Boats for Sale & Yachts

Searunner trimaran for sale $26.500 price new - 2022.

Searunner Trimaran for sale at just $26,500 USD. It has a high-efficiency diesel engine. Searunner Trimaran boats only the underwater ship should be treated with antifouling by the new owner. The rest of the fuselage was stripped down to the wood and a multi-layer two-component paint was applied. Searunner Trimaran has a total of 4 cabins as 2 cabins with a bed for 2 people and 2 cabins with a bed for one person and 3 WCs and 4 bathrooms. Captain cockpit and control console with an ergonomic design. The boat is designed to provide maximum safety, performance, and comfort under harsh weather conditions.

searunner trimaran

Searunner Trimaran Boats Review and Specs

Table of Contents

Molly Brown is a custom Jim brown trimaran design, epoxy/glass over plywood construction. A standard brown Searunner catamaran 37 layouts, with the head and vanity forward, double and single berths in the wings; a dinette aft, with seating for six that converts to a queen berth; a galley and nav areas adjacent. An affordable favorite with multi-hull cruisers and charters alike. Motivated seller will entertain offers including trades, in whole or in part: real estate, pusher RV, or?

Boats for Sale & Yachts Searunner Trimaran for Sale $26.500 Price New - 2022 Sailboats for Sale

hewescraft searunner, hewescraft searunner 210, searunner trimarans, searunner trimarans for sale

Website: https://www.searunner.com/

Contact Information Searunner Trimaran for sale  advert. The interested party would like to get an idea of ​​the overall condition of the boat on site.

YouTube video

Searunner Trimaran Boats for Sale Craigslist & Searunner Trimaran Specs & Pictures

Incoming search terms.

  • https://www luxuryatch com/1985-custom-searunner-trimaran/

Related posts:

  • Searunner 37 Trimaran boats for Sale **Best 2020
  • Custom Searunner Trimaran 2008
  • Searunner 40 Trimaran 1979 for Sale $74,000 New 2022
  • Brown Searunner 1986

Custom Searunner Trimaran price is $29.500.

Mazatlan Marine Center SA de CV is manufacturer of Custom Searunner Trimaran.

25 Knots can go this Custom Searunner Trimaran.

Yes, you can use daily to Custom Searunner Trimaran.

Search it from Luxuryatch.com. You will find the best price of Custom Searunner Trimaran.

This entry was posted filed under Sailboats for Sale . You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

Previous | Next | Random Site Multihull Web Ring

  • Skip to primary navigation
  • Skip to main content

Ocean People

Bringing the second golden age of sail

Spice, SeaRunner 37 Cruising Trimaran

Instead of going on to college as all his friends did, Tim graduated a year early from high school and spent his senior year building a 25-foot SeaRunner trimaran designed by renowned multihull designer Jim Brown, in a friend’s driveway in Palo Alto, California. When his friends were having their graduation night party, Tim was 20 miles off Point Sur (near Monterey) headed south around the world in that little boat, with $100 in his pocket.

He soon found out that both the boat and the amount of money were way too small! Tim stopped in Santa Barbara, sold the 25-footer, and built a 37-foot version of the same boat. This was a SeaRunner 37 trimaran designed by the renowned multihull designer Jim Brown, and named Spice . She had big comfortable DRY bunks, a nice galley (kitchen to you non-boaties), and even a SHOWER!

searunner trimaran

He had Spice for 6 years, and sailed her to the Marquesas (near Tahiti) in 1976, then spent a year cruising the Hawaiian Islands in 1977 before settling down in Hawaii (to build a bigger boat) and selling her.

There’s an interesting story about the following photograph that Tim took of Spice while she was in the Marquesas:

First, cruiser’s parties are always held on the boat that has the most deck area. Spice wasn’t always the longest boat in the harbor, but at 22 feet wide, she had more deck area than most 60-footers, AND had the biggest “boom tent” for shade in the whole anchorage, so she had more than her fair share of parties.

Second, Tim took this photo with a Nikonos V waterproof camera: no light meter, no through-the-lens focusing, and none of the other modern camera features that make for great photos these days. Luck.

Third, Tim had already had three rum punches when he climbed to the top of the 50-foot mast where he took this photo, with no safety harness on (hey, we’re all young and bulletproof once!). Again, Luck.

searunner trimaran

The life sounds perfect, right? What Tim found, though, was that he had to stop every six months or so when he ran out of money and pick up work to replenish the cruising kitty. This meant getting a job, and living aboard in a stinky polluted harbor near a big city, and was never much fun.

Tim had learned to catch fish aboard Spice in the Marquesas, and that seemed like a good way to make money without having to stop and get a job. But Spice had a fault: with no fish hold, no refrigeration, no ice-maker, and nowhere to buy ice out in the small islands he loved visiting, Spice had to fish close to the harbor and get the fish back within an hour or so, before they started to spoil.

