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international 23 catamaran for sale

  • international 23 catamaran

Crowther international 23 circa 1985 catamaran

Crowther international 23 circa 1985 catamaran

Crowther International 23 ’ good condition . New rigging fitted ($1000) new paint .new anti fouling .racing sails jib and main...

2023 Beachcat Tiki 23 Tiki International | 23ft

2023 Beachcat Tiki 23 Tiki International | 23ft

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2023 Beachcat Tiki 23 Tiki International | 23ft

SEE AT MIAMI INTERNATIONAL BOAT SHOW Feb 15-19, 2023 Located in-water, at the Venetian Marina, Slip SI699, behind the downtown Marriott....

Tiki International Yacht for Sale 26 Beachcat Yachts Miami, FL

Tiki International Yacht for Sale 26 Beachcat Yachts Miami, FL

Beachcat 26 tiki coi.

WILL BE ON DISPLAY AT THE MIAMI BOAT SHOW, FEB. 15-18, 2024, LOCATED IN FRONT OF THE CONVENTION CENTER, IN PRIDE PARK!!We are very pleased to offer for sale this...

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2023 World Cat 235 CC

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Manufacturer Provided DescriptionOur 235CC offers you 23 ’ of do anything, go anywhere fun. With a generous 8’6” beam, it features a cockpit...

2021 World Cat 230 DC

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2022 World Cat 235 CC

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American Offshore

American Offshore

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2023 Beachcat 26 Tiki COI Tiki International | 26ft

2023 Beachcat 26 Tiki COI Tiki International | 26ft

WILL BE ON DISPLAY AT THE MIAMI BOAT SHOW, FEB. 15-18, 2024, LOCATED IN FRONT OF THE CONVENTION CENTER, IN PRIDE PARK!! We are very pleased to offer for sale...

NEW 10m 23 PAX Ferry

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2024 Fountaine Pajot Catamaran Astrea 42 | 41ft

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Lagoon Power Lagoon 630 Motor Yacht (2016) For sale

Lagoon Power Lagoon 630 Motor Yacht (2016) For sale

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Custom 50 Feet Aluminium Catamaran (2022) for sale

Custom 50 Feet Aluminium Catamaran (2022) for sale

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English LOA (including bowsprit): 16.95 m / 55 ftLWL: 14.95 m / 49.05 ftWidth: 7.00 m / 23 feetNo. Cabins: 4 Guest + 1 Skipper CabinNo. Berths:...

Custom 50 Feet Aluminium Catamaran (2022) for sale

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Perry 43 Sailing Catamaran 4 cabin 3 bathroom version

Perry 43 Sailing Catamaran 4 cabin 3 bathroom version

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reduce catamaran beam

Discussion in ' Multihulls ' started by brendan gardam , Feb 11, 2020 .

brendan gardam

brendan gardam Senior Member

hi everyone. i have purchased an old crowther international 23 which is in great condition. i am toying with the idea of reducing the beam to 10 ft to make it trailerable without having to spend hours setting it up at the ramp. i know the sail rig will need new calculations and cutting down to suit. would it still be a reasonable performer with a 10 ft beam . if i was leaving the boat on a mooring i wouldn't consider doing this but i prefer to keep boat at home if possible. in australia we can get oversize permits for daylight travel up to 3.5 mts. just wondering what you think of this idea and if anyone else has done something similar. another option maybe a side tilting trailer like some racing cats use. don't know if thats practical though.  

bajansailor

bajansailor Marine Surveyor

Welcome to the Forum Brendan. When I googled your cat some photos came up which suggest that she is already very beamy for her length - I couldn't find any dimensions, but maybe 14'? If so, reducing the beam to 10' will be quite drastic.  

oldmulti

oldmulti Senior Member

Brendan. You said the oversize permit allows you to trail a 3.5 meters wide or 11.5 foot wide boat. The International 23 in original format was 11.5 foot wide when expanded. No need to cut the beam down at all. Or if you want 10 foot (3.05 meter)beam just push the hulls together do a small screw or bolt to hold hulls at 10 foot. Yes the side shrouds will need to be altered at 10 foot but nothing else needs to change. Just be a little more careful when sailing the 10 foot wide boat. Hope you have fun.  

