Home study courses, Yacht Design and Yacht Design Lite, have produced many professional yacht designers as well as interested amateurs. Non-profit affiliate of the American Boat & Yacht Council.
Discussion of how safe and seaworthy small trailerable sailboats are and whether these qualities can be enhanced with some practicable key modifications.
An interesting 18-page discussion of the design choices this builder has made in displacement, fiberglass laminates and resins, and certain details of their boats.
Plug in your boat's dimensions and these pages will calculate maximum hull speed, capsize resistance, angle of vanishing stability, sail area to displacement ratio, displacement to length ratio, and motion comfort ratio.
A discussion board and photo gallery for cruising sailors and wannabes, focused on specific boat designs.