So Tim started dreaming of a trimaran that was designed from the ground up to be a fishing boat; with refrigeration, bait wells, and all the “stuff” that goes with commercial fishing boats. His idea was to keep cruising and feed people along the way; earning a living at the same time.

He couldn’t find anyone with a practical sailing fishing boat design in the size and type of vessel he wanted, so ended up designing his own 56-foot sailing fishing trimaran, Tropic Bird , then building her himself in 1977-1978.

You will find that story on the Tropic Bird page.

searunner trimarans for sale

Searunner Trimarans For Sale Reduced to $30,000! 2023

Photo of author

Searunner Trimarans for sale are designed and manufactured by expert hands. Its balance and acceleration are outstanding. This Searunner Trimaran for Sale is a good companion for both leisure trips and sailing for speed.

Searunner Trimarans For Sale

Designed by marine enthusiast Jim Brown, Searunner Trimarans for Sale features a full three hull designs. Three hulls or buoys are connected by cross beams to form a stable and wide platform for sailing. The main body, or central body, is built by dividing my cabin, galley, and lodgings.

The Searunner Trimaran for sale is built using composite materials such as fiberglass and carbon fiber. The aim of this building technique is to be a light but sturdy yacht despite adverse sea conditions. The sailing area is wide. Maneuverability and speed performance are highly appreciated.

One of the things we love most about the Searunner Trimarans for sale is that it’s a performance beast. The Trimaran’s multiple hulls distribute the ship’s weight efficiently, reducing drag and enhancing stability. Thanks to its design, it fascinates sailors with its speed and balance.

searunner trimarans for sale

Searunner Trimaran Boats Review and Specs

  • Price: $30.000
  • Manufacturer: Mazatlan Marine Center SA de CV

Contact Information  Searunner Trimaran 37 for sale  advert. The interested party would like to get an idea of ​​the overall condition of the boat on site. Craigslist Searunner Trimaran For Sale .

Please Add a comment before the calling of  Searunner Boats , we will inform your email address to the owner of the boats. They will reach you by mail or phone. / Searunner Trimaran Modifications.

Searunner Trimaran Boats for Sale Craigslist & Searunner Trimaran Specs & Pictures

listed in this advert / Searunner Trimaran Construction.

Explore full detailed information & find  used Searunner Trimaran boats for sale near me. ®️ Theboatyacht.com Leader Platform For Sale Boats & Yachts. For more related  Searunner Boats , please check below. We have a totally of 89,000 models  Searunner Boats  on our website / Searunner Trimaran Plans Australia.

Custom Searunner Trimaran price is $30,000.

Mazatlan Marine Center SA de CV is manufacturer of Custom Searunner Trimaran.

25 Knots can go this Custom Searunner Trimaran.

Other Resources

  • https://www.searunner.com/
  • https://en.m.wikipedia.org/wiki/Searunner_31
You may also like these boats and yachts for sale:
  • Chesapeake Bay Deadrise Boats For Sale
  • Seadoo Speedster for Sale
  • Davis Rock Harbor 25 For Sale
  • MetroShip 48 Houseboats For Sale
  • Sturdee Boats For Sale
  • Hells Bay Boats For Sale
  • Yachts For Sale

Save my name, email, and website in this browser for the next time I comment.

[email protected]

If you come across advertisements that have been sold, please inform us! The Boat Yacht Sales Managers. United States, California State, Los Angeles 90001. Boat Marketplace Group Network. All Yachts and Boats For Sale , Specs, Reviews, Price, Craigslists. Copyright © 2024. All Rights Reserved.

searunner trimaran

ProBoat.com

Professional BoatBuilder Magazine

Folding multihulls.

By John Marples , Jan 28, 2023

Folding multihulls and their beam-reduction strategies.

Folding Multihulls

A Farrier 33R trimaran with amas folded and secured on a road-legal trailer exem- plifies the advantages of adjustable- beam multihulls, which are easy to trans- port and store out of the water.

“I’ll be surprised if you can find space in the harbor for that thing,” I heard him say as my new 37 ‘ (11.3m) trimaran was about to be launched. I hadn’t given it much thought, but now this legitimate question was raised, and where to moor was the next issue at hand. Space, particularly width of a slip, becomes the limiting requirement. But then, space also is one of the attractive features of multihulls—deck space to move around on, free from the confines of the cockpit.

Step aboard any multihull and it is obvious how much real estate they offer. Even small models seem expansive. The beam of the typical catamaran is half its length, and trimarans are even wider, sometimes as wide as they are long. Aside from increasing space, beam also boosts stability without adding ballast. The early Pacific Islanders created these form-stable craft for fishing and interisland commerce and voyaging where natural island harbors were few, so the boats had to be light enough for crew to carry them up the beach. Today’s modern multihulls are still lighter than contemporary monohulls, but the larger ones preclude the option of dry sailing them from the beach. They require more marina space than monohulls, and the limited number of slips to accommodate them can be a problem. As someone once put to me, “Multihulls have a poor ‘stacking factor.’”

