5m sport multihull new design

[josselin]

Hi All,

This is my first message here but I have been happy to read you for some time now.

Here is my project: a 5m trimaran.
It would be a sail boat for daily raid. Friends, family and good fun and speed.

Here are the main fixture of the design I have in mind :
5m long for the main hull, 4m for the floaters, 4m wide
weight? 100/120kg
Sail area : main :14m2 gib: 4m2 spinnaker :20m2
Floaters about 300% of the displacement
One rudder and one derive sabre on main hull

Construction : I need to be able to build it myself in a reasonable period of time.
For the 3 hulls, I would like to use the technique of thin plywood +carbon epoxy reinforcement such as used here : http://www.moth.it/MarcosCorner.htm
the “roof” would be used only for the main hull to help supporting the mast, the bow could be inverted to be a bit wave piercing, just for fun.
2 arms in straight carbon tube through the main hull bolded in the hulls.
Carbon mast unstayed such as http://www.juanyachtdesign.com/projects-krazykyote.html for such a small boat you just need to oversize a little bit the mast section.

I would like this boat to be light but strong, the ply wood would helpfor the shape and resistance, the carbon too.
I have no really budget for this construction that is why now I say carbon but it could be reinforcement in fibreglass, arm tubes and mast in aluminium too…

Any ideas welcome, comments too

josselin

[Munter]

Would you be wanting to fold the amas for trailering? If so, that mechanism will be very important for your design.

[Milan]

You probably already saw this:

http://homepages.paradise.net.nz/garyd/Trimaran.pdf
http://www.lunadadesign.com/

[josselin]

thanks for the links, it can help and gives ideas.

yes it could be folded or i would say dismanteled : the arms bolded on the floaters and central hull could be removed to allow transportation.

i should scan some of my designs for you to have a better idea