A trimaran daysailer foraging boomers

A

Amati

Guest
Amati, that's a pretty interesting idea.  There's a slightly busted up L7 for sale cheap right now.  Somebody with a little skill could make a nice cat outta it or just fix it and have a great tri.  I've sailed a few times on a Woods cat that uses the same mast and sails as the L7.  The hulls are much heavier than the L7 amas but the boat sails very well.  I think a 12ish foot beam would be fine for your proposed cat. 
How to tie/bolt/ the beams together, or have them slide in boxes.  Frankly, bolting the beams together is tempting, just to I don’t hear them clunking around.  I also wonder about the floatation of the outside hulls once the middle hull is gone.  Have you ever had your L7 up on one hull?  If so, how much did it depress?  I’d call up Mike and ask, but this is more a gedankenexperiment at this point.  On the other hand, he was the one who mentioned it….. <_<

 
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skirret

New member
Not a boomer but did allot of research and instead of just another Getaway on the bay I finalized down to 2 boats here in Hawaii that dont exist, Diam 24 and any of the Astus's.  Which in the case of single handling in good wind and the fact it can be broken down reasonably and budget it was the 16.5 that was chosen.  But man did the pandemic make me pay!!  Freight was insane not to mention Brandon's personal demuraging  fines at the port of LA. nearly doubled the entire cost to get it here and well its here and some day I'm gonna be a boomer with a boomin ass little bay sprayer!!

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Tom Kirkman

Anarchist
If you take a very close look at your 16.5 and the Diam 24, you will find they are almost exactly the same boat. The 16.5 has a small cuddy and about 6 to 7 feet cut out of the hull mid-sections. Otherwise, they are almost the same boat.

https://imgur.com/qbVHL23

 
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Not a boomer but did allot of research and instead of just another Getaway on the bay I finalized down to 2 boats here in Hawaii that dont exist, Diam 24 and any of the Astus's.  Which in the case of single handling in good wind and the fact it can be broken down reasonably and budget it was the 16.5 that was chosen.  But man did the pandemic make me pay!!  Freight was insane not to mention Brandon's personal demuraging  fines at the port of LA. nearly doubled the entire cost to get it here and well its here and some day I'm gonna be a boomer with a boomin ass little bay sprayer!!

View attachment 479947
Damn, that looks like a fun boat for K-Bay!

 

Tom Kirkman

Anarchist
When you start sailing it, be advised that it's not going to run like old fashioned trimarans. This is a modern VPLP design. The ama bows will want to get down deep into the water and that's perfectly fine. Let them go. The sharp rocker on the main hull will still keep the main hull clear of the water other than maybe 2 or 3 feet in the area where the centerboard is. Watch some Diam 24 and Astus 16.5 videos to get the idea. This is a modern trimaran and will run bow low and stern high, which is exactly how it is designed to run.

 

skirret

New member
When you start sailing it, be advised that it's not going to run like old fashioned trimarans. This is a modern VPLP design. The ama bows will want to get down deep into the water and that's perfectly fine. Let them go. The sharp rocker on the main hull will still keep the main hull clear of the water other than maybe 2 or 3 feet in the area where the centerboard is. Watch some Diam 24 and Astus 16.5 videos to get the idea. This is a modern trimaran and will run bow low and stern high, which is exactly how it is designed to run.
Been watching and rewatching all these vids including yours for more than a year.. Getting her use to the Hawaiian waters slowly(this place sinks modern designs), I been pointing up in big puffs when she starts to raise and ama submerges (which is painful to kill the puff) but keeping it safe for a while.. 15knots of wind we did an easy 15.7 knots speed on the garmin without the gen deployed.. Im replicating your tiller setup right now but wondering about..

positives or negative of single line shrouds(currently setup) compared to the 2 adjustable lower (cap) shrouds thats part of the builders rigging setup.

mast raising are you stepping or built some kinda winch system?

the weight is similar to hobie 21, any tips on single hand launching on beach cart or better to just use the trailer? 

Watching that center haul move is some of the best boat porn I've ever seen!!

 

Tom Kirkman

Anarchist
The original boats came with single side shrouds. They later transitioned to the side bridle system. I found the latter to hinder my ability to get out on the rail as far as I wanted and since the single shroud set-up provides an equally stiff platform with no disadvantages that I'm aware of, I have stuck with it. 