Alik

Alik Senior Member

can You carry the boat heeled, on trailer?  

rxcomposite

rxcomposite Senior Member

Alik said: ↑ can You carry the boat heeled, on trailer? Click to expand...
thanks for the replys. if its only 11ft5 then i don't need to do anything. thanks oldmulti. i thought they were 16 ft wide. i haven't opened it up yet. converting trailer to heel was another option but sounds like i don't need to now.  
bajansailor said: ↑ Welcome to the Forum Brendan. When I googled your cat some photos came up which suggest that she is already very beamy for her length - I couldn't find any dimensions, but maybe 14'? If so, reducing the beam to 10' will be quite drastic. Click to expand...
after looking at the boat expanded out there is no way i would want to tow it like that. the new plan is to narrrow the beam to 2.7mt or 9 ft. i know i will lose performance but i am not a racer and it is still going to outsail most mono trailersailers while sitting flat . i know if i put it on a mooring i won't get enough use out of it . as a proper trailersailer it will get used and i can do all the maintenance at home.  
oldmulti said: ↑ Brendan. You said the oversize permit allows you to trail a 3.5 meters wide or 11.5 foot wide boat. The International 23 in original format was 11.5 foot wide when expanded. No need to cut the beam down at all. Or if you want 10 foot (3.05 meter)beam just push the hulls together do a small screw or bolt to hold hulls at 10 foot. Yes the side shrouds will need to be altered at 10 foot but nothing else needs to change. Just be a little more careful when sailing the 10 foot wide boat. Hope you have fun. Click to expand...
The original design was a trailable 23 foot cat. Locke designed the boat on that principle. The maximum length of the cross beam therefore could not be any longer than 8.2 foot. The amount of beam left in the fiberglass tubes was at an absolute minimum of 1.6 foot. The very first brochures said 11.5 foot and the two 23's I have seen have that beam. Now it depends on what International 23 you purchased. There was a modified one in Werribbee ? which did not have fixed keels and other mods done by a guy who wanted more performance. No fixed keels equals not standard. Later versions may have been wider or people may have tried to push the hulls out further on the beams leaving only EG 1 foot in the fiberglass tubes. When I spoke to Locke at the time of production he said wider beams may be able to be done but he did not predict a long life and there was minimal safety margins in the fiberglass tubes, that the beams were inserted into, if you still maintained the 8.2 foot beam. The E8150 crossbeam was OK, it was the tubes that they inserted into was the problem. If the aluminum beams are 8.2 foot and the fiberglass cross beam support tubes are 4 foot you have a "standard" boat otherwise you have a later or modified version.  
thanks for the quick reply . it amazes me how much knowledge you have about cats and willing to share it as well. my boat is the one from werribee, named matuka. the previous owner told me he bought it off a guy that did a lot of mods for speed, and it held the race record for the geelong to st kilda race for a while. it has daggerboards and no keels. there are no fibreglass tubes so i guess he must have swapped them for aluminium. the po told me it is 16 ft beam which would be the same as a seawind 24.  
oldmulti said: ↑ The original design was a trailable 23 foot cat. Locke designed the boat on that principle. The maximum length of the cross beam therefore could not be any longer than 8.2 foot. The amount of beam left in the fiberglass tubes was at an absolute minimum of 1.6 foot. The very first brochures said 11.5 foot and the two 23's I have seen have that beam. Now it depends on what International 23 you purchased. There was a modified one in Werribbee ? which did not have fixed keels and other mods done by a guy who wanted more performance. No fixed keels equals not standard. Later versions may have been wider or people may have tried to push the hulls out further on the beams leaving only EG 1 foot in the fiberglass tubes. When I spoke to Locke at the time of production he said wider beams may be able to be done but he did not predict a long life and there was minimal safety margins in the fiberglass tubes, that the beams were inserted into, if you still maintained the 8.2 foot beam. The E8150 crossbeam was OK, it was the tubes that they inserted into was the problem. If the aluminum beams are 8.2 foot and the fiberglass cross beam support tubes are 4 foot you have a "standard" boat otherwise you have a later or modified version. Click to expand...
Sorry I dont have full details of the Internal 23 at hand the attached diagram may help.  

Attached Files:

Inter 23 plan.jpg.

oldmulti said: ↑ Sorry I dont have full details of the Internal 23 at hand the attached diagram may help. Click to expand...
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Two 35m offshore security patrol vessels. The vessels are classed by Bureau Veritas (BV) and were constructed by Veecraft Marine in Cape Town, South Africa for an undisclosed client in Lagos, Nigeria.

30m Monohull Landing Craft

The Voea Late represents a modern take on a classic military design. Perfect for operation in areas with minimal shore side infrastructure.

The seventh Incat Crowther-designed vessel for Thai operator Lomprayah.

33m Catamaran Cruise and Dive Vessel

Evolution sets the benchmark for customer experience on the Great Barrier Reef, blending motor yacht style with commercial vessel efficiency and ruggedness.

