we believe it is a cousin of the Westerly.  We had a rudder made, and then Robert made another rudder and personally attached it!  It sailed from Yankee Point Marina the first weekend in April 2006 and had a wonderful time going down the Corrotoman River without a problem.  Robert is designing an electric engine that will continue with the environmentally wonderful treat of boating without fossil fuels.  A great new life for a happy little boat!

Here's a history of twin keels we found:

"No other nation has put so much faith in bilge (or twin) keels as the British. Other countries have flirted with them, but we became so enamored with the concept that they were the first choice for anything less than about 36 feet."

Practical Boat Owner
Buying A Second Hand Boat, April 2005, pg 54
 

Blue Bird, the first twin keel yacht, was built in 1920 by Lord Riverdale. She was 25 foot and had twin rudders.  Sea Witch has one rudder, now a very big one!

These boats can stand upright on two legs when low tide makes that necessary.  A boat like this vessel has circumnavigated the globe. They are superb all rounders, brave little boats that are a joy to sail and implies that, in experienced hands, they are a match for today's crop of small performance cruisers (probably referring to the MacGregor 26 cruisers). pg 100 April 2005.

Laurent-Giles proposed twin keels for Trekka and while this keel form was rejected by Guzwell in favor of a bolt on centerline keel, Laurent-Giles was successful in getting the concept built on the twin keel Westerly Centaur 22s, about 15 years later. The Westerly Centaur 22s today are viewed as a breakthrough in modern boat building. They use asymmetric keels of 2 foot 2 inch size which were abandoned to gain windward performance such as is found on the Sadler 26. Note that windward performance of a twin keeler in rough water is superior to a deep single fin vessel because of the roll and pitch dampening abilities of the keels.

In light wind (less than 7 MPH) there is really no capsize risk. Hence they are endorsed by the manufacturer for unballasted operation under power and sail. Unlike other trailerable sailboats, the hard side chines  form twin shallow keels so that the boat tracks well under sail unballasted. Twin keels become more effective with increased angle of heel, while a single keel becomes less effective.

Twin keels assist in planing because they reshape the wave pattern to produce a flatter wake and can reduce the effort needed to break out from hull speed.   Because the prop can work in clear water without turbulence from a centerline keel and/or rudder, handling is more efficient, less fuel is consumed, the boat is faster and can be operated better when the engine is in reverse. There is little problem in racing unballasted when winds are light. Multihulls race under special rules but are not required to be ballasted and combined weighted-keel-water-ballasted vessels such as the Hunter HC50 and Guzwell's Endangered Species fill tanks only in heavy wind. In any case, the term swing keel is being reserved for a centerboard that has weight attached to the foil.

Also, this one is a 1976 runabout SportsCraft
Needs trailer, motor, seats and anything else!