs but can go to 1228Lbs IF a seaplane?
Does this mean that the aircraft was certified to the higher weight? There is no mention of reduced speeds / G loadings etc in the seaplane config.
Looking at TCDS on the FAA web site for say a Cessna 180, an increased MTOW is also allowed when float equipped and is considerable (200Lbs or more)????