With catamarans and trimarans becoming more popular, they demand mooring solutions. Some marinas offer shallow-water slips to multihulls, typically at the inboard ends of docks, next to the seawall, because multihulls either have shallow keels or retractable boards. Some marinas also designate the end ties as multihull slips in areas not used for transients. Even though these boats protrude farther into the channel than monohulls, the extra space their beam occupies is relatively small. With multihulls crowding waiting lists for marina slips, builders were prompted to consider folding systems to “improve their stacking factor.”

Without ballast, smaller multihulls up to about 30 ‘ (9.1m) can be dry-stored on a trailer, and most launch ramps easily accommodate over-width boats. If the boat’s beam can be reduced to the legal highway width of 8.5 ‘ (2.6m), the owner can store the boat at home. Today, folding trimarans and catamarans are common sights on trailers in storage yards and backyards. Various folding systems have evolved to support this need, especially for the backyard builder. Some beam-reduction systems allow the boats to be folded and stored in the water in conventional-size marina slips, while other systems facilitate efficient storage or provide street-legal trailering.

Folding Systems

Basic folding systems are separated into several categories:

  • take-apart akas, the simplest beam-reduction method
  • telescoping akas (sliding beams)
  • simple horizontal hinge
  • complex horizontal hinge systems
  • vertical hinges (swing wing)
  • complex swing wing

The following overview of folding systems illustrates how these mechanisms work. It is not intended to be an exhaustive listing of available folding designs. I’ll address two-hull boats (catamarans and proas) first, followed by trimarans. Each type has its challenges and advantages. All are separated into two more categories: transportable boats and trailerable boats. The characteristic distinguishing between them is the time and effort required to launch, starting from an on-the-trailer folded condition. Trailerable implies the possibility of daily launching, requiring less than an hour from trailering to sailing. Transportable denotes a road-legal trailer package but with a longer assembly time to sail away. It might even take more than one trailer load, and considerable assembly time. Legal width in this category could extend to 10 ‘ (3m) wide if OVERSIZE LOAD signs are used (consult local laws). Transportable boats usually require seasonal transport with storage in the water during sailing season and dry storage in the winter. Both categories benefit from the ability to “go to weather at 65 mph” to reach any suitable launching site, even hundreds of miles from home. This opens the possible sailing venue to any water body with a launch ramp and road access, and some trailerable and transportable boats can be delivered anywhere in the world in standard shipping containers.

Catamarans and Proas

searunner trimaran

The WindRider 17′ trima- ran’s telescoping tubular akas are secured with pins

Hobie Cats and other beach cats are familiar sights around lakes, beaches, and harbors. They are usually built to 8 ‘ (2.4m) beam and do not need folding systems. The 19 ‘ (5.8m) Tornado class catamaran at 10 ‘ wide uses a side tilt-up trailer to reduce beam. Larger catamarans needing folding systems have greater challenges than trimarans of the same length, for a few reasons: The hulls are normally bigger (and heavier) than amas for the same length trimaran; the mast is stepped on the center of an aka, midway between the hulls, which means the aka must be extra strong; and there is no easy means of supporting the hulls while the beam is being expanded to the sailing position, requiring that the trailer have an expanding-beam function. As a result, folding systems are less common on cats and are usually of three types:

  • folding akas along the centerline or to a center pod
  • telescoping akas
  • take-apart akas

Folding Multihulls

On this Wharram cat, the akas are securely lashed into “deck alleys.”

Designers have used telescoping akas, but production boats generally avoid the associated complexity and cost. The mechanically straightforward take-apart feature has successfully been used by many boats, like the 27 ‘ (8.2m) Stiletto Cat and others. Generally, the assembly of these boats takes some time and muscle, which relegates them to the transportable category. Stiletto Cat advertising suggests a four-hour setup time, but in reality, it is much longer. All the James Wharram–designed catamarans up to 63 ‘ (19.2m) are held together with rope lashings and can be dismantled for transport. The required time and effort are generally proportional to the length of the boat.

Note that the Gougeon 32 ‘ (9.7m) sailing catamaran is unique, at 8 ‘ wide, without folding capability but with a water ballast system to make up for the lack of form stability.

The large main hull of a typical smaller trimaran offers a larger interior space than a comparably sized catama ran, a deep footwell in the cockpit for comfortable seating, and a folding system for trailering with the amas connected to a well-supported main hull. In addition, the mast is stepped on the main hull, with the headstay attached to the bow, not to the akas.

