Aluminium sail trimaran

[Astratelum]

Hello!

I'm new here. My name is Nicholas Malinovsky, and I would like to share my project with you, which I have been working on for the past two years. It is a 27-foot aluminum cruising trimaran that can be easily transported on a trailer. I designed and built it myself, and it is almost ready for testing, which I plan to conduct next week.

The floats and centerboard can be folded electronically with the push of a button.

The forward cabin is designed in such a way that, thanks to a lifting wall, it can be transformed from a sleeping area into a fully independent bathroom with a shower.

The interior features comprehensive vibration, heat, and noise insulation. There is a hot water supply system with a tank, as well as tanks for both fresh water and grey water.

The developed system allows the trimaran to be prepared for launch from the trailer in just 30 minutes.

I hope to achieve a speed of 17 knots, with an ideal target of 22 knots based on my initial calculations.

Some specifications:
• LOA: 8.2 m (without bowsprit)
• LOA (folded): 10.5 m
• Beam (unfolded): 6.95 m
• Beam (folded): 2.55 m
• Dry weight: 1400 kg
• Main sail area: 32 m²
• Jib area: 15 m²
• Cabin height: 1.7 m
• Forward cabin bed dimensions: 2.2 x 1.2 m
• Main cabin bed dimensions: 2.2 x 1.4 m
• Maximum crew capacity: 8

What do you think?

 

[comfisherman]

I have absolutely no knowledge of sailing tri marans. But thats the cleanest aluminum fab shop Ive ever seen...

 

[Ad Hoc]

Beams, appear weak. I'd like to also see how they are connected to the hulls.

 

[bajansailor]

Beams, appear weak. I'd like to also see how they are connected to the hulls.

+1 - Nicholas, could you tell us a bit more about the hinging mechanism?
If the cross beams were continuous, with the outriggers cantilevered off the main hull, this would probably be the strongest and most efficient way of building them (?) - but they have to of necessity be able to fold inwards, so then the maximum bending moment is going to be at the hinge (?)

 

[SolGato]

It’s not clear from the images, does the hull flare out above the water line or is it wide with a lot of wetted surface area?

Personally I don’t care for the swoopy bottom paint line as it throws off the proportions and is a bit confusing given all the other straight lines and angles.

The bottom paint on my Tri is too high and not perfectly straight and it drives me nuts as it makes the floats look smaller and the boat look slower.

I prefer nice clean lines that make a hull look fast when standing still with minimal bottom paint.

Not sold on the trailer to water in 30 minutes pitch as I imagine it would take that alone just to step the mast.

If only you could make that process push button (says the guy who just took his Tri out of the water and apart to put back on its trailer for winter)

Regardless, Congrats on getting to this point.

As a fabricator I know it has been a ton (just over 1.5 to be exact) of hard work, and my critique of the paint scheme is just a personal thing, and not intended to take away from that in any way.

It must be very exciting to finally get on the water and see how she goes!

Please let us know how it goes.

 

[CarlosK2]

<removed>

 

[BlueBell]

@CarlosK2

Please delete your insulting posts and stop with the insults, you distract from the Original Posters thread. Unacceptable.

Please find another forum to vent your own shortcomings.

 

[comfisherman]

Ill reiterate, my knowledge of tri hulls and sailing is minimal at best.

But Ive fabricated aluminum in and around aluminum boatyards for many years. That first photo shows a tremendous amount of work, that hull represents a ton of fabrication work as well as skill. Every angle and seam is work, even if bent, formed and router cut off site. To maintain a shop that immaculate with several hulls on the floor, is an impressive feat.

In my circle of trades, my prior comment about an immaculate shop is high praise. Especially given the complex hull shape.

Op had an idea, with a specific set of requirements, and went out and put aluminum together. While I may not understand his unique requirements locally, can still take two steps back from 6000 miles away and appreciate the effort. The fact it pees in someone's cherios to admire work from afar (very very afar) is mildly entertaining albeit irrelevant.



Hope the op follows up, interesting projects like this are what pulled me in to the boat design forum many years afo.

 

[Dimitri Pasquazzo]

Dear,
I will be interested to duplicate your work in Bahrain where aluminum is produced and local shipyard are keen to do it for less .
Could you please get in touch ?
Regards,
www.gulfkitesurfing.com +973 32233327