What is Trampolines (Mulithulls)?
Trampolines are large net or webbing structures that stretch between hulls on multihull boats. They can be located anywhere on the boat, but are most common towards the bow of the boat.
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What it is
Trampolines are large net or webbing structures that stretch between hulls on multihull boats. They can be located anywhere on the boat, but are most common towards the bow of the boat.
What it does
Trampolines allow wind and waves to pass through the open structure reducing bow weight, the force transferred to the hull and pitching in wavy conditions. High performance boats may be designed for a stiffer/tighter trampoline, providing a more stable structure for crew to cross, while pleasure-cruisers may have a trampoline with more give for lounging comfort.
Why it matters
A properly sized and installed trampoline is essential for comfort, safety, and performance on boats. Trampolines extend the usable deck area of the boat, providing additional area for crew to work or relax. A trampoline with proper net openness reduces the force transferred to the hulls, reducing damage to the boat and increasing stability in extreme conditions. Properly maintained trampolines can last 5 or more years, but a variety of things can reduce the lifespan of your trampoline like UV damage, sand and overstretching.
General Maintenance
At the beginning of each sailing season, inspect your trampoline thoroughly for signs of wear. Look for fraying or snapped webbing or netting, especially near attachment points, and check for UV damage. Make sure the trampoline maintains its proper shape and isn’t overstretched or fitted improperly, as this can accelerate wear. Examine all attachment points for cracking, corrosion, rust, or other damage, and inspect the lacing for fraying or UV degradation. Ensure the lacing is properly installed and the trampoline is tensioned according to the manufacturer’s guidelines. Throughout the season, rinse any metal hardware with freshwater after saltwater exposure to minimize corrosion. Rinse the netting regularly to prevent salt and sand buildup, which can shorten its lifespan. It also helps to rinse shoes or feet before stepping onto the trampoline to avoid grinding sand into the material. At the end of the season, if your boat will be stored for an extended period, consider removing the trampoline and storing it clean and dry, out of the sun. For smaller boats, easing the tension and covering the trampoline with a UV-protective fabric or tarp is a good alternative. Every three to seven years, have a professional netmaker inspect the trampoline and replace it if necessary.
Common Issues
- Over-stretched or improperly tensioned trampolines can sag, feel unstable underfoot and become unsafe to walk on.
- Sand or dust can work into the fibers reducing lifespan
- UV damage wears through trampoline or attachment lines
- Poor installation or incorrect fit may also lead to premature wear in the lacing or netting, including snapped webbing or damaged attachment points.
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