30m Wave Piercing Catamaran Utility Craft

A 30m Wave Piercing Catamaran Crewboat built by Veecraft Marine, South Africa for the Nigerian oil fields.

A ground-breaking research and classroom vessel operated by Norwalk Aquarium in the USA. This vessel features 2 separate classroom areas, touch tanks, and ADA accessibility. Hi-tech batteries, solar panels and a hybrid drivetrain combine to provide a …

A three-deck catamaran ferry operating in New Zealand.

57m Catamaran Dive Support Vessel

Bhagwan Dryden is a modern, high-tech vessel which is a first-of-type fully integrated catamaran Dive Support Vessel. She features multiple power generation units coupled to an advanced control system to allocate power to azimuthing propulsors and de …

A purpose-built monohull dive support vessel with fully integrated dive systems.

70m Catamaran Fast Crewboat

The Muslim Magomayev fast crew boat (FCB) is the world's biggest high-speed crew catamaran vessel, built primarily to carry crew to multiple offshore installations.

Amaroo is the third vessel for Amaroo Cruises over a period of 34 years. A functional, simple, robust low-draft vessel offering exceptionally low running costs.

37m Monohull Dinner Cruise Vessel

A spectacular dinner cruise vessel featuring large glazing, bars on every deck, full-size commercial galley and bridal and green rooms.

24m Catamaran Patrol Boat

Environmentally-friendly catamaran designed to patrol pristine coastal areas. Designed to have minimal impact on the environment it is protecting.

48m Monohull FSV

A fleet of hard working rugged Fast Supply Vessels to operate in Brazil.

A new-generation rocket vessel, with cutting edge design, low fuel consumption and increased capability for iconic Sydney Harbour operator, Captain Cook Cruises. 4 vessels in service.

20m Monohull Crewboat

A monohull crewboat with versatile forward cargo deck and bulletproof pilot house.

42m Monohull Infield Utility Vessel

A series of Monohull Infield Utility Vessels operating in the oil fields in Brunei. Exceptional performance and comfort.

45m Monohull Crewboat

A 45m fast crewboat for oil field crew transfers.

A robust, rugged ferry capable of transporting passengers and cargo. This vessel has been designed specifically for reliable operation in rough waters.

A low-impact ferry for operation by Southern Discoveries on New Zealand's South Island.

34m Catamaran Motor Yacht

An exciting motor yacht project bringing together a team of world leaders in the fields of marine design and engineering. Images courtesy Curvelle Yachts.

36m Monohull Crewboat

The first of this type of vessel built by Cheoy Lee, Swissco Cheetah is the latest in a long line of collaborative efforts between builder and designer, including a large number of successful aluminium and composite passenger vessels.

20m Catamaran Wind Farm Service Craft

A fleet of Catamaran Service Craft offering exceptional stability and efficiency.

39m Catamaran Motor Yacht

A 39m aluminium hulled motor yacht built to exceptional standards, exhibiting excellent range and seakeeping.

A 24m Catamaran Ro-Pax Ferry contract won by close cooperation with a fast growing European shipyard. Competitive vessel package and best-value build costs were imperative to the successful tender bid.

35m Catamaran Utility Vessel

A third vessel for a repeat customer. Vessel developed in conjunction with builder and operator, benefitting from experience of Unlimited and Limitless.

This is the third vessel in a line of new-generation rugged, efficient comfortable 24m passenger vessels.

24m Catamaran Scientific Research Vessel

24m Catamaran Scientific Research Vessel for operation in the Baltic Sea. Rugged, efficient platform suitable for a multitude of exploration uses.

30m Monohull Crewboat

A simple and robust fast crewboat for oil field crew transfers.

This vessel features modern styling and represents an exciting new generation of catamaran. Efficient operation and excellent seakeeping are hallmarks of this hull form.

28m Wave Piercing Catamaran Crewboat

A new interpretation of the Wave Piercer concept for use in offshore energy installations. Highly functional, stable, safe and efficient platform.

29m Catamaran Utility Vessel

29m Catamaran Utility Vessel for operation in Australian coastal waters. High payload, speed and 15 tonne bollard pull. Flexible uses such as chase boat, crew transfer, fast freight or interisland transport.

30m Catamaran Utility Vessel

A versatile catamaran utility vessel that will perform seismic and crew supply roles in South East Asia.

46m Catamaran Overnight Vessel

A 46m cruise vessel operating in New Zealand's Bay of Islands. Cost effective mini hotel solution targeting volume backpacker trade.

Three vessels deployed in Cancun, Mexico have resulted in significant fuel savings for the operator. Built from Incat Crowther supplied pre-cut aluminium kits.

