buccaneer 24 trimaran plans

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Buccaneer 24 (Crowther)

Buccaneer 24 (Crowther) is a 24 ′ 0 ″ / 7.3 m trimaran sailboat designed by Lock Crowther and built by From Plans starting in 1970.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

Demountable. Main hull beam 3’. Plans were still available in 2009.

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Friday 8 April 2016

Buccaneer 24 trimaran plans, post: buccaneer 24 trimaran plans.

Cruising sailboat evolution: multihulls and other alternatives, Our most recent ruminations on this topic focused on some of the popular dedicated cruising-sailboat des igns that dominated mass-production boatbuilding as the. Boat price guide | boatshop24, Ever wondered what price you should buy or sell at? by checking our boat price guide you'll find current new and used boat values for all boat types and models. Read tmd catalogue, Read tmd catalogue text version. model. dockyard. catalogue july 2012 edition this page is intentionally blank model. dockyard. 17 tremorvah barton, tregolls road.

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A Buccaneer Goes Forth (With a Non-Ballasted Fin Keel)

by Small Tri Guy | Jul 10, 2014 | Self-built Small Trimarans , Small Tri Info - All | 3 comments

This post is a follow up story from the previous one about Patrick McGrath’s Buccaneer 24 trimaran . Once again, he shares a great story with us. But what is most interesting to me is the know-how to perform the modification of the boat that is discussed here.

It’s great stuff. There is always something to learn when it comes to boats. So while reading this is fun it reflects practical knowledge that can only come through experience on the water. Thanks again for sharing this with us Patrick!

Images of the Buccaneer 24 materials list, along with building instructions can be found here . And building plans for the Buccaneer 24 Trimaran can be purchased from OldSailor7 (Patrick’s username) at BoatDesign.net

________________

A Buccaneer Goes Forth by Patrick McGrath

When I built a Buccaneer 24 for the 1971 New York – Bermuda race I decided on a non ballasted fin keel rather than a dagger board. My reasoning was that it would be a KISS decision, giving more room inside and less moving bits to worry about.

Lock Crowther's Buccaneer 24 Trimaran

The race would be all deep sea sailing, with dock tie-ups at each end, so draft didn’t matter. I also reasoned that since water, which for our purposes is not compressible, and weighs over seven hundred times more than air, an immersed foil, on a sail boat would, in effect, be moving at supersonic speed. So I designed a fin keel with a supersonic section, and a half delta plan form.

At small angles of attack the least drag section is a flat plate with minimum thickness. But for strength it would have to be a steel plate, which would be too heavy, and would have a low stall angle. So I chose a 0006 supersonic symmetrical section which was easy to shape and a skeg rudder derived from the AYRS issue79, “Rudder Design for Sailing Craft”.

I was a bit worried about the fin keel for trailing. We had assembled the boat in the light industrial unit where we built it, but how to move it to the water? We found that the keel would fit neatly between the frames of the rented trailer, so we dismantled it and trailed it without hassle down to the Catamaran Club at Ashbridges Bay where I had a mooring. We re-assembled it, raised the mast and rigged it, took some pics and then launched it.

The first club race of the season was the next day. So after putting the cushions and safety gear on board I set sail for Toronto harbour single-handed. I had no out board motor at that time, but with a light, late afternoon breeze it was an easy no-tacking sail into the East entrance to the harbour.

The outer harbour had not yet been built and so I headed for a dock on Toronto island. As I approached the dock, downwind, I dropped the anchor over the stern and watched the end of the anchor line slither over the transom. Bad seamanship. :(

I had neglected to secure the bitter end. Buccaneer was not moving too fast, but nevertheless the bump into the edge of the wooden dock put a nice dent in the soft cedar wood stem-piece.

Next morning, Andy Rosenburg came early with his scuba outfit and quickly recovered the anchor. With two more crew we set sail for the start line outside of the West entrance to Toronto Harbour. To get there we had to traverse the narrow exit channel with the now Westerly wind blowing directly into our faces — and no motor. We tacked and tacked again to get to the start line minutes after the start and found ourselves crossing the line about 200 M after the last boat.

