Shilshole 27

An updated Thunderbird for the 21st Century: Trailerable, high performance/cost ratio, home build-able and fun for the family to race and maybe spend 10 days cruising on. The combination of high stability, light weight and large sail area should give the Shilshole 27 excellent all-around performance on a windward-leeward race course.

The lifting keel and rudder make shallow anchorages accessible, and with the easily lowered deck stepped carbon mast, trailering is convenient. A combination pop-top/sliding hatch gives standing headroom while at anchor. The canting bowsprit promises downwind performance and folds away for trailering.

Construction is basic stitch-and-glue style, with plywood parts highly detailed and marked for easy assembly. Plans will be offered for home construction along with the NC cut plywood parts. Key components such as the foils, keel trunk and pop top are lightweight high quality composite construction and will be sold as finished parts. The goal is to keep costs for a home-built version around $50,000.

The prototype Shilshole 27 is under construction now.

Shilshole-27-General-Arrgt

Shilshole-27-Sail-Plan

  • OVERALL LENGTH. . . . . . 8.26m [27′] (W/OUT POLE)
  • WATERLINE LENGTH. . . . . . 7.92m [26′]
  • BEAM OVER ALL. . . . . . 2.44m [7.5′]
  • BEAM AT DLWL. . . . . . 1.95m [6.4′]
  • DRAFT, KEEL DOWN. . . . . . 2.09m [6.9′]
  • DRAFT, KEEL UP. . . . . . 0.7m [2.3′]
  • DISPLACEMENT, LIGHTSHIP. . . . . . 1,453kg [3,203#]
  • DISPLACEMENT TO DLWL. . . . . . 1,917kg [4,226#]
  • FIXED BALLAST. . . . . . 631kg [1,390#]
  • MAST HEIGHT ABV WATER. . . . . . 11.56m [37.9′]
  • MAINSAIL AREA. . . . . . 25m^2 [270ft^2]
  • JIB AREA (100%). . . . . . 16.9m^2 [182ft^2]
  • APROX. SPINNAKER AREA . . . . 65m^2 [700ft^2]
  • I . . . . . . . . . . . . . . . . . . . . . . . . . . 9.58m [31.42′]
  • J . . . . . . . . . . . . . . . . . . . . . . . . . . 3.23m [10.6′]
  • P . . . . . . . . . . . . . . . . . . . . . . . . . . 9.74m [32′]
  • E . . . . . . . . . . . . . . . . . . . . . . . . . . 4m [13.1′]
  • Isp . . . . . . . . . . . . . . . . . . . . . . . . 10.7m [35.1’]
  • Jsp . . . . . . . . . . . . . . . . . . . . . . . . 5.12m [16.8′]
  • DISP/LENGTH RATIO . . . . . . . . . 81
  • CP . . . . . . . . . . . . . . . . . . . . . . . . . 0.57
  • ENGINE . . . . . . . . . . .. . . . . . . . . . 5hp OB IN WELL
  • FUEL . . . . . . . . . . . . . . . . . . . . . . 23 liter [6 gal]
  • FRESH WATER . . . . . . . . . . . . . . 55 liter [14.5 gal]
  • SEWAGE . . . . . . . . . . . . . . . . . . . 25 liter [6.6 gal]