How boats are born?
|14 September 2011||Posted by Alex from Lagoon under Technical world|
Lars, one of our proud Lagoon 380 owner put a comment on the blog to say how delightful he was regarding the weight of his 380. So he gave me the idea for this new post…
As us, humans, boats are made with love! The love of the work well done, the love of a good design, and the love of owners for their boats. Of course we need other stuff at the shipyard to make boats… This post is a clear and short process that we use at Lagoon to make a cat.
You have to know that our boats are mainly built in 3 parts: the hulls with the bridgedeck, the deck and the roof with or without a flybridge, depending on the model.
The story starts with fibreglass, resin and balsa (I will take the example of the transom for a Lagoon catamaran to illustrate all the stages, but the process is the same for the whole boat).
1. As for a cake, we butter the mould (in fact we wax it) for an easy removing phase.
2. We put inside a layer of gel coat which is the material that gives this white and shiny aspect to the hulls.
3. We hand lay the primary contact outer skin. The aim of this first layer is to”catch” the next ones.
4. We place several layers of fibreglass and balsa. The different pieces of balsa and fibreglass are defined on a plan like a puzzle with a specific order: the fibreglass part 1 goes to t place 1 in the mould…
5. After this preparation we implement the infusion materials. For those who do not know this process, you will see that it is very simple: we fit different tubes with holes that we can call “resin feeder lines” on the mould. The start of the tube track is linked to a resin tank. At the end the track is connected to a pump, then we create a vacuum on the whole part with an air pump and a plastic film.
6. Then you have just to put the resin inside the resin tank and shut on the pump to begin the infusion. The vacuum pressure drives resin into dry fibreglass and balsa. It is very quick and you need around 3 hours to mould the deck of a Lagoon 500.
7. When the infused part is dry we remove it from the mould and the part goes go to the trimming phase where we cut off all the fibreglass excess.
At the end of that stage, you have your hull, your deck and your roof but the road remains long until the finished boat leaves the factory…