There were about ten assorted multihulls beating up to windward. We looked into the bay and saw the now stiff wind pushing the chop rebounding from the Port Credit sea wall and the dirty air churned up by dozens of dinghy class sailboats sailing and racing. “Blow That” I said, (or words to that effect), “Stand by about”, and we tacked onto a close starboard reach into smoother water and clear air. We soon were in a position to tack back onto Port and a broad reach toward the windward mark.

Andy was a fireman and weighed 240lbs, so he was positioned prone on the Port ama as we raced NW. We passed close to a “Star” sport boat at twice their speed. They hailed us and complained that we were taking their wind and that they were racing. I didn’t reply, just pointed to our race flag fluttering from the flag stay.

We rounded the windward mark about 50M in front of the first multihull leading the pack, which had painfully tacked upwind from the start. As we rounded the buoy we popped our spinnaker and simply trundled back to the start/finish line. We then hove to and waited five minutes before the first of the rest of the fleet came in. The first prize was a half gallon bottle of Scotch, put up by the skipper of the biggest Tri in the race, a 40ft Piver. It was shared by our crew. The skipper of the boat in front of us at the start said they thought we had quit when we turned away after crossing the line so late.

The next day I went out and bought a 6hp, long shaft, outboard motor. :)

All the multis in the club at this time were all either Piver, Wharram or Brown. Soon after this race Crowther Tris began to appear in Toronto harbour. :)

I enjoyed reading this, but couldn’t leave this misconception uncorrected:

> water, which for our purposes is not compressible, and weighs over seven hundred times more than air, an immersed foil, on a sail boat would, in effect, be moving at supersonic speed.

Water is virtually incompressible but supersonic flow is all about compressibility, and the speed of sound in water is many times faster than in air.

I knew someone would pick me up on this one. The words I said were “in effect”. Air is compressible. IE:- elastic. It will move in a rubbery way out of the path of a moving object, up until that object is moving at a speed where the air doesn’t move quick enough. A compression shockwave then appears, producing a sound. The sonic boom. Or the “Snap” of a passing bullet. This is where the term “The Speed Of Sound” eventuated. Water, being incompressible, has to be shouldered out of the way at all speeds. Check the overhead picture of a boat going through the water. Then view a pic of an aerofoil in a supersonic wind tunnel. Both will have the identical shockwave at the leading and trailing edges. I simply reasoned that a supersonic section would be better than any other shape for a leeway resisting foil in water. And I was right.

You may well be right but I’m not convinced by the logic.

All sound is a compression wave. It becomes a shock wave when the source is moving as fast as the wave.

Aerodynamicists treat air as incompressible at subsonic speeds. An object moving through an incompressible fluid creates pressure disturbances that travel at the speed of sound, moving fluid out the way some distance ahead of the object.

A boat’s wake does look like a shock wave, but you’re confusing slow surface waves with the speed that pressure disturbances can travel under water. A boat is traveling faster than it’s bow wave, but much slower than sound waves.

To me, a supersonic section makes a lot of sense for a surface piercing object (such as the main hull of a boat) when you want to minimise the bow wave, but it makes less sense underwater.

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List of Twelve Homebuildables

Here was the original planned group—listed alphabetically:

• Buccaneer 24
• Cross 18   ♣
• Discovery 20   ♣
• F22   ♥
• L7   ♥
• Scarab 22   ♥
• Seaclipper 20   ♣
• Strike 18   ♣
• Tremolino   ♥
• Trikala 19   ♣
• W17   ♣  (and also the larger Raid boat ... the W19)

Although it was originally planned to write up a description of these 12 homebuildables for this article, basic thoughts on many of these boats have since been presented in two reports. One is the free Review of Nine Small Folding Day Trimarans that includes the six homebuildables marked with a  ♣ after the name. Four of the others, marked with a  ♥ , are covered in the more elaborate $9.00  Report on Small Trimarans also available through this website.

The elderly Buccaneer 24 design is already covered to some degree in my article The Buccaneer 24 Trimaran . Latest information on the W22, for which plans are scheduled to be ready by Spring 2011, can now be found through The W22 Trimaran Main Page.

The other designs like Dudley Dix's ThreeFold, the Typhoon and Tango23 etc have not been totally forgotten, but will be included in a new report, scheduled after the completion of the W22 plans, so one will need to be patient for this.