I use a wishbone to raise the mast. Takes all of 5 minutes as long as you keep all the stays and shrouds attached when the mast is down. I can send you some photos if you'd like.

I ditched the dolly. Too much boat for a dolly. Just launch it straight off the trailer. This will entail that you reconfigure your trailer for the boat instead of the dolly. But you only have to do that once.

The ama bows are designed to run down with the sterns high. It's magic. But the straight beams will slow you down if you put them in the water. That's the only downside to the straight sliding beam system, but it does make rigging quick.

 
Tom,

I'd be interested in seeing your wishbone setup if you have any pics?

My Adventure 600 has been vandalised yet again (this time destroyed the furling jib by releasing just as storm Arwen cam in) and is not going to be sailed until at least March now while I fix things up and one thing I want to improve is the mast raising system.

I'm currently using fairly short stays that clip onto the float pivot points and have the side stays connected but the height is not really sufficient to give enough confidence in the lateral stability especially if there is any wind.

I'm thinking something like this:



at around 11:50 would be great, just need to find a strong clip that can be remotely released and clipped back on for lowering.

I'm also thinking about adding a secondary set of stays that will triangulate the mast to the rear beam pivot while folded and then the main side stays can be used for additional lateral stability by attaching them into ground anchors.

Currently with single stays I need to release them one at a time using the main sheet to triangulate it while moving the stay, then move the main sheet and repeats which adds about 5 minutes to the set up / take down time.

 

skirret

New member
The original boats came with single side shrouds. They later transitioned to the side bridle system. I found the latter to hinder my ability to get out on the rail as far as I wanted and since the single shroud set-up provides an equally stiff platform with no disadvantages that I'm aware of, I have stuck with it. 

I use a wishbone to raise the mast. Takes all of 5 minutes as long as you keep all the stays and shrouds attached when the mast is down. I can send you some photos if you'd like.

I ditched the dolly. Too much boat for a dolly. Just launch it straight off the trailer. This will entail that you reconfigure your trailer for the boat instead of the dolly. But you only have to do that once.

The ama bows are designed to run down with the sterns high. It's magic. But the straight beams will slow you down if you put them in the water. That's the only downside to the straight sliding beam system, but it does make rigging quick.
Yes please share your mast raising setup Mahalo. Its nice that it has a beefy mast compared to a hobie of same size but the mast ball and mast base dont click/lock in so hand lifting and lowering the last 20deg or so there some kick back where you need a second person to literally catch the mast!! Also, havent tied in those 2nd set of shrouds on the center hull, do I even need them if I'm setting up the boat ama's out/lifting mast every time?

I bought some 10in caster wheels and was going to make a front wheel helper for the beach dolly but now that you reconfirm the beach trolly is rubbish I think this is the way with this trailer helper from amazon 70$ 

https://www.amazon.com/gp/product/B008CE0TN4/ref=ox_sc_act_title_2?smid=ATVPDKIKX0DER&psc=1

 

MultiThom

Super Anarchist
1,695
367
Benicia, CA
around 11:50 would be great, just need to find a strong clip that can be remotely releasd and clipped back on for lowering.

I'm also thinking about adding a secondary set of stays that will triangulate the mast to the rear beam pivot while folded and then the main side stays can be used for additional lateral stability by attaching them into ground anchors.

Currently with single stays I need to release them one at a time using the main sheet to triangulate it while moving the stay, then move the main sheet and repeats which adds about 5 minutes to the set up / take down time.
If you are going to do this often, that would be a lot of fuss each time (for me).  But if only raise the mast once or twice a season...Here's an article about the basics of mast raising.

Basics of Mast Raising

As it says, only need "something" to provide leverage (e.g., gyn pole).  "Something to keep the mast along the centerline (keep it from rotating side to side) as you bring it up.  Something to keep the leverage pole along the centerline (usually some temp shrouds).  

Also, you should only have to triangulate once and then mark the positions on the shrouds. 

 

Tom Kirkman

Anarchist
Yes please share your mast raising setup Mahalo. Its nice that it has a beefy mast compared to a hobie of same size but the mast ball and mast base dont click/lock in so hand lifting and lowering the last 20deg or so there some kick back where you need a second person to literally catch the mast!! Also, havent tied in those 2nd set of shrouds on the center hull, do I even need them if I'm setting up the boat ama's out/lifting mast every time?

