125 (dinghy)

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125
125 insignia.png
Class symbol
125 dinghy.JPG
Development
DesignerSimon Greig
Location Victoria, Australia
Year1969
Design One-Design
RoleIntermediate trainer, racing
Boat
Crew2
TrapezeSingle
Hull
Type Monohull
Construction GRP; Plywood; Foam Sandwich
Hull weight50 kilograms (110 lb)
LOA 3.81 metres (12 ft 6 in)
Beam 1.43 metres (4 ft 8 in)
Hull appendages
Keel/board type Centerboard
Rig
Rig type Bermuda
Mast length5.65 metres (18 ft 6 in)
Sails
Mainsail area6.5 square metres (70 sq ft)
Jib/genoa area3.0 square metres (32 sq ft)
Spinnaker area8.6 square metres (93 sq ft)
Racing
D-PN 123.0 [1]

The 125 is a 12 ft 6 in (3.81 m) two person intermediate sailing dinghy complete with main, jib, spinnaker and trapeze. The 125 class has a strong following within Australia with national titles being held every year around the country and local state associations. The class was originally designed as an intermediate class for developing skills with the jib, spinnaker and trapeze but has become popular from novice to experienced sailors.

Dinghy type of small boat

A dinghy is a type of small boat, often carried or towed for use as a lifeboat or tender by a larger vessel. The term is a loanword from the Bengali ḍiṅgi, Urdu ḍīngī & Hindi ḍieṁgī. Utility dinghies are usually rowboats or have an outboard motor, but while some are rigged for sailing, they are not to be confused with sailing dinghies which are designed first and foremost for this purpose.

A jib is a triangular sail that sets ahead of the foremast of a sailing vessel. Its tack is fixed to the bowsprit, to the bows, or to the deck between the bowsprit and the foremost mast. Jibs and spinnakers are the two main types of headsails on a modern boat.

Spinnaker

A spinnaker is a sail designed specifically for sailing off the wind from a reaching course to a downwind, i.e. with the wind 90–180° off bow. The spinnaker fills with wind and balloons out in front of the boat when it is deployed, called flying. It is constructed of lightweight fabric, usually nylon, and is often brightly coloured. It may be optimised for a particular range of wind angles, as either a reaching or a running spinnaker, by the shaping of the panels and seams.

Contents

History

The 125 was designed in 1969 by Simon Greig as a class that would sit between Jack Holt's 3.3 m (10 ft 10 in) Mirror and the larger Mirror 16 at 4.9 m (16 ft). [2] As with the Mirrors, the 125 can be assembled from plywood using the "stitch and glue" method, and, as far as possible, the 125 uses Mirror parts in its design. [2] [3] The parallels between the boats go as far as the design of the sail insignia – the 125 employs a design based on the Mirror's symbol lying on its side. [2]

Jack Holt, OBE (1912–1995) was a prolific designer of sailing dinghies. His pioneering designs of dinghies using plywood did much to popularise the sport of sailing in the period immediately following World War II.

The Mirror is a popular sailing dinghy with more than 70,000 built.

The Mirror 16 is a class of sailing dinghy which was sponsored by the Daily Mirror newspaper in 1963 and the design project was headed by Jack Holt. Its design was based upon the easy to construct stitch and glue principle introduced by Barry Bucknell for the Mirror 11 dinghy. The Mirror 16 was designed for the racing enthusiast and also the camping/potterer dinghy sailor. The concept was a relatively light dinghy with a large sail area that could easily be reefed. The main sail was designed for slab reefing and the large genoa had roller reefing. The Mirror 16, like the Mirror 11, was produced with distinctive red sails. The Mirror 16 was faster than the Proctor-designed Wayfarer.

Nevertheless, initial sales were not good, and with the arrival of the Mirror 14 Greig had decided not to continue production. However, John Coomer had built one of the few kits that had been sold, and encouraged Greig to continue producing kits if buyers were available. A new sail plan was developed based on the Flying Junior, and Coomer developed class rules and a constitution for the 125. Yet while his 125, Beauty Bottla, was successful in racing, there was no real demand for the class. [2]

Things changed in 1972 when Greig handed over the copyright for the design to Coomer to be used by any association that might be formed. [4] Subsequently the new association was developed, the boat was marketed by the association, and as a result sail numbers increased from 6 in 1970 (with Coomer's boat) to 21 in late 1972. By 1977 over 950 sets of plans had been sold, and the first National Championships were held that year. [2]

The class continued to develop under a strict set of rules, with various modifications being made to the specification over the years – including, in 1990, a provision for fiberglass hulls. [2]

Fiberglass (US) or fibreglass (UK) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet, or woven into a fabric. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinylester—or a thermoplastic.