Trailerable trimarans come in all sizes to about 32 ‘ long, with transportable designs somewhat longer. The latter types tend to have larger interior spaces and less complex connectives. To a certain extent, manufacturers were willing to add cost to the folding system to reduce setup time. Folding capability on or off the water also adds to the design challenges.

Take-Apart Aka Systems

This is the least expensive method and easiest to achieve for the home builder or the manufacturer. The akas may be built-up wood box beams or tubular metal. Each beam is secured to the hulls by through-bolts, bolted straps, plug-in sockets, or lashings. Tubular aluminum beams are the lightest but most expensive. Regardless of attachment method, the hulls must be supported in their respective positions for the akas to be installed. In small vessels, this can be an abbreviated procedure, but larger vessels will require a special trailer to hold the disconnected amas while on the road.

Folding Multihulls

The Chesapeake Light Craft 15′ single outrigger canoe akas lash into saddles on both hulls.

Telescoping Aka Systems

The telescoping option is limited to boats where the total stack-up width and length dimensions of the hulls and fully retracted akas do not exceed the legal road limits. The WindRider 17 is a good example. The boat is supported on “high bars” on the trailer, leaving the amas free to be moved in or out. The simplicity of the akas and trailer-support system reduces cost and launching time.

In larger vessels, this system has been applied to reduce width for storage in marina slips. For these boats, the sliding system is large and complex, usually requiring some sort of power to make the telescope slide. Because the sliding mechanism requires a small clearance between the sliding members, the akas will move slightly during sailing, which is difficult to avoid.

Folding Multihulls

The 1970s-vintage Telstar 26 features a simple hinge-down system with a bolted con- nection on deck and a bolted strut below.

Simple Horizontal Hinge Systems

Early trailerable trimaran designs often incorporated a simple hinged beam-reduction system to fold both sides down. Boats to about 25 ‘ (7.6m) with a 16 ‘ (4.9m) beam could be made to fold to 8 ‘ . At the ama end, lifting the hull, sometimes with attached wing deck, could require substantial muscle or a mechanical lift. Even for smaller boats this task may be beyond one person’s capability. Normally, bolts and plates between the members secure the hull for sailing. On the Searunner 25 and Constant Camber 26 (7.9m), double-hinged tubes are bolted to tangs on the main hull.

Folding Multihulls

The Searunner 25 trimaran has a hinge mechanism on its metal-tube A-frame akas that secures with bolts at both ends.

Commonly, simple hinge systems require that the main hull be positioned rather high on the trailer so the amas clear the trailer wheels beneath. A disadvantage is that the trailer must be submerged more deeply than usual for the boat to float off. Compared to the Telstar system, the Searunner 25 offered some improvement by positioning the hinge point at the top of the cabinside, raising the folded ama slightly.

Complex Aka Hinge Systems

A complex system for folding multihulls, much like a garage door lift linkage, was developed and patented by Ian Farrier for his trailerable trimaran designs. It allows one person to fold or unfold the boat while it’s afloat. Before launching, the mast is stepped and secured with lower stays. Note that folded storage in the water for long periods is not practical because the immersed ama’s topsides will gather marine fouling. In addition, the arrangement of the support linkage arms has a very shallow angle with the aka, causing them to be highly stressed, which adds significant weight and cost.

Folding Multihulls

Unfolding it requires help from friends.

A complex folding system I developed has only four attachment bolts and a wide-angle strut brace. It is very light but requires folding prior to launching. It relies on a simple roller dolly on a beam attached to the trailer to support the ama during folding and unfolding.

Swing-Wing Systems

In-water storage of folding trimarans is generally limited to swing-wing designs, where the hulls all float on their respective waterlines, either folded or unfolded. Many variations have been used in production boats, and among the most successful is the Quorning-designed Dragonfly. It has hinged arms supported by a “waterstay”— a diagonal cable under the arm to counteract cantilever aka loads. The outer end of the arm, on the ama deck, pivots on a single pin. The waterstay becomes slack when the boat is folded, leaving only the hinge to support the ama in the folded configuration. I’ve seen one folded boat that was damaged while moored at the dock in strong harbor waves when the ama climbed onto the dock. Swing-wing designs stored in the water must provide strong vertical support for the ama in the folded condition

Folding Multihulls

A swing-wing aka system on the Borg Quorning–designed Dragonfly 32 is further supported by a waterstay when rigged for sailing. The akas can be adjusted in and out while in the water and for storage at the dock.

The main challenge of the swing-wing system is to get all the pivot axes parallel because they must rotate about 90° without binding. If there is any depth to the structure, this accuracy is critical, as the pins or pivot axles could be quite long, so even a small inaccuracy will make the system difficult to assemble, let alone pivot smoothly.

