How to choose your car?
|3 February 2012||Posted by Alex from Lagoon under Technical world|
If it can be said that your catamaran has become your house during a blue water cruise, we can also consider that the tender has become your car. In fact it will have the same use as a car for short trips and carrying various things like food, equipment etc. Patricia proud owner of a brand new Lagoon 380, sent me an email looking for advice in choosing her car sorry: her tender!
First of all, you need to determine the size and the weight of the beast. The best way is to collect from the shipyard their recommended data. In fact you need to know the length between the two hulls and also the max load capacity of the davits. When you talk about size you need to take in count the diameter of the tubes and the length of the outboard engine shaft. The larger the tender, the better its behavior on the water and its carrying capacity. Nevertheless, putting a big tender on the after part off your catamaran means more weight aft and it is not good for the boat’s balance. You need to find a compromise.
See below the recommended size and max weight (tender + engine) of the tender for each Lagoon model:
Lagoon 380: 3, 10 m – 150 kg Lagoon 400: 3, 40 m – 150 kg
Lagoon 421: 3, 40 m – 200 kg Lagoon 450: 3, 50 m – 250 kg
Lagoon 500: 4, 00 m – 250 kg Lagoon 560: 4, 30 m – 350 kg
Lagoon 620 : 4,70 m – 350 kg
There are different building materials: if you talk about tubes, you mainly have PVC and Hypalon. The latter has a better resistance to abrasion and t0 UV but it is more expensive. As for hulls, there are two different types: composite or aluminum (excluding the slatted bottom tenders which are more fragile and not so seaworthy). The advantage of aluminum is offers a better resistance to abrasion (of the sand for example), to impacts and can be lighter compare than composite hulls. But guess what ? it’s more expensive !
As for the engine, no surprise, follow the builder’s indicative max power to avoid breaking the transom of the tender. After that, the choice of the power will be made according to the average load (stuff and persons) and to the « fun use » that you have programmed or not (wake board…). I’ve decided to exclude inboard engines or jet propulsion because they are more complex for the maintenance than an outboard engine.
Console or no console? It takes space and so can limit the available space to carry stuff. Nevertheless it can be useful in terms of comfort for long trips.
Tender lift or no tender lift ? This is a great structure for big catamarans which enable to place your tender on it and can be used as a swim platform when the tender is away. But it increases the weight on the after part of the boat and is not protected from salt water. So you need to control and to service it regulary, specially the hydraulic unit.
Lagoon has developed tender packs for each Lagoon model in partnership with Highfield, a brand specialized in aluminum RIBs, which are really appreciated by the Australian maritime police. See the link of the tender for each model:
Advice: your catamaran has davits which are really easy to use. So make sure to use them at night at anchor, so as to:
– Avoid thefts,
– Avoid to have a dirty hull,
– Be able to act quickly if you need to move the boat during the night without the issue to have a rope caught in a propeller.
To sum up, the tender is a crucial element of your catamaran. In fact, during an Atlantic tour of one year, you will be sailing 30 % of the time and be spending the rest of it at anchor or in a harbour. So make sure to make the good choice for your tender in relation with its usage: it will be your car for almost 70% of your time!