"New articles, comments and references will be added periodically as new questions are answered and other info comes in relative to this subject, so you're invited to revisit and participate." —webmaster

"See the Copyright Information & Legal Disclaimer page for copyright info and use of ANY part of this text or article"

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M-Series Trimaran M80 MKII

Wayne Barrett has been building boats for 50 years, many of them world renowned. His latest venture is a DIY trimaran kit that embodies his half-century of expertise and celebrates “the joy of building and sailing your own creation”.

Famed in multihull circles and the creator of high profile vessels such as ‘Trilogy’ and ‘Indian Chief’ designed by Tony Grainger, and ‘Traveller’, the 50-foot tri designed by Dick Newick, Barrett describes himself as “a little guy designing boats on the kitchen table in an apartment on the Gold Coast, with a nice view over the lake”.

He has built some “100 or so boats” over the years and his passion and prowess have inspired him to create the M80 trimaran, an 8-metre vessel designed with the home builder in mind; those with limited time or space, and some basic experience with hand tools.

The versatile M80 can be specced for cruising or racing and the larger 9-metre design will have a range enough to sail across the Atlantic.

“In 2021, I’m planning to sail the 8-metre boat up to The Whitsundays as a promotional exercise to showcase the vessel. It’s very manageable for single-handed sailing.”

The concept arose from Barrett’s belief that sailing should be within everybody’s reach.

“I’ve built quite a few complicated, high-performance multihulls over the years and I’m aware they consume time that’s way beyond what an amateur could devote to a build. I used the flat panel concept, adapted to tri design and put it out there for amateur or professional builders.

“A friend of mine I’ve been sailing with for 40 years needed a new modern Buccaneer 24, a plywood 24-foot Crowther around in 1966. I’ve built a few of them, and a B33, B40 and a Spindrift 37. I thought about it for a year or so, then did something about it.

The spiritual successor to the Crowther Buccaneer 24, the 24-ft ‘Mojo’, was originally designed with a central cockpit, a double bunk down aft and a galley and head forward, which I thought was a great concept. But I scrapped that idea and went with a conventional aft cockpit.”

The first boat, in Brazil, set sail just over three years ago and since then, Barrett has sold plans around the world.

“A mate of mine from Geelong, Andrew Johnson, is building one at Lightwave Yachts at Coomera on the Gold Coast with the guidance of Roger Overell. It’s well into the final stages and will be used for cruising. It’s made totally from carbon, so it’s light and strong.

“There’s another one being built in France, a 6-metre design being built in Melbourne and a 9-metre design close to completion in The Netherlands. I’ve sold 9-metre plans to Germany and one in Sydney, revised to be all flat panel, foam and round bilge, with aesthetics to suit that owner.”

The main attributes of the design that have such broad appeal are its simplicity and economical package.

“Initially the concept was built around plywood, which has been a common material for 100 years and most people are familiar with it,” explained Barrett. “The benefit of ply is that a guy can build it in his own shed, over time. But other than the 9-metre in The Netherlands, people are all keen on the foam and epoxy.

“Foam and epoxy is a bit more costly, but comparing the total price is attractive for an amateur builder. It can be built from CNC cut panels in a fraction of the time compared to some other options, alternatively you can build it from our easy to follow plan set for DuraKore, DuFlex or foam core kits.”

Barrett has worked with ATL Composites for the past 25 years on numerous projects, including the 9.2-metre ‘Trilogy’, which held the Aust Championship title for around 10 years, ‘Traveller’ and the 13-metre Gary Lidgard-designed cat ‘Saloon Bar’.

“I also built a 7.5-metre caravan which appeared on the ABC program, ‘New Inventors’ five or so years ago,” continued Barrett. “I used ATL Composites’ products, including foam and resins.

“ATL spent a lot of time scanning the surface of the moulds so we could get an accurate pattern for the shapes of the foam core. I built five of them, all custom designed and built, all traveling the country. It was a fantastic looking thing!

“ATL has always been fantastic to me, in their general support, timely supply of goods, always bending over backwards to help.”

