Vitamin Sea - J-24 Tri Conversion Videos

[aussiebushman]

Hi Sammy

There are several sites covering various Scarab builds, but the most useful in terms of detail is http://www.voile.org/trimaran/

http://www.teamscarab.com.au/constru...carab-670.html is also worth reading

Cheers

Alan

[aussiebushman]

Sammy

Just for interest, here is my adaptation of the beam root system. Inside the hull are aluminium frames that extend outside the hull about 150mm. The roots are made from solid Paulownia timber, with aluminium cheek pieces where the struts will be mounted. Each root is secured with 316 stainless bolts to the frames, then bonded and faired with epoxy/microfibres.

The next stage is to wrap each assembly in 440 gsm cloth and epoxy and fair again. The beams themselves have a a bottom member that is the original A Class beam and a top member made of 100 X 50 aluminium hollow box section. The struts joining the root to the beam to allow it to swing and fold down against the main hull (two top and two bottom on each beam) will be made of 316 S/S. Each ama is asymetrical and the picture shows where the upper and lower beam sections join these at the ama-end (also bolted and glass-wrapped).

If interested I'll send more pictures of the beams later, but first the outside of the main hull has to be glassed, faired etc, The interior has been done and the fitout completed. The ply "windows" are there to minimise the dust ingress and will be replaced with Plexiglass in the final build stage.

Hope this is of interest

Alan

[bruceb]

Sammy, It is too bad you are so far away, but I am sure you will find a hull there. I actually think the H-26 is somewhat large for that kind of a project. It does have a lot of space for a 26, but that means it is also big and tall on the outside. I think one reason the J worked as well as it did is that the hull is low-profile and doesn't present that much drag. I think a "sport boat" hull would make a better conversion, but some people told the J owner that it wouldn't work either so don't let "advice" keep you from building B

[bruceb]

Alan, keep the pictures coming if you can. I am quite interested in the folding details and also the beam attachments. It looks as if you have a good plan. B

[aussiebushman]

To avoid repetition, please see post 223 in the 22 - 24 trimaran thread. It has pictures of the folding beam pattern

Cheers

Alan

[DennisRB]

Nice work Delane. Looks like you are having fun on your new tri.

Alan. Please make a dedicated thread for your Awesome Tri.