Swede 55 is pleasing to look at and exciting to sail. Classy, elegant and still one of the fastest boats around. Here are some thoughts on how to build this boat again – better.

Knud Reimers had planned Swede 55 with a displacement of 7.75 t and 3.4 t ballast, a ballast ratio of 44 %. When he saw the prototype floating at Fisksätra Varv in Västervik he noted it sitting deeper in the water than anticipated. Swede 55 actually displaces 8.2 t net and 8.5 t half load. She is sailing with a ballast ratio of 40 %. As a narrow boat like Swede 55 relies on its ballast ratio to perform very well, the new build should get a ballast ratio of 54 %, similar to a metre boat. Further the new build should meet the planned displacement. Adding weight to the keel while getting the new build generally lighter is a challenge.

Swede 55 in state of the art construction

Together with a well reputed composite boat builder the new build of Swede 55 in a contemporary construction method was evaluated. Depending on the clients budget, four construction and weightsaving levels are suggested – from medium tech (left hand column) to grand prix technology, with reduced pre impregnated resin content, further cured in an autoclave (right hand column) to make best use of the chemical process: heating of the resin to fully cure it and use the adhesive properties of the chemical process.

Swede 55 in advanced materials

Swede 55 LOA 16 m, LWL 12,70 m, Beam 2,93

Hier soll die Tabelle rein. Fünf senkrechte Spalten, 11 waagerechte

Remarks: The calculation contains a conservative mast and rigging weight assumption, equivalent to the heavy and forgiving Seldèn spar (tube weight of the deck stepped 16,45 m aluminum spar 107 kgs plus spreaders, running and standing rigging). The new build would get a carbon spar with 50 percent tube weight of an aluminum spar. Composite rigging instead of stainless steel cables will reduce the rigging weight even more. Further the design spiral and weight savings in other areas of the boat (down to a lighter engine etcetera) is not jet contained in these preliminary numbers.

Conclusion: Built in the lowest tech level Swede 55 would become lighter than the Fisksätra manufacture, with a ballast ratio of 54 instead of 40 %. The two higher grade Carbon/Kevlar new builds (right hand columns) require a redesign due to a weightsaving of 1,4 or even two tons. Such a state of the art Swede 55 displacing three quarters of the original will result in a new Sailarea/Displacement ratio – a sensation to sail.

A second measure to gain stability will be to make the boat slightly wider. The gained righting moment is to be evaluated in collaboration with a naval architect.  Such a refinement is a delicate task. By all means the elegance of Swede 55 with its slim rear overhang should be preserved. Rendering the new lines will help.

58 footer in advanced materials

The dream boat of every experienced sailor is the same boat he already has, just a little bigger. Here is the concept of a 58 ft Swede. 17,60 m LOA, 14 m Waterline, 3,23 m Beam, ballast ratio 54 %.

Charming, elegant appearance

Hier soll die Tabelle rein. Fünf senkrechte Spalten, 11 waagerechte