For the M80 in build at Lightwave Yachts, the main shell structure, fore and side decks, and cabin sides were built with DuFLEX/foam panels cored with Divinycell H80 structural foam in a variety of thicknesses and reinforced with double bias E-Fibreglass skins.

The cabin top and floats were strip planked with DuFLEX H80 strips with a 450grm uni-directional on either side to achieve the compound shapes and then reinforced with additional laminates to complete the structure.

The project incorporated carbon fibre and E-fibreglass reinforcement, supplied by ATL, to provide stiffness and to achieve the weight specification for the project.

High performance KINETIX R246TX, a thixotropic epoxy, was used to laminate these reinforcements and WEST SYSTEM R105 and H206 was used for all bonding and coving, combined with WEST SYSTEM 413 Microfibre Blend and 411 Microsphere Blend powder modifiers to alter the consistency for the specific applications.

The M80 was faired with ATL’s unique Technifill XP which is a pre-filled epoxy fairing compound that is ultra lightweight and very easy to sand.

Getting started is straightforward, according to Barrett. “People buy the plans, complete with DXF files and they can have all the flat components cut out with CNC or jigsaw by hand”.

“If you have plenty of time, it’s cheap. An average handyman or woman, with basic experience with hand tools could put it together in their garage or workshop. In The Netherlands it’s being assembled under a tent to keep rain and snow out. Where there’s a will, there’s a way to boat the world over.”

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Buccaneer 28 Trimaran plans.

Discussion in ' Multihulls ' started by oldsailor7 , Apr 17, 2010 .

bruceb Senior Member

Bigger - and Better That must be a very special Buc, I hope it goes to a good home. I can certainly see the advantage of the extra space on board, and it looks "better" than designed as a 33. Thanks for sharing the details. Bruce  

wiseolemule Junior Member

Hi Bruce, Have read the threads about the Buc*8 about people wanting a set of plans. I ran across this and I'm sure others have seen it to http://trimaranproject.blogspot.com.au/ for Buc*8 plans. Click on that link and you will see Crowther's cover page and this is the link that has the PDF's that you can download. https://www.mediafire.com/folder/aaltgc3owsb1u//Buccaneer 28 I hope this helps, the PDF's are a bit faded and have not studied them enough to know they are sufficient to build with. I bought a set of Buc 24 plans from OldSailor7 but have decided she is too small for my purpose. Buc*8 seems more likely to fit my requirements. If I decide It is the one I need I too will be in the market for a full set of plans! The B-24 plans are For Sale if anyone is interested. Cheers, Ed  

oldsailor Junior Member

We, that is my company Canadian Multihull Services, built the first B28, plus another for a client. Lock Crowther was in Toronto for the World Multihull Symposium, and together with Logan Apperley and my wife Jillian we launched the first B28 and literally sailed it to the starting line of its first race. This was an overnight race, on a triangular course on Lake Ontario, an inland sea. There were about 60 boats of all types in the race, which was put on by the CYRA. We were the first boat to finish and naturally we were first in the multihull class. The four of us eat and slept on the boat taking regular watches during the night. Lock was very pleased with his design. Jillian and I went on racing and cruising the B28 for another two years with great pleasure. It was the best boat I have ever owned. It broke my heart to sell her, but we had to as we were moving to Australia. I know that the B28 plans are available in PDF form, but I was not able to produce a useable set of plans from them. Perhaps I was doing something wrong, but I would love to hear if someone has actually produced a full size set of paper B28 plans that could be used to build the boat.  

Size matters? Wom- and any one else still following . I have "almost" finished rebuilding my "new" Buc 33 that I purchased over a year ago. (OS and friends built it originally around 1976? and it was ready for some TLC- I hope I have done it justice). I was really looking for a Buc 28, and could not find one here in the USA, and purchased the 33, knowing it would need a LOT of work. It has been a total rebuild, and I hope (and think) it will be worth the effort, but a 28 would still be my first choice. Unless you are planing on extended cruising, a 28 sized boat just makes more sense for most uses. Just an opinion, but a slightly updated Buc 28 would seem to be a very capable and practical size and a good design. B  

Angélique aka Angel (only by name)

bruceb said: ↑ Wom- and any one else still following Click to expand...

