mc31 sailboat

This one-design speedster is sporty and sleek, with lots of sail area for sizzle

mc31 sailboat

The MC31 one-design, built by McConaghy Boats in Australia, looks to be a very fast boat. The design is most interesting but I really had to dig through the company’s material to find the designer’s name, Harry Dunning. 

The McConaghy team appears to have pulled out all the stops to endow this design with every possible speed-producing feature. The promotional material makes a point of stressing the efforts they went to so that they could reduce weight. They quote the famous race car engineer, Colin Chapman, saying “To increase performance, add lightness.” 

The first thing that grabs me when I look at this hull is that in plan view (looking down at the deck) there is absolutely no taper to the deck aft. The boat reaches max beam very far forward, just aft of the mast, then stays there to the transom with wide, flaring sections. My guess would be that the disposition of beam is for crew hiking effectiveness. I can’t find a DWL listed in the specs, so I’ll guess the DWL is 28 feet 6 inches for a D/L of 90.36. That’s light but not as light as the promo material suggests.

mc31 sailboat

Draft is 8 feet 6 inches with a long T-bulb on a very high-aspect-ratio, carbon fiber, retracting fin. I have searched the specs but I see no mention of a kelp cutter option. Having just had a kelp encounter in a race two weeks ago, I am suddenly very pro- kelp cutter. This style of T-bulb would be a problem in Puget Sound. The rudder is carbon fiber and very dagger-like in profile.

I get the feeling that a lot of refinement has gone into the deck layout. The deck gear specification is extensive with only two minor options. The material I have is a bit obscure on deck details but what I think I am seeing is an exit on centerline in the cockpit sole for control lines. The mainsheet traveler is aft of the tiller head. The deck forward is perfectly clean except for a very low, sliding hatch for chute work. Note the low drag, foil-shape stanchions. The bowsprit is removable for docking.

This is a very high-powered boat. With 690 square feet of upwind sail area, the SA/D is 39.42. That is a lot of horsepower per pound of boat. Downwind there is 1,710 square feet of sail area. That’s a bit hard to comprehend on a 31-footer. “Time to put your knitting away Mom and get that chute up. Don’t forget your helmet. ” The rig is all carbon fiber.

Construction of the MC31 is e-glass over a foam core and vinylester infused resin. There is a Yanmar 15-horse power diesel with saildrive to get you to the dock. There is kind of an interior. You get a gimbaled stove, some pipe berths, a portable toilet and a cooler that stows under the companionway steps.  As I mentioned, for close one-design racing the specifications are very extensive and there is not much you will need to add for some competitive racing.

I look forward to seeing an MC31 in Seattle.

LOA 30’; LWL 28’6”(est.); Beam 10’; Draft 8’6”; Displ. 4,696 lbs.; Sail area 690 sq. ft.; SA/D 39.42; D/L 90.36; L/B 3.0; Auxiliary 15-hp Yanmar; Fuel 11 gal. 

Our best estimate of the sailaway price: $185,000

McConaghy USA

516-361-9156

www.mcconaghyboats.com

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mc31 sailboat

Mc31 one design

The mc31 one design is a 30.02ft fractional sloop built in fiberglass sandwich e-glass by mcconaghy boats since 2014..

The Mc31 one design is an ultralight sailboat which is a very high performer. It is reasonably stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat. The fuel capacity is originally very small.

Mc31 one design for sale elsewhere on the web:

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MC31 One Design

MC31 One Design is a 30 ′ 0 ″ / 9.2 m monohull sailboat built by McConaghy Boats starting in 2014.

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)

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mc31 sailboat

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mc31 sailboat

Model: MC 31 (Blue Topsides)

Builder: McConaghy Boats China

Designer : Dunning & Assoc

Launched: February 2016

IRC rating: 1.154 (sister ship)

Condition: Excellent, Demo boat

Performance: Excellent racer plus easy to sail

Sails:  North Sails

Price:  $122,000 USD

ENQUIRE FORM - MC 31 Demo

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Racing sailboat MC31 carbon with bowsprit

racing sailboat

Characteristics

9.2 m (30'02" )

3.05 m (10'00" )

2.6 m (8'06" )

2.15 t (2.37 us ton)

15 ch (15 hp)

25 l (7 gal)

Description

No catalogs are available for this product.

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MC 31 at Sydney Harbour Regatta. Photo Andrea Francolini.

MC 31 at Sydney Harbour Regatta. Photo Andrea Francolini.

The MC31 – fast fun and future proof

The new McConaghy 31 is turning heads. Described as a TP 31, it's a smaller version of a TP 52, rather than a production boat. Think a pure race boat that's suitable for one-design and offshore racing with numerous options to configure for both disciplines.

