Setting up your boat trailer with the correct bunk spacing is crucial for supporting your boat's hull and preventing any potential damage. The spacing can indeed vary depending on the type of boat and the hull design you have.
For starters, one general guideline is ensuring that the bunks support the boat along its strongest points. Usually, this would mean aligning the bunks so that they run along the stringers of the hull, which are the longitudinal structural beams that provide strength. This is especially important for fiberglass boats, where improper support can lead to hull warping or damage over time.
The type of hull—whether it's a deep V, flat-bottom, or modified V—will influence your setup. Here are a few considerations:
Deep V Hulls: These often require the bunks to be tilted slightly to match the angle of the hull. Adjustable bunk brackets can help achieve the necessary angle. The idea is to evenly distribute the boat's weight across the bunks.
Flat-bottom or Modified V Hulls: These tend to sit flatter on the hull, so aligning the bunks horizontally under the stringers usually works well.
Bunk Length and Width: Make sure the bunks are long enough to support a significant portion of the boat—extending from the transom towards the bow as much as possible. Wider bunks might disperse weight better, which can be beneficial for larger or heavier boats.
Materials: Use high-quality carpeted wood or non-marring material on your bunks. Avoid materials that could scratch the hull. Some prefer rollers for easier launching and retrieval, although these might not provide the same level of support across a larger area compared to bunks.
To fine-tune your setup, it's often helpful to visit boat ramps or marinas to observe how similar boats are trailered. Additionally, consulting your boat manufacturer's recommendations is a good practice, as they often provide specific guidance tailored to their designs.
For further assistance, many online resources and forums discuss specific types of trailers and boats. The BoatUS Foundation and the American Boating Association, for example, offer helpful materials on trailering techniques and safety. You could also consider consulting with a professional at a marine service center who might offer hands-on guidance.
Ultimately, take the time to ensure the hull is snug against the bunks without undue pressure on any specific area, which prevents unnecessary stress and potential damage during transport.