Three Springers at the SSMBC meet.
Examining on the size of the boat and human figures I derenmined that the best combination would be in the 1/16 to 1/18 range. They can be a smaller boat, say 20 feet at 1/12 scale, but the cabin would need to be taller. Also, I noted that the odd shape of the hulls seem to be for those in the mid 20 feet length range.
The actual original Springers (models) have a one design specification for the size, hull shape, propeller, motor, and battery. This is so they can be used in competition (racing, games). This is why my models based on real boats that have two motors/props and I have only one motor/prop.
Lew
Florida, USA
Home page: https://www.RCFlorida.org/lmb