This post is an update on the Aluminum trimaran being developed by sailor Valery Gaulin. As you can see if you read his first post about the Aluminum trimaran he is building, Val has made quite a bit of progress on his very unique small tri / sailing canoe.
Valery shares that he hasn’t tested his creation in the water … yet. But that’s coming.
Please note: anything inside brackets is where I added some words for clarification. Val permitted me to do a little editing, as English is his second language.
Many thanks for continuing to share about this project with us at SmallTrimarans.com Val!
— Small Tri Guy
Here are some more pictures of my [trimaran building] project (below). The inspiration of my design are [the] Hawaiian sailing canoe, Philippine Paraw, [and] trimaran [design model in particular].
I want a boat that is fast and can be single handed. It also needs to be trailerable, so the aka can fold from 20 feet to 8 feet wide for trailering purposes. I also wanted a light and strong boat. Therefore, I ended up with this design. Hopefully, it will be a good boat!
Why did I choose aluminum as the building material? Aluminum is very strong relative to its weight. It does not deteriorate over time and can endure some rought treatment.
I considered using ply-epoxy, but after some carefule research, I realized that epoxy has a lot of volatile byproduct while working with it and this can very harmful for someone’s health. Also, I really like the fact that an aluminum boat can be completely recyclable. From all these reasons, I choose aluminum.
Instead of welding, I choose to rivet the entire boat … in a similar way as an aircraft is built. I choose to rivet the boat because I used a very thin aluminum gage for the hull (0.06”).
It’s very difficult to get a good finish with no heat distortion while Welding this thin of a gage. Also, a weld create a weakness in aluminum an can be prone to stress failure at the weld.
Can’t wait to put the boat in the water.
Update -11-21-13: Valery got back to me recently and let me know how things actually worked out with regards to the design of this boat (as it’s been presented in the 2 posts featuring it).
He got the boat finished and into the water on 2 occasions. Both times were sea trials.
During the first sea trial, the boat was run with just a motor on it … and the 2nd time this craft was put under sail. Val discovered the following things:
— The hulls didn’t have enough rocker and the lack of either a deep centerboard or leeboard additionally hampered its performance under sail
— The COE and CLR were never quite right
— The boat would get stuck in irons when trying to tack
— The boat was too wide for most boat ramps in the area (20 ft)