35m Monohull Landing Barge

35m landing barge. Various capacities and configurations developed based on this prior, proven platform.

High-end super yacht, recipient of multiple awards including the “Australian Super Yacht Award” and “World Super Yacht of the Year”.

58m Catamaran Vehicle and Passenger Ferry

A 58m medium-speed passenger and vehicle ferry capable of carrying 413 passengers and 49 4WD vehicles. Capable of beach landing. Steel hull with aluminium superstructure. This vessel features very low fuel consumption.

22m Wave Piercing Catamaran Motor Yacht

An unusual but successful application of the wave piercer design developed by Incat Crowther.

35m Catamaran Airport Rescue Vessel

Two vessels deployed by the Hong Kong Marine department. Capable of a speed response to an airport related incident.

25m Catamaran Wind Farm Support Craft

A Wind Farm Service Vessel with a large, flexible forward cargo deck capable of carrying a 20 foot ISO container either transversely or longitudinally. Features operation-specific bolt-on bow appendage, which enhances operational flexibility.

20m Catamaran Buoy Workboat

A 20m shallow draft utility vessel designed to install and allowing servicing of buoy's with its specially designed A-frame crane.

18m Catamaran Passenger Ferry

An efficient, simple vessel for a repeat customer in Victoria. This is the first passenger ferry to use Incat Crowther's latest evolution of hull form, achieving excellent performance with minimal power.

40m catamaran Passenger Ferry

A new 41-metre catamaran ferry designed for Island Ferries, servicing the busy tourist route between the mainland town of La Ceiba and the Caribbean islands of Utila and Roatan.

60m Monohull Crewboat

Three new ABS-Classed monohull fast support intervention vessels offering efficient and safe transport of cargo, heavy maintenance equipment and personnel.

56m Catamaran Ro-Pax Ferry

Two new aluminium high speed 56m Ro-Pax ferries to service Delma Island from Jebel Dhanna, capable of carrying 194 passengers and 25 vehicles at a service speed of 35knots.

IMAGES

  1. crowther international 23 catamaran motor sailing

    crowther international 23 catamaran

  2. crowther international 23 catamaran Moreton Bay light breeze

    crowther international 23 catamaran

  3. international 23 catamaran

    crowther international 23 catamaran

  4. Image gallery for Crowther International 23

    crowther international 23 catamaran

  5. Image gallery for Crowther International Catamaran Hulls

    crowther international 23 catamaran

  6. Crowther Catamaran

    crowther international 23 catamaran

VIDEO

  1. CATAMARAN DELIVERIES BCSS

  2. [Incat Crowther 40m Catamaran] 「新海駿 Xin Hai Jun」

  3. crowther international 23 catamaran easy trip back from Peel Island

  4. crowther international 23 catamaran motor sailing

  5. Multi 23 Trimaran For Sale

  6. Crowther WindSpeed Catamaran

COMMENTS

  1. International 23' Catamaran Club

    The Lock Crowther designed international 23 is great catamaran of which many have been made. This group was formed for for owners/sailers to share projects and story's of their i23. Private. Only members can see who's in the group and what they post. Visible.

  2. international 23 catamaran

    Lock Crowther designed catamaran called the International 23

  3. Crowther International 23 cat. Specs needed.

    International 23 Mandurah Hi Something to think about. I have a modified Int 23 on a mooring in Mandurah. Bilge keels removed and centre boards fitted and tweaked into a bit of a racer with asymmetric kite, Mylar main etc. Use to race from the Flying Sqn on the Swan

  4. crowther international 23

    The owners states the following specs: Beam 12ft/8ft. draft hulls 1'6" rudders 2'6". mast 33'. main 222 sqf. jib 97 sqf. radial head spinnaker 485 sqf. built weight 1000 lbs. It would be interesting to know when they were built from/to and how many, along with things like the hull dimensions layups that sort of thing.

  5. crowther international 23 catamaran easy trip back from Peel Island

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  6. International 23' Catamaran Club Public Group

    The Lock Crowther designed international 23 is great catamaran of which many have been made. This group was formed for for owners/sailers to share projects and story's of their i23.

  7. Crowther Catamaran boats for sale

    2000 Crowther Catamaran. US$89,900. The Multihull Source | Cataumet, Massachusetts. Request Info. <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price. Boats Group does not guarantee the accuracy of conversion rates and rates may differ than those provided by financial institutions at the time of ...