The first boats were launched in late January 2016 and already eight have been sold. Five are in Australia and there is one each in the USA, Hong Kong and Sweden, where the owners are hoping others see the future in this design and build a fleet for one-design racing.

In terms of construction and fitout, the boat is described as “future proofed”. It has the following standard features, that really are the norm for 2016.

  • Southern Spars carbon fibre mast, spreaders and boom.
  • Integral, internal mast jack to adjust rig tension across all conditions.
  • Carbon fibre bow sprit with tack lines run internally and aft to cockpit.
  • Carbon fibre tiller.
  • Carbon fibre stanchions.
  • Control lines, halyards and sheets running under deck for a clean, Grand Prix layout.
  • Grand Prix forward hatch with smooth radius for spinnaker dropline system, closing system and pneumatic, watertight seal both operated from the cockpit to keep weight off the bow.
  • All mainsail controls led back to main trimmer including traveller, fine tune, outhaul and cunningham eye.
  • Vang run under deck to aft end of cockpit for adjustment when all weight is aft. 
  • Fractional gennaker halyard as standard.
  • Optional bullet lock for Fractional Code Zero
  • Optional Genoa Staysail halyard
  • Optional 2nd internal tack line
  • Optional 2nd masthead Gennaker halyard
  • 2nd battery as standard

New South Wales agent Andrew Parkes says the boat was designed and specified for Australian conditions. It has a deep cockpit and offshore-friendly foot chocks.

The MC31 is Cat 2 compliant for coastal offshore races like the Pittwater to Coffs, Sydney Gold Coast or Brisbane to Keppel. She has a measured ORCi stability index of 125.8 which considering that the minimum stability for the Sydney to Hobart Race is 115 shows that although she's a race boat she will be capable of handling the conditions.

Andrew Parkes says, “The MC 31 is designed as a modern, fun, fast and functional race boat. The reaction to the boat at Sydney International Boat Show was extremely positive and a number of test sails are booked for potential buyers from Western Australia, NSW and Queensland. The extremely high level of standard specification and the pedigree and reputation of McConaghy Boats really impressed potential purchasers.

“The Australian Circuit is still being planned, but the Sydney Harbour Regatta, Sail Port Stephens and a number of Sprint Series are confirmed for the coming season.”

Click on the image above to see the photo gallery by Andrea Francolini. And for more information about this exciting new boat go to http://www.mcconaghyboats.com/mc31.html .

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McConaghey Boats Debuts MC 31

  • By McConaghy Boats
  • Updated: January 25, 2016

Following from the success of the MC38 One Design, McConaghy Boats has debuted the MC31 a High Performance, Grand Prix racer that is designed to be fun, fast, and rewarding to sail. Outstanding hull form stability, with a deep draft carbon fin and a heavy bulb combined to provide a low centre of gravity and stability.

The principal behind the MC31 class rules is to provide owners with the thrill of grand prix racing at an affordable price with the guarantee that all owners drive their own boats .

The MC31 features an unprecedented performance driven hull form, and carefully considered systems and deck layout, that enhances the sailing experience, making it ideal for One Design and Club Racing with Offshore Capabilities.

The MC31 was born from a desire to create a boat and class that gave owners and crew the most rewarding time on the water. McConaghy Boats invested considerable time and effort to ensure that the boat and the class rules delivered on the objectives which other classes had failed to do. McConaghy Boats brings this recipe for success to the MC38’s little brother the MC31

For more information visit www.mcconaghyboats.com.

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McConaghy MC31

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Spars & Rigging

Sail inventory, finance calculator.

  • Make McConaghy
  • LOA 31ft/9m
  • Class Performance Sail
  • Hull Glass Reinforced Plastic
  • Keel Fin Keel
  • Engine Single Diesel
  • Drive Sail Drive
  • Layout Aft Cockpit
  • Ancasta Ref 30657
  • Name McConaghy New Boats

Ancasta are acting as brokers for the vendor who is not selling in the course of business unless otherwise stated. These details are prepared from information provided by the vendor and are intended only as a guide to give a fair description of the vessel but their accuracy cannot be guaranteed and they do not constitute part of any contract. A prospective buyer is strongly advised to check the particulars and to have the vessel fully surveyed by a qualified marine surveyor. Details are supplied on the understanding that all negotiations shall be through Ancasta brokerages. This vessel is offered subject to prior sale, price change or withdrawal without notice. Please Note: where the vessel’s status shows as “Preliminary”, details of the vessel have not yet been confirmed by the Vendor.