Folding Multihulls with Flat Swing-Wing Akas

The most basic swing-wing system is the flat aka configuration developed by Jim Brown. He avoided the need for perfect parallel alignment of all hinge axes because the beams are not very thick, and the pivot-pin holes can have additional clearance. For the swing system to operate without binding, spacing of the pivot points must be identical on all the swing arms. The system’s downside is strength, because the aka must support all the heeling loads in a relatively narrow beam. For some boats, a waterstay may need to be added to increase cantilever strength and reduce deflections when sailing.

Folding Multihulls

The Seaclipper 16 flat swing- wing akas are made from common dimensional lumber and pivot using steel bolts.

A logical improvement in strength for swing arms is to add a truss, with triangulated strength that will easily bear all the heeling loads from the ama. Here again, it is essential that pivot axes be in perfect alignment to avoid binding. To my eye, open trusses in sleek yachts are never beautiful, but they offer higher strength for lower weight.

Complex Swing-Wing Systems

If the akas are not flat along their full length, it is more difficult to achieve a smoothly pivoting system. My latest boat, Syzygy (pronounced, sis-a-gee), is a case in point. Flat akas offer little variation in styling—flat is flat. To add underwing clearance and more attractive aesthetics, many designers favor the arched aka. This configuration allows the aka to approach the ama hull from above and connect through the deck for more usable immersion of the ama buoyancy, and to keep the aka above the wavetops.

This system has arched akas with an upward angle (dihedral) as they extend from the main hull and descend with a smooth curve onto the ama deck. The pivot axis must also be inclined, normal to the surface, to allow it to pivot. To make life simple, the vertical centerline of the ama is inclined inboard at the top by the same amount, which aligns all the pivot axes with the ama vertical centerline. If the beam is level fore-and-aft, when the ama is folded inboard, it is positioned rather low, due to the arch. To compensate, the akas must be given a negative angle of attack to make the folded ama arrive in the same position as a simple flat aka system. It’s a good challenge for any boatbuilder to get it right and a good use of a digital level. The angles in Syzygy were 8° dihedral, and a nega tive 5° angle of attack. The aka pivot surfaces must be perfectly parallel on both ends—at the inboard aka pivots and the ama deck pivot tables.

Folding Multihulls

Jan Gougeon designed and built strings, a 40′ swing-wing catamaran with carbon- tubular-truss swing akas built over foam mandrels.

A late iteration of the Telstar 26 became the Telstar 28 with a vertical-axis swing-wing system. This production boat is no longer manufactured but was unique for its faired wing and attempt to hide the folding system from view. It also featured an electric linear drive to fold/unfold the heavy akas.

For transporting folding multihulls on the highway, road trailers must have some specific attributes to properly support the hulls. Most models use transverse cradle supports under the hull at major interior bulkhead positions. It is important to install bow guides on the trailer to get the hull to settle in exactly the right place when retrieved from the water. Rollers beneath the hull are not recommended, as they tend to distort it and potentially cause damage. The amas require enough support so the folding mechanism is not carrying the load when being towed.

For swing-wing boats, there is a significant change in the center of gravity between folded to unfolded configurations. Normally, the amas swing back when folded and swing forward for the sailing position. If the trailer has the proper tongue weight for towing on the hitch with the boat folded, the weight will increase when unfolded. For trailers with telescoping tongues, tongue design must accomodate that weight; otherwise, the extended tongue may bend severely during launching or retrieval.

Homebuilt wooden trailers are popular for these specialized boats, and some designers provide plans for them. Without much metal in them, they will probably float, which sometimes leads to difficulty at launching. Adding some steel channel to the bunks can solve that. However, floating is not an undesirable feature if a trailer floats level but is submerged enough to maneuver the hull into the bunks, and the hull settles into the right place automatically. Floating trailers also never run off the end of the ramp.

Conclusions

There’s truth in the humorous claim that “the new family yacht has to look good behind your SUV.” But while many of the latest small boats are daysailers, folding multihulls have expanded the trailerable and transportable boat size to include those with weekend cruising capability, up to about 32 ‘ . As we’ve seen, those essential folding or retraction mechanisms are not simple and must be carefully designed and engineered, even by the home builder. But for owners of these boats, seasonal storage and slip availability are no longer problems. And the overall reduction in total cost can bring owning a boat within reach for many more people. What’s not to like about that?

About the Author: John Marples has designed, built, and rigged many sail- ing vessels. His portfolio includes doz- ens of wood-epoxy composite sailing and power multihulls to 110′ (33.5m). He operates Marples Marine , a multihull design and engineering firm in Penobscot, Maine

Dieter Loibner | Professional BoatBuilder Magazine

Nomenclature

Multihull designers have developed some useful, specific names for components, mostly derived from the Pacific Islander language.

Aka (ah-kah) refers to the crossbeam structure of any multihull. Designers used to call them “cross-beams,” but writing that on hand-drawn plans took up too much space and time, so this shorter Polynesian name became the standard.

