Everything you need to know about trampolines

The famous net that sits between the bows of our multihulls is certainly one of our favorite places on board. How is it made? What’s its life expectancy? How do we change it? The company Feelnets has helped throw a little light on the subject.

Almost all existing multihulls are equipped with trampolines. Either one or two, for catamarans depending on whether you’ve got a central beam, and two to six for trimarans. As far as the latest models are concerned, the rise of powercats and of the Bali range - which adopts a rigid deck right up to the bows - is changing things somewhat. But this doesn’t call into question the omnipresence of trampolines.

The average area of a trampoline

For a 40-foot catamaran, the trampoline area is 8 to 12 m² (85 to 130 sq ft). For a 45-footer, it’s more like 12 to 18 m² (130 to 190 sq ft), while a 50-footer, on the other hand, exploits 12 to 25 m² (130 to 270 sq ft). The difference in surface area is directly related to the footprint of the nacelle: the fastest - and lightest - multihulls generally have a maximum trampoline area. Conversely, trampolines on the most ‘comfortable’ multihulls have a smaller surface area.

On the various materials...

Polyester

This is the material most commonly employed by the major manufacturers, but also as a replacement. The trampolines offered by Feelnets are available in 30 x 30 mm or 13 x 13 mm mesh (13/16” or ½”). The former is pleasant for relaxing on; it also offers a good passage for a wave to pass through, in case of heavy weather. This is what you’ll see with most charter companies around the world. The tighter mesh offers a little more comfort. 

Technical specifications:

 4 mm (3/16”) diameter cord for the 30 x 30 mm mesh;

2.5 mm (⅛”) diameter for the 13 x 13 mm mesh.

Strength: 200 kg/m² (4,750 lb/sq ft).

Material weight in 30 x 30 mm = 450 g/m² (13oz / sq yd).

Material weight in 13 x 13mm = 700 g/m² (21oz / sq yd).

Polyester is available in black or white and is protected by a high-strength UV treatment. The border is a 10 mm (⅜”) white whipped rope. 

 

PVC Mesh

Extremely resistant, PVC is ideal for the marine environment. The edges are welded and sewn: the trampoline does not slacken. One element to take into account: the higher weight compared to polyester. It is possible to order grommets all around every 150 mm (6”). As an option, a sleeve can be made to take eyelets - recommended for larger trampolines.

Technical specifications:

(PVC Mesh Serge Ferrari 492 and 392)

Mesh size of the 492: 7 x 6.5 mm (9/32” x 1/4"), available in white.

Mesh size of the 392: 3 x 3 mm (⅛”x⅛”), available in black or white.

Resistance: 450 kg/m² (10,685 lb/sq ft).

Material weight: 1000 g/m² (29.5oz / sq yd) for the 492 and 820 g/m² (24.2oz / sq yd) for the 392

Dyneema

Extremely resistant, PVC is ideal for the marine environment. The edges are welded and sewn: the trampoline does not slacken. One element to take into account: the higher weight compared to polyester. It is possible to order grommets all around every 150 mm (6”). As an option, a sleeve can be made to take eyelets - recommended for larger trampolines.

Technical specifications:

(PVC Mesh Serge Ferrari 492 and 392)

Mesh ...

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