When the 1980’s turn into the 1990’s, the old IOR rule was finally buried. It was replaced by a whole new type of measurement rule, International Measurement System, or IMS. A rule which would reflect the actual performance of the boats and then provide them with handicap accordingly. Leif Ängermark Marin developed Wasa 41 as a 12.5 meter high speed sail boat which was not only intended for sail racing customers. Leif Ängermark and Hans Leander followed their basic light-weight concept, while the maximum width
increased slightly, as well as the width of the stern ship. Long straight lines gave the boat high speed, the low weight made it easily driven and the stern was a surfboard.
Wasa 41 received a measurement according to IMS of 598. It meant that, on average, she was estimated to sail a mile of 598 seconds, meaning exactly 6 knots. She is therefore a clearly fast boat
(fastest of all IMS-measured Wasa boats), as also shown by another very practical measure, LYS, where her number is 1.35.
With a displacement of just 6 tonnes, Wasa 41 is lightweight and lively with a lot of feeling.
She has nice all-round features thanks to a sharp bow, moderate width in the waterline and a buoyant sternship that gives her long lines and good downwind properties.
KEEL & RUDDER
Wasa 41 has a modern, deep finkeel with only moderately inclined, slightly rounded front edge and a hint of bulb at the bottom. With a weight of about 2.7 tons, the keel gives good stiffness. Even the rudder has the modern elliptical shape, with a slight rounding even in the stern edge and tapered downward.
The deck line is straight, with a low and narrow superstructure. Wide walkways extend to the very stern. In addition to the large forward hatch there are three smaller hatchs for light emitting and ventilation on the roof.
The interior of Wasa 41 is based on many years of experience from family and race sailors.
This means, among other things, that the boat has good berths even when sailing. In the salon there is a pilot berth on each side, above the salon sofa. Behind the folding backrests for the sofas there is good storage for sailbags and sailclothes. Aft, under the cockpit, there are two large cabins. The one to port has a double berth, the one to starboard has a single berth plus a large storage space for sails and bags.
Wasa 41 is also available in a different interior design, more suited for comfortable family sailing. The pilot berths are replaced with cabinets and shelves and the starboard stern cabin has a double berth. In addition, the lounge sofa is replaced with a U-shaped dinette.
A large L-size galley is located to the right of the entry. With sink and water discharge near the center line of the boat, that can be used even when the boat leans when sailing.
On the opposite side, the navigator has his place, with a well-sized chart table and plenty of spaces for all electronic equipment. There is also a wardrobe for the sailing clothes. Near the main bulkhead is a spacious toilet and two large wardrobes. The forepeak is fully furnished, but in case of race saling, the berths can be folded up to protect the cushions from moisture from above. The forepeak
can then be used for sail storage.
RIG & SAIL
Wasa IMS 41 is a 7/8-type partial rig with a slender coned mast from Seldéns.
It’s very trimmable with dual straight spreaders, jumper stay, and running backstays with check stays. The mast is continuous and enters the boat immediately in front of the main bulkhead. The sail plane has the balancing surfaces of the fractional rig. It should be easy to manage, and the boat can sail only with main sail and jib already in moderation winds.
Some boats are delivered with 9/8:th rig without backstays and selftacking jib.
Hull and deck are as usual a sandwich laminate with balsa as a spacer. Unlike other Wasa models, however, Twaron fibers were used to a large extent in combination with glass fiber.
Wasa 41 is delivered with the American Certificate of Shipping (ABS) certificate, which guarantees the dimensioning, a requirement for off shore races according to category 0-2.