Johnw, thanks for that. What a nice rule, and what fun it would be to design new boats to it.
Interesting that the requirements to sail, row and tow well lead to such a fast dinghy in strong winds.
Our local Scows were also designed as tenders to the large yachts which anchored off Lymington River, before the River was dredged. They too had to have spars which stowed in the hull. Shame our Scows did not also have the planing ability!