I bought some 10in caster wheels and was going to make a front wheel helper for the beach dolly but now that you reconfirm the beach trolly is rubbish I think this is the way with this trailer helper from amazon 70$ 

https://www.amazon.com/gp/product/B008CE0TN4/ref=ox_sc_act_title_2?smid=ATVPDKIKX0DER&psc=1
Pick up a collapsible speaker stand on Amazon or wherever. Set the mast on it and raise it up to 7 or 8 feet high. That way you're starting from above level and pressure stays on the mast ball during the entire process, up or down.

I doubt you can move the Astus on the trailer with that helper from Amazon. Back it in with your vehicle. There is a point beyond where a boat can be manhandled on a dolly or trailer.

 
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randii

Member
430
130
Sacramento area
Pick up a collapsible speaker stand on Amazon or wherever. Set the mast on it and raise it up to 7 or 8 feet high. That way you're starting from above level and pressure stays on the mast ball during the entire process, up or down.
H18 and F18 experience: a helper on a 6 foot ladder makes raising simple. I do it solo regularly with a carpet-topped 10 foot ladder. With the ladder just forward of the balance point of the mast, it is easy to pin the ball/socket and that initial angle gets you past the hardest part of pivoting the mast, especially if the boat is on a trailer.

The speaker stand sounds good, but a ladder is a handy thing to have on the trailer.

 

MultiThom

Super Anarchist
1,695
367
Benicia, CA
H18 and F18 experience: a helper on a 6 foot ladder makes raising simple. I do it solo regularly with a carpet-topped 10 foot ladder. With the ladder just forward of the balance point of the mast, it is easy to pin the ball/socket and that initial angle gets you past the hardest part of pivoting the mast, especially if the boat is on a trailer.

The speaker stand sounds good, but a ladder is a handy thing to have on the trailer.
Certainly you could go with external supports, but the solution I chose was to alter the trailer and add a removeable rear mast support.  Yah, you do have to remove the rear support prior to launch but that's no harder than finding somewhere to put your speaker stand or ladder.  Did that for a hobie catamaran trailer.  Trailer guy just welded a big U of steel cage tube at the stern and put a tube stand for the pinnable support.  Also helped  the mast stay flat during transport.  Was worth the 300 bucks.

 

Fat Point Jack

Super Anarchist
2,227
297
Here's another one.


20' Carbon Fiber Trimaran kayak with sail kit and custom trailer! - $6,500 (St. Petersburg)




‹image 1 of 3›




00F0F_h65Z74ySCWyz_0lM0t2_600x450.jpg

 
 











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© craigslist - Map data © OpenStreetMap





length overall (LOA): 20
propulsion type: sail




Perfect for the Everglades Challenge! Full carbon fiber hulls, the entire boat, fully rigged, weighs about 170 lbs and can easily be picked up by two people. Comes with fully battened main sail, roller furling jib, roller furling screecher (spinnaker), trampolines, skirts and covers, AND A CUSTOM TRAILER! My friend and I bought this a year ago with the intention of doing the Everglades Challenge but life got in the way, our loss is your gain. The boat is in great shape and ready to take you on any adventure you can throw at it.

https://tampa.craigslist.org/pnl/boa/d/saint-petersburg-20-carbon-fiber/7432267008.html

 

sail(plane)

Anarchist
681
103
Here's another one.


20' Carbon Fiber Trimaran kayak with sail kit and custom trailer! - $6,500 (St. Petersburg)


‹image 1 of 3›





 
 















 
 
 
 
 
 




 


 
 

© craigslist - Map data © OpenStreetMap





length overall (LOA): 20
propulsion type: sail



Perfect for the Everglades Challenge! Full carbon fiber hulls, the entire boat, fully rigged, weighs about 170 lbs and can easily be picked up by two people. Comes with fully battened main sail, roller furling jib, roller furling screecher (spinnaker), trampolines, skirts and covers, AND A CUSTOM TRAILER! My friend and I bought this a year ago with the intention of doing the Everglades Challenge but life got in the way, our loss is your gain. The boat is in great shape and ready to take you on any adventure you can throw at it.

https://tampa.craigslist.org/pnl/boa/d/saint-petersburg-20-carbon-fiber/7432267008.html
Oh that looks so good! If I was close I think I would buy it and then figure out what to do with it

 
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