Enjoy a 10% discount

with Advanced Rigging & Hydraulics  on new standing and running rigging when you buy a used yacht through the Ancasta Brokerage network. Also, contact Advanced Rigging & Hydraulics about their discounts on mooring and anchoring system for motoryachts purchased via Ancasta.

Call: +44 02380 454 280 Email: [email protected] *quote: “Ancasta Brokerage offer”

Or fill out the form

For further information or to arrange a viewing appointment please don't hesitate to contact our Ancasta Ancasta Raceboats Office

  • Call: +44 7759 424 900
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  • Location: McConaghy Factory China
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McConaghy MC31 One Design

Used yachts for sale, sail monohulls 30ft > 35ft,        mcconaghy boats for sale, mcconaghy mc31 one design boats for sale.

mc31 sailboat

McConaghy’s world-class reputation as leaders in the construction of advanced composite yachts has been earned through an enviable record of reliability and race success, and McConaghy now has more maxi yacht line honour wins to its name than any other builder.

Recent Builds

mcconaghy_mach2_foiling_moth

Infiniti 52

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Race Winning Builds

From Fastnet record breakers to America’s Cup and Volvo Ocean Race contenders, the McConaghy name is synonymous with race-winning, high-performance regatta champions and competitors.

With a fleet of over 150 yachts of 30ft and above, designed by the world’s leading designers, our reputation and experience building One Design fleets for the Olympics, J-70’s for J-Boats in Asia, and our own MC31 and MC38 One Design yachts is second to none.

The Rolex Sydney Hobart Race is one of the largest and most iconic events in sailing.  McConaghy has always had strong connections with the race, whether in building these ocean-going race yachts or providing last minute optimisations and alterations leading up to the Boxing Day start. Over the years McConaghy-built boats have had some extremely impressive results and, since 1983, there have been 64 podium finishes.

McConaghy build composite yachts for the world’s toughest conditions and most discerning customers.  McConaghy is the builder of choice for competitive sailors all around the world.

McConaghy Race Boats 19801103 Once More Dear Friend 39_small

Once More Dear Friends

Dubois 39 Naval Architect: Dubois Launched: 1979

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Frers 40 Naval Architect : Frers Launched: 1982

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Sweet Caroline

Dubois 44 Naval Architect : Dubois Launched: 1982

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Reichel Pugh 50 Type: 50 IOR Launched: 1992

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IACC Class Yacht Launched: 1991

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Naval Architect: David Burns Launched: 1995

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Reichel Pugh 68 Launched: 1994

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Challenge Australia

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Ragga Muffin

Farr 50 Launched: 1995

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Farr 50 Launched: 1982

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Reichel Pugh 80 Launched: 2000

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Enigma of London

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Hi fi Team Pryde

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COMMENTS

  1. MC31

    MC31 - McConaghy Boats. The MC31 is a performance club racer and was born from a desire to create a boat and class that gave owners and crew the most rewarding time on the water. The MC31 features an unprecedented performance-driven hull form and carefully considered systems and deck layout, which enhance the sailing experience and make it ...

  2. MC31: More than a sports boat

    MC31: More than a sports boat. 27/03/2017. Following on from the MC38 one design program, McConaghy Boats released its smaller sister the MC31. The intention of this smaller design is to reach an interesting market sector that the team at McConaghy's have pinpointed as ripe for this type of yacht. We took one out for a sail with yacht broker ...

  3. MC31 ONE DESIGN

    MC31 ONE DESIGN. Save to Favorites . Beta Marine. BOTH. US IMPERIAL. METRIC. Sailboat Specifications Definitions ... 1997), states that a boat with a BN of less than 1.3 will be slow in light winds. A boat with a BN of 1.6 or greater is a boat that will be reefed often in offshore cruising. Derek Harvey, "Multihulls for Cruising and Racing ...

  4. 2022 McConaghy MC31 Racer for sale

    2022 McConaghy MC31 Following on from the outstanding success of the MC38 One Design, McConaghy Boats brings you the MC31 a High Performance, Grand Prix racer that is true to it's design brief: fun, fast, and rewarding to sail .

  5. MC 31 design review

    This one-design speedster is sporty and sleek, with lots of sail area for sizzle. The MC31 one-design, built by McConaghy Boats in Australia, looks to be a very fast boat. The design is most interesting but I really had to dig through the company's material to find the designer's name, Harry Dunning. The McConaghy team appears to have ...

  6. MC31 One Design

    McConaghy Boats is pleased to introduce the new MC31,from the drawing board of Harry Dunning, This new highperformance design follows in the footsteps of the...

