Trimaran help !?

See http://mysite.verizon.net/res78939/index.html the current home of CROSS multihull designs. All the original designs by Norman A. Cross, N.A.

Jeff

 

For inland work some sailboats are fitted with a tabernackle , a pivot on deck to allow the deck stepped mast to lower.
Its usually a big job done rarely.

For more frequent use I have seen a flag pole base that has a curved rack & pinion gear set , used for easy geared controll. Off the shelf but heavy.

Simplest is the old Brit concept of the Lutchet.

Here the mast is pivoted above deck level , but the stick is KEEL stepped , rising thru the foredeck from a simple hatch.
The foot of the mast is weighted and its a very light job to raise & lower the mast with rigging.

Weight is a dirty word on a multihull , and the room for the stick to swing might play havoc with any interior setup.

FAST FRED

 

plan from the tri ?

Hi Dale,
wish you´re lucky with the crew and the project.

Do you have a plan of building the tri Pierre 1er first it was called ?

I am searching for it making a transformer in alloy (aluminium you call it in german).

May be you can give hints ?

Yours,
Mike

 

Hi Mike - RE your posting #17 - I do not have a set of plans for the design - just 100+ pages of modification drawings for use of the boats in the movie - this gave me an insight to the designers design / engineering emphasis - in deferance to the design groups' creativity etc I will not pull off dimensions from this design for anyone - the boat was designed & engineered for composite construction - I don't think aluminum construction would get it as far as this particular design goes - - - if you are interested in building a 50 to 60 foot fast trimaran sailboat you could contact Nigel Irens or Kurt Hughes as both have stock designs in this size - composite construction & expensive to build - - - the boat I have - (sailing version of the 2 WATERWORLD boats) was built from the Pierre Le 1er / Primagaz molds - the design is 12 years old & hopelessly out of date for ORMA 60 racing - (but some of the records set by Primagaz still stand) - both racing sisterships flipped once each in their racing history - (Piere Le 1er in 1992 off Newfounland - & Primagaz / Rexona Men 2002 Route Du Rhum) - - the ORMA 60 design rules allow 60 feet length - up to 60 foot beam & a mast height of 100 feet off the water - crews of 11 are normal for the european Gran Prix races - the masts cant athwartships & fore & aft & rotate - daggerboards are 15+ feet in length - foils in the forward locations of the floats - the boats are overdriven & sail faster than the wind in light airs - the boat I bought clocked 33 knots with all the heavy movie props & who knows how many humans aboard - & the stick was only 75 feet instead the racers 92+ feet & the sails had bullet holes in them! - I intend to stick with the 75 foot stick - put the boat back at its designed beam of 49 feet - (both WATERWORLD boats were built at 45 feet) - I removed all the aluminum movie props from the 28 foot boom - about 200 pounds of telescoping boom props - I've removed the rotating mast base & rotation limiter from the stick - allowing the use of spreaders instead of diamonds if the mast rotates - will be moving the mast aft of its present location & daggerboard case forward of the mast instead of aft of it for better balance - the 28 foot boom is slip-fit construction so it will be very easy to shorten it if necessary - I intend to end up with a short-handed rig sort of like the RATHER FUNKEY concept of trimaran designer Jim Brown & Joe Hudson - ie. if you have easily driven hulls then you can get away with a ridiculous rig - been collecting Size 5 running rigging gear - ended up with an antique Lewmar Pedestal Drive for the big harken mains - still looking for a water balloon launcher - - - Dale Miami

 

John Shuttleworth...

Hello...

Check out his site - writing - and extensive bibliography...

See http://www.john-shuttleworth.com/Articles/NESTalk.html ...

SH.

 

I have a simple question. If it is possible. Does anyone have any way to get a good speed length ration comparison for a mono hull ,a cat, and a tri. Each with comparable length and weight. For ease, lets say each has a displacement hull.

Thanks

Thomas

 

trimaran help 1

I too am new here, I cant help noticing that the yachting world never kept up with a design feature first shown in the 80's America's Cup challenge. Have you consider the aluminium? mainsail denise conner used on the catamaran he used in 89? This extended out from the mast - retractable - and the mast was rotating. He claimed he was able to maintain approximately 11 knots in 10 knot winds even tho the "sail" only extended approx 3m along the boom without the cloth sail raised. It was an interesting concept with exceptionally high speeds achieved throughout the racing

I have a 1969 40' Piver victress modified. The mast was actually shortened due to the conditions in New Zealand which caused the original to snap. No this yacht is not geared for racing due to very very basic rigging design. However i have had this vessel with Genoa raised fully running in 45 gusting 55 knot winds. This was in moderate seas.

I am currently looking at at 45-50 foot cat and fitting a 60 foot centre hull. Please let me know how you have progressed
Stefan

 

Hi! I'm very, very interested in the ugly sister project. How can I contact you for more informations about this project? Kpt. Blaubär
I made some photos out of the movie. They were about 300 or 400. contact albertbuettner@gmx.de