42' and 50' Cruising Sailboat Designs 50 ft Ketch Rig

Ketch without flying stern seat and set with standard sails

Ketch without flying stern seat and set with light wind sails

Ketch with flying stern seat and set with standard sails

Ketch with flying stern seat and set with light wind sails

L O A: - - - - - - - - - - - 50.49 ft station spacing: - - - - - - 3.75 ft freeboard: - - - - - - - - - 5 ft designed waterline length: 37.50 ft draft: - - - - - - - - - - - - 5.50 ft

Beam: - - - - - - - - 14.85 ft beam @ dwl: - - - - 12.31 ft displ (light): 469 ft3 / 30k lbs wetted surface: - - - 478 ft2 hull speed: - - - - 7.8 knots

A table of the sail areas and aspect ratios is shown below:

Standard jib area: - - - 600 sq ft (aspect ratio: - - 4.5/1) Standard main sail: - - 524 sq ft (aspect ratio: - - 5.5/1) Standard mizzen sail: - -290 sq ft (aspect ratio: - -5.8/1)

Light wind drifter: - - - 1050 sq ft Mizzen stay sail: - - - - 700 sq ft

The light-wind sails are sheeted to special blocks near the end of the main and mizzen booms and the sails can be hauled over just like a regular jib. The sails can thus be handled using either or both boom sheets and jib sheets. The forward drifter sail, when running before the wind, can be used in conjunction with the standard jib as there are two head stays 3" apart and two blocks at the top of the mast.

For pictures of the, 1/8 scale of the 42 ft, model hull @ approximately 2 knots speed click below on "one eighth scale, remote-controlled, sloop.htm". As can be seen the hull moves almost effortlessly through the water at 2 knots (equivalent to 5.6 knots of the full-scale hull). Performance of a 1/8 scale model of the 50.5 ft hull, would be even better and smoother than the proportionately beamier 42 ft hull.

The yacht can be loaded with gear and supplies to the weight of 10,000 lbs beyond the light displacement of 30000 lbs.