Ama (ah-mah) is the Polynesian name for the outer hull of a trimaran or proa. They were formerly named “floats” or “outer hulls” (never pontoons), but again, ama is shorter.

Vaka (vah-kah) is the Polynesian name for the main (largest) hull of a trimaran or proa. Since it can be confused with the other names and is not very descriptive, most designers have opted for the term main hull.

Waterstay is a diagonal stay, metal or synthetic rope, below the aka, between the main hull near the waterline and aka near its outboard end. This stay counteracts the upward load from ama buoyancy when the ama is immersed.

—John Marples

The Crossbeam (Aka) Structure 

T he essential function of any crossbeam (aka) system on a multihull is to structurally connect the hulls in a way that resists all the forces generated when sailing. Heeling forces from lift on the sails must be transferred to the leeward hull by the aka structure. The forces on the akas are complex, composed of cantilever bending due to heeling loads, twisting of the structural platform, and horizontal bending caused by drag from the ama’s forward motion through the water. The heeling force, resisted by the buoyancy of the ama, pushes up, causing cantilever bending loads in the akas similar to the forces on an airplane wing. Torsion is created when the sails’ lift pushes the leeward ama bow down, while the shrouds supporting the mast pull the weather-side ama stern up. Drag from the leeward ama tries to bend the akas toward the stern, and forces from the windward shroud tend to pull the aka forward as well as up. These forces all act together at the attachment points on the hulls. In most cases, torsion is resisted by the tubular hull and cabin structure itself. Heeling is countered by the cantilever strength of the aka beams and is sometimes strengthened by diagonal waterstay cables beneath. Drag forces can be resolved by the fore-and-aft strength of the akas or by adding diagonal cables between the akas. Each folding system must accommodate these loads through all the pivoting components in the structure.

Of key interest in aka design are the loads imposed on the ama hulls by the seaway when sailing to windward. These hulls are subject to significant loads on the outboard sides. The windward ama is pummeled by wavetops, and the leeward ama is pushed sideways due to leeway. Since the aka system is characteristically attached through the ama deck, these forces are trying to rotate the ama keel inboard, toward the main hull, in either case. The same is true for catamarans, concerning the aka loads where they emerge at the hull inboard sides. These loads can be calculated to estimate the strength required for any configuration and should be part of the design’s stress analysis. If centerboards or daggerboards are located in the amas, those rotating forces are significantly increased.

Of further interest in swing-wing designs is the clearance between pins and brackets in vertical pivot mechanisms. When sailing, the forces at the hinge pins can change from positive to negative repetitively, creating noise and wear. The wear will eventually elongate the holes, reduce pin diameter, and become a maintenance problem. Designs like the flat wing can be tightened to eliminate movement, which will eliminate wear. Amas with waterstays tend to put the akas in compression and stop the vertical deflection that would be normally carried through the hinge pins. In that case, the pins would be loaded in only one direction and not be subject to cyclic ± loads. —J.M.

Read more Construction , Design articles

searunner trimaran

  • Van der Werff’s Curved Wood

A Dutch yard adopts composite panel molding technology to build boats from preshaped wooden hull sections.

searunner trimaran

  • Departures: Carl Chamberlin

Passionate, competent, considerate, modest, and thoughtful is how designer and boatbuilder Carl Chamberlin is remembered by those who knew him. He died last November at age of 75 in Port… Read more »

searunner trimaran

  • SNAME Powerboat Symposium Is Back

The Society of Naval Architects and Marine Engineers (SNAME) Technical and Research Program, in cooperation with the Hampton Roads, Virginia Section of SNAME, will host the Sixth Annual Powerboat Symposium… Read more »

Subscribe to Professional BoatBuilder magazine

Recent Posts

  • SAFE Boats Regains Small-Business Status with Employee Ownership
  • Candela’s Faith in Foiling Ferries
  • Companies (85)
  • Construction (106)
  • Design (161)
  • Drawing Board (10)
  • Education (25)
  • Environment (16)
  • Events (21)
  • Materials (50)
  • Obituary (18)
  • People/Profiles (49)
  • Products (16)
  • Propulsion Systems (32)
  • Racing (16)
  • Repair (37)
  • Rovings (317)
  • Short Cuts (3)
  • Sponsored Partner News (13)
  • Systems (80)
  • Task Sheet (1)
  • Uncategorized (26)
  • Wood to Glass (7)

ProBoat.com Archives

  • Seaclipper 10

The Seaclipper 10 is a solo trainer and harbor racer is fun for the entire family. The crew sits in a secure cockpit, steering with foot pedals, with all sail controls arranged on a dash board, close at hand. Performance is lively, with good steering control in a comfortable, forward facing, semi-reclining position. Construction is beginner level stitch and glue plywood using epoxy adhesives. Most components are ¼″ thick plywood and ¾″ thick lumber. The mast and demountable cross-arms (akas) are aluminum tubing. Expect to spend 3-6 months part time effort to complete. Plans are well illustrated and easy to read. The overall beam is 8′ for trailering. ABOVE: When sailing a Seaclipper 10, the crew sits in the cockpit, steers with his or her feet, and controls all lines without leaving the cockpit. Picture by John Marples. IMAGE 1: SOUR GRAPES was built in the 1980s and restored and relaunched in 2013 by designer John Marples. Picture by John Marples. IMAGE 2: Seaclipper 10s and the Constant Camber 3-meters race together near Vashon Island. Picture by John Marples. IMAGE 3: The Seaclipper 10 BANANAS sailing in San Francisco Bay. Picture by John Marples.

