Saturday, July 16, 2011

Design 282 - Seawanhaka 21ft Class

After almost 20 years of competition in S-boats, the members of Seawanhaka Yacht Club decided they were outdated and that a new club boat was needed. The new class should incorporate a parachute spinnaker, genoa jib, longer overhangs and no running back stays, something like a baby 6-meter with modest cruising accommodations. The year was 1938.

In the spring of 1939, the new 21s began to arrive. Built to a high standard by Henry B. Nevins of City Island the boats were pretty and modern, even sporting rod rigging. The class was active for 28 years when the boats were replaced by the new fiberglass Shields Class.

I think the design is beautiful, and somewhat similar to a Dark Harbor 20. I like the way the cabin sides extend forward around the mast and create a recess for halyard tails. Also the rigging and deck gear/deck layout is more advanced than a Dark Harbor. Remember this boat was designed 6 years after the Dark Harbor.

For anyone interested, plans sets are available for construction for $3,875 including 18 sheets of plans.

Here are the plans.

Principal Dimensions
LOA 31'-0"
LWL 21'-0"
Beam 6'-7"
Draft 4'-6"
Sail Area 357 sq ft


  1. The top of the rudder stock is only 4" above the static WL and below the sailing WL - how did that work?

  2. I have to agree with you that this looks problematic. Looking back over the designs leading up to the Seawanhaka 21, most 6-meters placed the tiller on the deck. Due to the mainsheet arrangement of #282, the tiller was placed below deck. I see they did this on the 6-meter Lulu as well. I will post her construction plan later today. I can only assume the stuffing box was critical...

  3. The rudder post stuffing box on the Shields is below the waterlines and work just fine.