martes, 21 de septiembre de 2010
Everything starts with a plan.
In this blog, I will be building a small pram, which is to be used as a tender on my small sailyacht, "Yggdrasil" , a swedish built Albin Vega 27.
The pram is a home design made to the size which I find will be acceptable to store on the foredeck of my boat. The size will be 220 x 113cm ( 7´3" x 3´8")
In designing the pram, I´ve tried to make a round bilge pram with max initial stabilty. Thats what you need in order to tow well and at the same time be reasonably ok to enter from the mother ship.
The design is a flat bottom with 4 strakes a side, which I find is enough in order to make a good shape and look good at the same time.
She´s going to be built ultra light in outdoor (WBP) quality plywood using the clinker ply method. I was lucky to find some 5mm 5 layer plywood which is very light and well made. It doesnt chip and seems to be well glued. I´m going to use it for the bottom planks. For the side planks I´m going to be using 4mm 3 layer plywood. I´m not going to epoxy the hull and I´m not applying glassfiber. This in order to keep weight down. My hope is that the pram will be relatively easy to lift on board the mother ship by one person and that it´ll carry me and doggy and sometimes an extra person. My goal is a max weight of 19kg (40 pounds)
The pram is going to be painted because 1 layer of paint is the same amount of work as 4 - 5 layers of varnish. I might be varnishing the transoms and the seats. We´ll see.
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