  • You are here:  
  • Seaclipper 13
  • Seaclipper 16 Tandem
  • Seaclipper 16 Open Cockpit
  • Seaclipper 20
  • Seaclipper 24
  • Seaclipper 28
  • Seaclipper 34
  • Seaclipper 38 and 41

searunner trimaran

IMAGES

  1. Due Course Now: Guided Tour of Pegasos, a Jim Brown SeaRunner 37

    searunner trimaran

  2. 1969 Sea Runner 40 Cruising Trimaran

    searunner trimaran

  3. 1971 Trimaran Searunner 37 Sail New and Used Boats for Sale

    searunner trimaran

  4. Searunner 37 Trimaran Hokulele Travelift back into the Pacific

    searunner trimaran

  5. Alato , a Searunner 34 Custom Jim Brown Designed Cruising Trimaran

    searunner trimaran

  6. Searunner 40 Trimaran 1979 for Sale $74,000 New 2022 Boats for Sale

    searunner trimaran

VIDEO

  1. searunner marina view

  2. Fraser River Sturgeon Fishing Hewescraft 210 Searunner

  3. El Toro Racing Trimaran RQYS Multihull Regatta 2024

  4. self built trimaran LIGHTNESS #shorts

  5. Dolphins #shorts

  6. 2023 Hewescraft 190 SeaRunner ET (BHC143)

COMMENTS

  1. Searunner Multihulls

    You can find out more about USCG certification elsewhere on our website. Contact John at marplesmarine [AT]gmail [DOT]com or call him Monday through Friday from 9 a.m. to 5 p.m. (Eastern Time Zone) at 207-326-8096. Searunner trimarans and catamarans designed by John Marples and Jim Brown.

  2. Searunner Multihulls

    Study Plans $10. Design Fee $100. CC23 Cyclone —This fast day-sailing sloop trimaran with central cockpit and up to six person capacity, folds for highway trailering. CC26 —Four adults will enjoy daysailing on this fast trimarans. It can also serve a weekender with berths for two adults and two children.

  3. Searunner Multihulls

    Searunner 25 Trimaran. The Searunner 25 is the smallest boat in this series. Built from 1/4" plywood, it is a light displacement hull that wieghs just 2000 lbs. This boat is designed to fold for transport on a seasonal basis - folding/unfolding takes a few hours with couple of strong people. It is intended for inland and coastal cruising ...

  4. Cruisers & Sailing Forums

    Searunner Trimarans. Group Maintained by Roy M. The Searunner Trimarans are home-built, wooden tri-hull sailboats designed by Jim Brown and John Marples intended for circumnavigation. Searunner Trimarans were designed in five hull sizes: 25, 31, 34, 37 and 40 feet. View All Members Showing 10 of 85 Member (s)

  5. Searunner Trimaran for Sale $26.500 Price New

    Searunner Trimaran has a total of 4 cabins as 2 cabins with a bed for 2 people and 2 cabins with a bed for one person and 3 WCs and 4 bathrooms. Captain cockpit and control console with an ergonomic design. The boat is designed to provide maximum safety, performance, ...

  6. Searunner 31

    The Searunner 31 is a trimaran sailboat designed by Jim Brown in the 1960s. It is the most popular boat in the Searunner series, which includes models from 25 ft (7.6 m) to 40 ft (12 m). The Searunner 31 is a small, trailerable trimaran sailboat known for its performance, versatility, and seaworthiness. It was designed to be sailed single ...

  7. Searunner Trimaran User & Owner Group

    A group for users, owners, and folks interested in the multihull designs of Jim Brown, and those inspired by them, like Constant Camber, to discuss the boats, the builds, the maintenance, the modifications, and their sailing journey with them.

  8. Sailboat Tour Multihull Searunner Trimaran (Ep.26 Sailing w/the

    Sailboat Tour of our Searunner Trimaran! Now that we've got her in decent shape, we'd like to show you around inside! Follow along on some of our other socia...

  9. Searunner_Trimarans

    If you own a Searunner, Seaclipper or Constant Camber boat, please submit the following information. Also, if you know an owner, please send them this page.See below. Note: To send photos, please click this E-MAIL LINK and attach the photo files to a e-mail message. All photos will be posted to the site but the Webmaster reserves the right to ...