  8. INTERNATIONAL 23

    Derek Harvey, "Multihulls for Cruising and Racing", International Marine, Camden, Maine, 1991, states that a BN of 1 is generally accepted as the dividing line between so-called slow and fast multihulls. BN = SA^0.5/(Disp. in pounds)^.333 Kelsall Sailing Performance (KSP): Another measure of relative speed potential of a boat. It takes into ...

  9. Crowther boats for sale

    Crowther equips models listed with inboard and outboard-4s drive power options, available with gas and diesel propulsion systems. Famous for their Catamaran, Multi-Hull and Trimaran, the Crowther boats listed generally have a deeper draft and very wide beam, features that make them popular and a favorite for a variety of commercial and ...

  10. 1988 Catamaran Crowther International 23 ft fast and fun

    Great fast fibreglass catamaran roller jib and great mainsail new bimini top and Tohatsu 6 2 stroke engine in excellent condition Boat needs a good paint New trap is being installed ... 1988 Catamaran Crowther International 23 ft fast and fun. $8,500. Listed 3 days ago in Salamander Bay, NSW. Message. Message. Save. Save. Share. About This Vehicle.

  11. Crowther international 23 circa 1985 catamaran

    Crowther International 23 good condition New rigging fitted 1000 new paint new anti fouling racing sails jib and main in serviceable condition All ready to ..., 1323673439

  12. crowther international 23 catamaran at coochiemudlo Island

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  13. International 23 Catamaran Boat For Sale

    Seawind 1000: Sailing Catamaran for Sale. Seawind Seawind 1000. Seawind 10002005 model with major refit near completion.Refit 2022- 23 has included:Vessel has been stripped, recoated and rebuilt internally.Fully... Victoria - Gippsland. $ 296.500 $ 289.000.

  14. Lock Crowther

    Famed muli-hull designer of Australia. Among his most notable designs were the Bucaneer & Kraken series trimarans, Spindrift 45 & Catana 40 cats, as well as a great number of other cruising, racing, charter/commercial and power cats and tris. Lock Crowther built his first boat, a trimaran called BUNYIP, in 1959 while still a teenager. The following year he raced in the Easter regatta at ...

  15. Home Page

    Rottnest Fast Ferries to Launch New Incat Crowther-designed Catamaran. ... Crowther's detailed production design information allowed us to build both locally in the US and overseas via an international tender process. Our partnership delivers the best-value shipbuilding outcome." ... +44 23 8021 1720. The Rectory Stoneham Park Eastleigh SO50 ...

  16. crowther international 23 catamaran motor sailing

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  17. catamaran

    Crowther international 23 circa 1985 catamaran. Multi Hull; 23 ft; Crowther; Crowther International 23' good condition . New rigging fitted ($1000) new paint .new anti fouling .racing sails jib and main in serviceable condition All ready to sail 6 hp outboard moored at Rhyll Phillip island .boat$4000mooring $2500 trailer tandem aluminium ...

  18. reduce catamaran beam

    reduce catamaran beam. Discussion in 'Multihulls' started by brendan gardam, Feb 11, 2020. Page 1 of 3 1 2 3 Next > Joined: Feb 2020 Posts: 367 ... hi everyone. i have purchased an old crowther international 23 which is in great condition. i am toying with the idea of reducing the beam to 10 ft to make it trailerable without having to

  19. Crowther Catamaran Boats For Sale in Australia

    24 M CROWTHER CATAMARAN OPERATED BY ONE OF THE MOST EXPERIENCED PARTY CHARTER COMPANIES IN ... Perth WA, Western Australia. 78' 9". 24.00m. 1985. AU $1,200,000 Plus GST if applicable.

  20. Workboats

    An Incat Crowther 15 Hybrid Catamaran Research Vessel for operation by the Pacific Northwest National Laboratory. ... Tamoya is an Incat Crowther 17 that joins Reef Ranger and Reef Resilience in the Great Barrier Reef Joint Field Management Program fleet. ... +44 23 8021 1720. The Rectory Stoneham Park Eastleigh SO50 9NW United Kingdom. Quick ...

  21. 32m Catamaran Passenger Ferry

    Range. 450nm @ 24 knots. Main Engines. 2 x Caterpillar C32. Installed Power. 2 x 895 kW at 1,800-2,100 rpm. Gearboxes. 2 x Twin Disc MGX6620. Propulsion.

  22. crowther international 23 catamaran Moreton Bay light breeze

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  23. Ships

    65m Catamaran Passenger Ferry. Design Number:IC18138. This Incat Crowther 65 will provide a vital link between Pohang, on mainland Korea and the island of Ulleung-do, where it will be the second largest vessel on the route. It will be the first locally-built high-speed ferry on the route.