  7. 2018 Mcconaghy Mc31 One Design

    Hull. The MC31 follows on from the outstanding success of the MC38 One Design, that is a High Performance, Grand Prix racer that is true to it's design brief: fun, fast, and rewarding to sail. Outstanding hull form stability, with a deep draft carbon fin and a heavy bulb combined to provide a low centre of gravity and stability that is ...

  8. Mc31 one design

    The Mc31 one design is a 30.02ft fractional sloop built in fiberglass sandwich e-glass by McConaghy Boats since 2014. The Mc31 one design is an ultralight sailboat which is a very high performer. It is reasonably stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.

  9. MC31 One Design

    MC31 One Design is a 30′ 0″ / 9.2 m monohull sailboat built by McConaghy Boats starting in 2014.

  10. MC 31 One-Design

    The new 31-foot sportboat from Australia's McConaghy Boats adds another powerful option to the growing 30-foot class. They say it'll sail upwind like a proper sailboat but tear downwind like skiff.

  11. MC 31 for sale

    The MC31 was born from a desire to create a boat and class that gave owners and crew the most rewarding time on the water. The MC31 features an unprecedented performance driven hull form, and carefully considered systems and deck layout, that enhances the sailing experience, making it ideal for One Design and Club Racing with Offshore Capabilities.

  12. Racing sailboat

    The MC31 was born from a desire to create a boat and class that gave owners and crew the most rewarding time on the water. The MC31 features an unprecedented performance driven hull form, and carefully considered systems and deck layout, that enhances the sailing experience, making it ideal for One Design and Club Racing with Offshore Capabilities.

  13. The MC31

    The MC31 - fast fun and future proof. 11/08/2016. The new McConaghy 31 is turning heads. Described as a TP 31, it's a smaller version of a TP 52, rather than a production boat. Think a pure race boat that's suitable for one-design and offshore racing with numerous options to configure for both disciplines. The first boats were launched in ...

  14. Boat Plans

    The large beam provides this 31-foot cruising sailboat the equivalent amount of interior space normally found in 3~4 feet larger boats. The resulting design surpassed our expectations in appeal, comfort, and performance. The outcome was that, ... The MC31 is a boat of relatively shallow draught (1.63m). It's very successful bulbous keel ...

  15. McConaghey Boats Debuts MC 31

    McConaghey has debuted the long awaited addition to the 30-foot one design range: the fast, fun MC 31.

  16. McConaghy 31 boats for sale

    2016 McConaghy 31. US$80,637. US $661/mo. Race Yachts | Port Klang, Malaysia. Request Info. <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price.

  17. Used McConaghy MC31 Yacht For Sale

    Following on from the outstanding success of the MC38 One Design, McConaghy Boats brings you the MC31 a High Performance, Grand Prix racer that is true to it's design brief: fun, fast, and rewarding to sail . Outstanding hull form stability, with a deep draft carbon fin and a heavy bulb combined to provide a low centre of gravity and ...

  18. Used Mcconaghy Mc31 One Design for Sale

    McConaghy Boats For Sale → McConaghy MC31 One Design Boats For Sale. Price. AU $120,000 Make an offer. Finance $ 00 per week. Get Finance Quote Now. Currency. Length. 30' 0" - 9.15m. Use. Racing. Vessel Location. Port Klang Launch Year. 2016. Hull Material. Composite. Email Seller Email Seller Call Seller Call Seller Print ...

  19. MC31 World Premiere

    In three short days at Geelong's Festival of Sails, John Taylor's and Rohan Veale's brand new MC31s were unwrapped, rigged and raced for the first time with ...

  20. McConaghy Home

    Excellence in Composite. Whether it's building the world's fastest race boats and luxury cruising yachts or a submarine to explore the Mariana Trench and specialist components for Formula One teams, McConaghy has a proven track record of delivering complex composite constructions. Developing solutions for architects, designers, scientists ...

  21. McConaghy Mc31 boats for sale

    View a wide selection of McConaghy Mc31 boats for sale in your area, explore detailed information & find your next boat on boats.com. #everythingboats

  22. Used Mcconaghy Mc31 One Design for Sale

    Send to Friend. McConaghy MC 31. Key features of the MC31 design that make the performance difference: No rating rule constraints "rate low go slow". Pure clean hull with exceptional hull form stability. Slender high aspect low drag carbon fibre keel fin and rudder blade. Lightweight hull deck and rig, heavy bulb.

  23. Race Boats

    With a fleet of over 150 yachts of 30ft and above, designed by the world's leading designers, our reputation and experience building One Design fleets for the Olympics, J-70's for J-Boats in Asia, and our own MC31 and MC38 One Design yachts is second to none. The Rolex Sydney Hobart Race is one of the largest and most iconic events in sailing.