Came across this elegant design yesterday. 25' x 4' driven by electric or very small outboard motor.

Thought what a lovely Thames launch she would make.
Plans are available with full size templates for bulkheads and planks.

Studies with a model showed she could achieve hull speed with just 2hp.
http://www.islandboatshop.com/Island_Boatshop/NEW_DESIGN__Lake_Union_Launch.htmlBrian