Small trimarans under 20'

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You could add a small UptiP or surface piercing foil to each ama to keep it out of the water most of the time. I'm sure you know about Hydroptere-once the fastest sailboat on the planet. Her amas-like mine- are designed for incidental contact with the water when she is foiling. They started out with , basically, just a small hull rounded and short but they found that when that thing would hit the water it would put the brakes on-hard. So they designed a stepped planing hull so there is much less drag should it contact the water while they're foiling.

Pictures-- 1-2-Hydroptere's original ama, 3-5-her stepped planing ama. The part of the ama aft of the step is just for reserve buoyancy:

 

My ideal 16' trimaran

From post 428:

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I would want a daysailing high performance tri that was faster than any cat it's own length, that was easy and fun to sail double or singlehanded, that was either self-righting or rightable by a singlehanded crew, that was dry with no "fire hosing" of the crew in fast conditions. That was fast in light ,medium or heavy air. It would have a performance limit of two crew at 185lbs each . Crew would sit on either side of the cockpit and not have to ever move more than about 3' for any tack or gybe in any condition. Emphasis would be placed on very comfortable crew seating. Any and all boards or foils would be retractable with controls accessed from the cockpit. Rig would be reefable. A large screecher or asy spin would be included in the sail plan. It would have a built in cooler and dry storage with room enough to carry a two person tent and some other supplies.
It would be easily trailerable and be able to be sailed off a beach.
Oh, and it would be red.....

 

How about a jet ski with outriggers and a rolled up windsurfer rig in case of breakdown? The only thing is like the model T it only comes in one color.....marketing thing, racing stripes extra.

 

Equal to or faster than a Hobie 16.
Fold up akas.
Sitting benches with feet in the hull, but the ability to sail from a wire.
No fixed cabin, etc.
A reasonable plan for self righting (like a Hobie 16).

 

You are pretty well talking about a Piver Frolic.

 

See here for the Dibley 16 footer: http://www.boatdesign.net/forums/multihulls/dibley-5000-off-beach-trimaran-52521.html
This is the first oversquare small tri that I've seen and they're even considering foils down the line! Great to see a major designer do an advanced small tri-very exciting.
And its red! Interesting that it's upwind sailarea is only 142 sq.ft. when it clearly has the power to carry more sail-at least from the limited info so far. A Hobie 16 carries 218 sq.ft- 54% more......
Correction: Thanks to Doug Halsey, it appears the beam is only 3m, not 19'10". Power to carry sail is far less than I thought based on the greater beam.
Specs:
LOA 5.000 m 16’-5”
LWL 4.890 m 16’-1/2”
BEAM (Sailing) 3.000 m 19’-10”
Beam (Trailering) 1.096 m 3’-7”
Displacement (Sailing) 155 kg 342 lb
Displacement (Lightship) 75 kg 165 lb
Sail Area 13.24 sq.m 142.5 sq.ft
SA/Disp Ratio 46.6
Disp/L Ratio 37

click--

 

I really doubt it.
What did it weight?

It had lots of weight and modest sail area. Slow compared to a beach cat.

 

There's an obvious error in converting the beam from meters to feet (probably just typographical). When you consider the actual beam, the moderate ama displacement & the 1-man crew, its available righting moment compares more closely to a Hobie 14 than a 16. So 142 sq.ft. is probably about right.

 

Well, I sure missed that. Very disappointing!

 

First seen in the " .....no foils" thread posted by "cmclaughlin", this looks like a neat small tri:
I haven't checked these specs for misprints etc:

LOA 5.40m (17'9")

LWL 5.40m (17'9")

Beam main hull 0.70m (2'3")

Draft 0.12/0.70m (5"/2'3")

Beam sailing 3.28m (10'9")

Beam folded 1.30m (4'3")

Mainsail 5.5sq.m (59sq.ft)

Jib 2.3sq.m (25sq.ft)

Weight main hull 32kg (71lb)

Weight sailing 70kg (154lb)

Mast height 5.1m (16'9")
Ama length 3.34m (11'0")
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http://www.dixdesign.com/Trika_540.htm

https://www.youtube.com/watch?v=y5B_AtWt98o

 

Sea Flash and/or Stress 14

From Small Trimarans--updated info from the designer here: http://www.studiosculli.com/portfolio/stress-14/

LOA-4.35m/ 14.27'
Beam-2.8m/ 18'
SA-11sq.m/ 118 sq.ft.
Weight-70kg / 154lb.

Render's of Stress 14(updated version of Sea Flash) :

 

Wow! That stress 14 looks good. Looks like it has potential!

 

This looks like a Supernova from the 60's or 70's if I remember right.
Same aka's on struts (a little modernized), ama's too short and too far aft with a very small volume.

 

Supernova

That's great, Marc! I don't think I ever heard of this before....
Specs-
LOA-15'
Beam-10.5'
SA-129 sq.ft.-86 main, 43 jib
Weight-203lb.
designed by Pors Nielson

 

Exocet 19 Trimaran foiler

I've been following this offering from Perspective Design. The tooling was started last summer so something must have slowed them down. Really looking forward to this one! New to me image below:
click-