  10. For Sale: 2001 Jim Brown Searunner 40 Trimaran

    2001 Searunner 40 for sale Build 1992 to 2000 and launched in 2001. Build in marine ply & west system epoxy this must be one of the newest Searunner 40's out there. She was originally build as 'Ser

  11. Trimaran

    The reasons, are flat sailing, higher speed and shallow draft over monohulls. Catamarans are very popular for cruising but until you get well over 40 ft the interior of the cat is not user friendly, A lot of space is wasted. A trimaran allows the center hull to be fitted out in a more traditional manner (monohull).

  12. Searunner Multihulls

    Constant Camber 40. This boat is designed for extended cruising and/or a live-aboard lifestyle. The accommodation layout is borrowed from the successful Searunner design line with a central cockpit and wing berth accommodations forward and aft. A cutter rig has all sail controls leading to the central cockpit for single handed operation.

  13. Spice, SeaRunner 37 Cruising Trimaran

    Spice, SeaRunner 37 Cruising Trimaran. Instead of going on to college as all his friends did, Tim graduated a year early from high school and spent his senior year building a 25-foot SeaRunner trimaran designed by renowned multihull designer Jim Brown, in a friend's driveway in Palo Alto, California. When his friends were having their graduation night party, Tim was 20 miles off Point Sur ...

  14. Sailing the Searunner Trimaran Named Scrimshaw

    http://www.outrig.org Trimaran designer Jim Brown sails Scrimshaw, his famous Searunner trimaran, Part 1 of 3

  15. Searunner 37

    The Searunner 37 is a trimaran sailboat designed by Jim Brown in the 1960s. It is the second largest boat in the Searunner series, the largest being the Searunner 40. Reception. Jim Brown stayed with Piver's narrow-waisted hulls while introducing the centerboard, center cockpit, and cutter rig. Of the 47 multihulls we spoke outside U.S. waters ...

  16. Seaclipper 16 Open Cockpit HealthCare Center

    A FAMILY BOAT FOR ALL SEASONS. The Seaclipper 16 Open Cockpit folding trimaran is designed for amateur construction from mostly ¼″ (6mm) plywood with epoxy adhesives and coatings. It can be built in less than 6 months by an individual or as a family project.The plans are highly detailed and easy to follow with full-size patterns for many hull parts provided to facilitate the process.

  17. Searunner Trimarans For Sale Reduced to $30,000! 2023

    Craigslist Searunner Trimaran For Sale. Phone: Fax: 011 52 (622) 226-0037. 1-8558-YACHTS (92-2487) (voice/fax) Please Add a comment before the calling of Searunner Boats, we will inform your email address to the owner of the boats. They will reach you by mail or phone. / Searunner Trimaran Modifications.

  18. Searunner cruising speed vs other trimarans

    The searunner trimaran is not a fast boat, but it is a comfortable one, I consider the ride like a magic carpet, slow steady and pay attention to what's going on re wind and waves. I have sailed my searunner 40 from St Croix in the Caribbean to Kadavu Fiji where I am right now, strong windy passages I average 7.5 knots in relative comfort, 6 to 7 knot average in light winds, expecting more ...

  19. Jim Brown

    Jim Brown has been designing multihulls since the 1960s, following his association with designer Arthur Piver. Best known for his Searunner Trimaran series, he is also the author of several books about trimarans, along with a recent a two-book memoir, Among the Multihulls. Jim invented the Constant Camber construction method. In late 1990s, Jim designed the Windrider 16 and 17, both radical ...

  20. Folding Multihulls

    The Searunner 25 trimaran has a hinge mechanism on its metal-tube A-frame akas that secures with bolts at both ends. Commonly, simple hinge systems require that the main hull be positioned rather high on the trailer so the amas clear the trailer wheels beneath. A disadvantage is that the trailer must be submerged more deeply than usual for the ...

  21. Searunner Multihulls

    Seaclipper 10. The Seaclipper 10 is a solo trainer and harbor racer is fun for the entire family. The crew sits in a secure cockpit, steering with foot pedals, with all sail controls arranged on a dash board, close at hand. Performance is lively, with good steering control in a comfortable, forward facing, semi-reclining position.

  22. Trimaran

    Boat: Searunner 40 trimaran, WILDERNESS. Posts: 3,175. Images: 4. Re: Trimaran - Especially Searunner - Owners. I am now 67 years old and still enjoying my Searunner 40. It can be singlehanded (all boats are effectively singlehanded at 3 AM), and my favorite sail is the radial head drifter with a "snuffer".

  23. Searunner sailboats for sale by owner.

    Searunner preowned sailboats for sale by owner. Searunner used sailboats for sale by owner.