During my work for Elvstrøm I sailed a lot of cruising yachts. I always went out with the new sails to check them... but I never had a planing experience in the three years I was doing it.
Creating a new touring experience Encouraged by the success of the Aeolos P30 I’ve made a concept for a light 45ft yacht with a lot of comfort (in my opinion). I don’t want to follow marketing-driven design or rating trends with this boat. Sure, the rating parameters are a bit optimised, but not at the cost of hull performance. The P45 is designed for shorthanded sailing with a crew of two, and for long distance sailing or racing with a target average wind range of 12-25 kts. But the boat can also be sailed with a crew of 6-8. The hull is CFD optimised by FluidEngineeringSolutions in Germany and for the structural engineering Solico, in the Netherlands, was chosen again. VMax is the partner for the ORC optimisation. The Aeolos P45 Luxus racing version is
the lightest compromise in terms of comfort that I can imagine. All parts are made of carbon prepreg with foam core. If you look at the key data of this boat, it quickly becomes clear that not much extra equipment can be taken along! On the other hand, most parts of the equipment become cheaper, e.g. the engine. As a thumb value one can say 2.5 kW/knot is enough to reach hull speed. The interior design of the Aeolos P45-L is rather conservative. Small improvements on a classic yacht layout that works well on the sea and in harbour. With its style and grace, the Aeolos P45-L has an interior arrangement offering abundant space and volume for a crew of six. The three-cabin layout comprises an owner’s cabin forward with a spacious heads, and two cabins to starboard and port, both aft. For racing you can add six floating bunks. My vision is to offer a yacht that is fun to sail in a regatta like the Caribbean 600, a yacht that has the potential to win when racing with friends, and one that offers the pleasure of a nice sailing holiday with the family after the race series. But if you don’t
But the most powerful design aspect here is the flat stern section even when heeling. The near to zero exit angle of the stern lines when heeled, means the perfect planing shape. And at up to 30-degrees heel the keel weight works very effectively allowing you to fly your gennaker or code zero for longer than usual.
The key to planing ability is minimal rocker. A near-zero exit angle of the stern lines is the perfect planing shape
want to compromise, then choose the pure race version. The AP45-R is the perfect fusion of technology and design. Tiller, grinder, inside almost nothing but a lot of fun during offshore racing.
Hull
Outside, the Aeolos P45 breaks with the mainstream. Her crisp, streamlined lines are designed to cut through the waves and eat the miles. The profile and proportions are unmistakably based on the Aeolos P30. Athletic with clear contours and powerful curves.
In light winds this design has low wetted area and a very slender waterline. The circular forward sections offer maximum volume with small surface area when sailing upright. This boat moves through the waves
quite smoothly when heeled – the bow section always presents the same shape between 0-30 degrees of heel.
Form follows function With the low, rounded sheerline and aerodynamic coachroof, but especially due to the hull shape in front of the mast, the Aeolos P45 presents considerably lower wind resistance than other yachts of similar size. In school I learned early: wind resistance increases
as the square of speed! The sheerline can produce huge turbulence and drag, the wider the boat, the more this tends to be. Especially when heeling, our air flow
onto the jib has less turbulence so on the Aeolos P45, the jib is much more effective due to employing more usable area. The coachroof has low wind resistance and keeps the water out of the cockpit. If you have to work on the bow in windy conditions you will love this angled deck, it offers an almost horizontal gangway when the boat heels. To save weight, we went the route of using carbon prepregs extensively, post- cured epoxy construction and Alexseal 501 finish instead of gelcoat. At the same time, we designed the structure as part of the interior and did not add an inner shell. The unique carbon keel structure – a keel box and keel made of unidirectional carbon fibre – provides improved stiffness and resistance at reduced weight. All structural
The interior design of the cruiser/racer version of the P45 is conservative, with a three- cabin layout and ample living space for a crew of six. Pipe cots can be added for racing
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