12' and Under Trimarans-Ideas and Designs

Well known, wide spread and cheap to get when used:

MOARA : http://images.google.de/imgres?imgu...ved=0ahUKEwjribyPy-jOAhXDO5oKHUSiCLoQ9QEIIzAA

http://www.dailymotion.com/video/xezjza_trimaran-maora-morbihan_sport

Best for children



Can be bought and sailed as a "Prao"


Racing version ???

 

Are there any active classes sailing these boats anywhere ?

 

As far as I know fabrication has stopped and in the forum there are no new postings (one exception http://monvoiliermaora.free.fr/forum/forum_msg_recent.php ). May be you can find more about active classes sailing. Sorry

http://images.google.de/imgres?imgu...ved=0ahUKEwjvqq6iy-jOAhXrB5oKHSy_DrMQ9QEIJzAC

 

Small tri's

I was referring to small tri's in general not just the Moanna. If I remember the Marples was built for a class and so was the Scarab but I've never seen much take up. Didn't the Italians have a bit of a circuit going at some point ?
Makes sense to me as a training boat, stable, safe and fun ! Rather than tippy and a bit scary ?

 

Safe is boring.

I don't want to be sitting in the couch outside.

 

WETA 4.4 is a tough concept to beat

http://www.wetamarine.com/

 

Weta-wrong thread

You're right but this is the 12' and under thread-the Weta has been mentioned in the Under 20' trimaran thread. The Weta is 14' ........

 

oh Im sorry
I didn't make the 12' and Under Trimarans-Ideas and Designs absolutely transparent, in that take the Idea, and make it a 12' or under Design

however...

 

They do not only have a bit: http://www.diecipiedi.it/ns/flotta/flotta2.html and http://smalltrimarans.com/blog/growing-the-10-foot-trimaran-class/

http://smalltrimarans.com/blog/more-photos-of-the-uffa-10-trimaran-under-construction/

https://www.youtube.com/watch?v=ICT5KN2HxhI

 

From the time this thread started I have been thinking that the most useful conversation would be 'Why should a trimaran be 10 to 12ft long?' I tend to think that there are major limitations inherent to that length and not many good functional 'fits'.

10 to 12
-single hand only
-L/B of hulls challenged by load -limiting performance
-boats come out more like stabilized skiffs than tris
-easy to right capsize
-wood usage? Lots of fragile thin ply.
-ergonomically much better than 12 ft cat -sit up, feet down and room to duck boom in main hull

Compared to 14' or more...
-single, double or more crew
-L/B 8+ is easy -less of a drag hump to plane
-all tri modes, depending on load and wind
-with care in design, still single hand self recovery from capsize
-bigger, but handling, care and storage are about the same as 10-12

I have a Hobie 3.5 I think about making a tri with -but I never considered a 12ft main hull -too short and pointless. More likely a 16+ft covered canoe main... the performance hit of the wetted area is more than covered by the greater length, possibly narrower wl beam.

 

MPX12 (mini Fire Arrow)

I did a lot of research into a 12'* high performance trimaran design-the full specs are here:
* my apologies: I forgot that this tri was 7" longer than 12'......
http://www.boatdesign.net/forums/multihulls/mpx-11-very-small-high-power-trimaran-33686-15.html (scroll down)
If I can overcome my physical trouble I'm leaning toward building a slightly detuned version of this boat-maybe a bit longer. This was originally conceived of to have just planing amas no ama foils to go along with the main foil. Now that would be different : she'd still have planing amas but would also have ama foils.
There are a lot of fast 11-12' monohulls around-no reason in the world why a small high powered foiling tri would not work, I built a concept model:

MPX-12 Specs-short version

-- LOA-12' 7" (not including rudder gantry )

-- LWL-12' 7"

-- Main hull beam-5.29'-

-- Main hull beam at the waterline -3'

-- Overall beam- 17.5'*(15' cl ama to cl ama) updated and corrected 8/19/10--NOTE: approx the same overall Beam/overall Length as Hydroptere.(not including gantry on MPX-12) *tentative as of 11/10/10

-- LOA- ama-10'

-- Ama LWL(F&A dimension of planing surface)-1.5'

-- Ama beam- 2.5(max and max at waterline-tentative)

-- Ama Buoyancy - 3.25 cu.ft/ 208lb / 53% of sailing weight

-- Sail Area- 178 sq.ft /25.5' mast length. Slightly taller than a scaled down A Class Cat.



MPX-12-short rig:

 

Banshee Ambulance

Another potentially high performance tri was the 12' Banshee Ambulance based on a Cherub main hull:

 

12 and under(more or less)

==================
Might work-but I didn't understand that from your post. Sorry....

 

Doug

Bazooka at 3.7 is 4" over 12' so apologies.

22 are in New Zealand, 1 is in Fiji at a resort and at least 4 that are known of in Australia 2 being sold second hand recently.

3 are in build presently.
1 x Intro model, 1 x active model and 1 x excite model.

Again apologies for being outside the 12' scope.

Team Ezifold

 

Thats ok. Can you post some more detailed specs? Looks good!