Marmoset Senior Member

Kurt Hughes has a few designs with staggered beams like that, it's a smart way to go! Can't wait to see all the details on that 33, hope you took lots of pics. Barry  

Improvments? I have lots of pics, and more to come. Once I am launched, I will take some time and organize and share them. Right now I am up to my ears in last miniute details. The "problem" with using sliders for the Bucs, is basic- Bucs are all too wide. A 24 is 19' beam so the "half" beams are too wide to be legal to trailer, or they have to be very heavy to take the cantilever loads. I am not saying it couldn't work, but the engineering and construction would be a lot more complex than a basic Buc. B  

Neonhelm Junior Member

Angélique said: ↑ Saw this Astus 24 (sort of translation ) where the port and starboard beams are just next to each other and can slide along each other to to slide the amas in for berthing and trailering.... (see videos in the original link) Click to expand...

Yeah your right! 4+4=8 add sleeves and containment and you just lost a foot of boat, twice! Barry  

redreuben redreuben

Start an Astus thread  

redreuben said: ↑ Start an Astus thread Click to expand...

outside the box Previous Member

Good news Friday We finally have the B28 plans good enough to ship printed sets. All available info is on fb page until I update plans page on website https://m.facebook.com/profile.php?id=212821925457790&_rdr Have a great weekend Regards Brooke and team Ezifold bruceb said: ↑ Wom- and any one else still following . I have "almost" finished rebuilding my "new" Buc 33 that I purchased over a year ago. (OS and friends built it originally around 1976? and it was ready for some TLC- I hope I have done it justice). I was really looking for a Buc 28, and could not find one here in the USA, and purchased the 33, knowing it would need a LOT of work. It has been a total rebuild, and I hope (and think) it will be worth the effort, but a 28 would still be my first choice. Unless you are planing on extended cruising, a 28 sized boat just makes more sense for most uses. Just an opinion, but a slightly updated Buc 28 would seem to be a very capable and practical size and a good design. B Click to expand...

Attached Files:

11377182_574599466016676_9116898694351547923_n.jpg.

To all you Guys & Gals at Ezifold, Congrats on bringing the B28 back to life. Now, at last, all who wish to can build this standout trimaran with complete freedom. I can't exaggerate about how good this boat is for both cruising and racing. It needs no modifying, except perhaps adding a prodder instead of a spinnaker pole. The outboard is mounted on the transom with a stock lifting mount, as the spade rudder is underslung. The pivoting centerboard is a joy to use as it is controlled from the cockpit. A furling forestay with a plastic hoisting slide is recommended. Slab reefing of the main sail is also better than roller furling we found. The B28 is really good in handling rough water, but make sure you have very watertight hatches on the floats.  

eladio trimaran...

Greetings friends!. I read completely this thread already has long forum. First of all, congratulate those who got their contributions to these plans become available. A "oldsailor", "Buzzman", "2far2drive", "is stalion", "Gary Baigent" and many others, Maximum greetings, as they gave life to this new boat for people who did not really know him. After exchanging emails with a gentleman from Canada (thomD), who told me to go for a smaller boat, I began to change my idea into a boat that could carry in a trailer, and off-season navigation, rest on my backyard. In this way to navigate soon, I buy a monohull. It is an excellent German Freers design, built in Could molded system... But I want a trimaran, and this is the time to build one. I can assure you exactly what I want, but I find it difficult to get an actual design that meets these desires, and end up thinking that this old Bucanner 28 could be right. The list of things I want seems very simple, but difficult to achieve in a single design. 1-Light and very fast boat. (Not race) 2-Minimalist interior. 3- No complicated folding systems, simple aluminum beams are fine. 4-Some capacity for ocean navigation, although most will be coastal. 5-simplicity of construction 6-Boat light. 7-Daggerboard vertical slider, and kick up rudder. I would like to consult here, if this boat is fast, assuming that will be also equipped with good sails. And if it is justified today to build such an old design. (I could not find one) And as would do an update of the appendices dagger board and rudder .. (Maybe Gary Baigent, wants to contribute to a design) Cheers Eladio  

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kaamaman Junior Member

Just saw this on Craig's List: http://sarasota.craigslist.org/boa/5075237200.html Wish I lived closer!  

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