Hunter is known for its innovation. Examples include the famous stainless steel cockpit arch and the B&R Rig.
One of the more recent innovations from Hunter has been the use of hard chine hulls on the Hunter 33, 37 and 40. The design offers many benefits.
Hard Chine below the Waterline
The benefits of a hard chine below the waterline, is that it adds more hull form stability. The hull heels less than a round chine hull. With the chine low it also adds more width below the waterline which allows more room at the base of the furniture thus a wider boat at the floor level verses a higher chine. Being wider below the waterline allows more equipment to be positioned low in the hull resulting in weight reduced aloft which equates to a more vertical sailing hull. The low chine also adds performance with less of a tendency to round up. A perfect example of the benefits of a hard chine below the waterline is all the small racing hulls under twenty-five feet that sport this design.
The bow hollow is a concave shape at the bow waterline above and below and just aft of the bow that accomplishes two good things on a relatively wide beam boat.
Less resistance. This makes the hull go faster sooner. The top end is limited by the theoretical hull speed but less resistance will allow the boat to get to that speed faster with less power. This will result in better speed in light breezes and greater fuel economy under power.
Reduced Pitching. The concave waterline and sharp bow cuts down on the volume in the forward section. As a boat is moving through choppy water, the reduced buoyancy of the hollow shapes stop the bow from rising up with the wave, instead allowing it to cut through the wave. This will result in less pitching or “hobby horsing” thus creating a more comfortable sail.
If you examine the hull underbody in profile, you will notice a subtle “S” shape in the stern. The underbody actually begins to return to a flatter line at the stern. This does two important things:
It flattens out the stern wave, reducing drag.
It forces the stern wave to form further aft to artificially produce a longer waterline.
Both of these effects increase the boats speed potential. In light air, it allows the water to separate from the hull earlier because the curve is steeper at that point. Stern turbulence is almost nonexistent when underway. Look over the transom when sailing and you’ll notice how clean the wake is. Less disturbed water = less resistance which means more efficient sailing.