Popularity

According to the national association, there are a number of attributes of the class that may contribute to its popularity. In particular, the class caters to both intermediate sailors who have graduated from the sail trainers (such as the Sabot and Optimist dinghies), providing a more extensive sail plan and a trapeze on a relatively stable and forgiving hull, while also being suitable to both adult/child and adult/adult combinations. [5] Furthermore, the 125 is a relatively low cost boat, making it suitable to sailing on a budget – especially if an older, wooden, hull is purchased. [4] [5] The boat can be sailed in all Australian states, and sailors can compete at both state and national levels of competition. [4]

Sabot (dinghy)

The Sabot is a sailing dinghy that is sailed and raced singlehandedly usually by young sailors in various parts of the world.

Optimist (dinghy) ship type

The Optimist, also known as the 'bathtub', is a small, single-handed sailing dinghy intended for use by children up to the age of 15. Contemporary boats are usually made of fibreglass, although wooden boats are still built.

The popularity of the class to sailors of varying ages and skill levels can be problematic, as it leaves race organisers with difficulties trying to have all sailors finish within a reasonable time.[ citation needed ] As of 2009 there are fleets of 125's in Queensland, New South Wales, Victoria, South Australia and Western Australia. [4]

Related Research Articles

Dinghy sailing

Dinghy sailing is the activity of sailing small boats by using five essential controls:

49er (dinghy) ship type

The 49er and 49er FX is a two-handed skiff-type high-performance sailing dinghy. The two crew work on different roles with the helm making many tactical decisions, as well as steering, and the crew doing most of the sail control. Both of the crew are equipped with their own trapeze and sailing is handled while "flying".

Cadet (dinghy)

The Cadet is a class of sailing dinghy designed to be sailed by two children up to the age of 17. It is a one-design class, originally designed by Jack Holt in 1947. Cadets are sailed worldwide in more than 40 countries.

Hobie Cat

The Hobie Cat is a small sailing catamaran manufactured by the Hobie Cat Company. Hobie's line of products ranges from surfboards to catamaran sailboats to kayaks and stand-up paddle boards, though the Hobie Cat Company is most famous around the world for its catamarans. Hobie also designed a very successful monohull, the Hobie 33.

Laser 2

The Laser 2 is a double-handed version of the popular Laser one-design class of small sailing dinghy. It is a quick, planing dinghy that differs from the Laser in that it has a jib, symmetric spinnaker and a trapeze for the crew. It was designed by New Zealander Frank Bethwaite and was first launched as a product in Australia then North America in 1979 and in Europe in 1980. The hull is made of GRP. The rig is a Bermudian rig sloop with spinnaker. It is designed to be a mid to high performance racer. In Britain, its most common current use is at university class in British University Sailing Association (BUSA) events. A version known as the Laser Fun was available, the same hull but featuring a reefable mainsail and a roller furling jib, and with the option of an asymmetric spinnaker. As a strict one-design boat the Laser 2 was not available for amateur construction.

Manly Junior junior racing dinghy class

The Manly Junior is a junior racing dinghy class popular in Sydney Australia. It was designed in 1959 for younger sailors and the length was originally designed so that the boat could be stored vertically downstairs inside Manly Yacht Club. To provide as much performance as possible in a short length, the designer, Ralph Tobias used a "snub" bow.

18ft Skiff

The 18 ft Skiff is considered the fastest class of sailing skiffs. The class has a long history beginning with races on Sydney Harbour, Australia in 1892 and later in New Zealand. The boat has changed significantly since the early days, bringing in new technology as it became available. Because of the need of strength, agility and skill, the class is considered to be the top level of small boat sailing. In Australia this boat is called the "Aussie 18" due to its inherent connections to Australia. It is the fastest conventional non-foiling monohull on the yardstick rating, with a score of 675, coming only third after the Tornado and Inter 20.

The International 14 is a 14-foot double-handed racing dinghy. The class originated in England in the early part of the 20th century. It is sailed and raced in many countries around the world and was one of the very first true international racing dinghy classes recognised by International Sailing Federation. It is a Development Class being controlled by a set of rules that allow for innovation and changes in hull and rig design as long as they fall within a set of specific limitations such as length, weight, beam, and sail area. The class has permitted its rules to be revised at various times in its history in order to keep the class at the forefront of dinghy racing development and can now best be described as an ultralight dual-trapeze sailing dinghy with large sail area. It is often raced with boats of similar design in one-design, or non-handicap races.

12ft Skiff

The 12ft Skiff is a development dinghy class dating back to the early 20th century. It is sailed in Australia and New Zealand. It is 12 ft (3.7 m) in length, hence the name, and is a two-man boat. Both the crew and the helm are able to use the trapeze at the same time. It has an asymmetrical spinnaker and a jib, in addition to the mainsail.

Cherub (dinghy)

The Cherub is a 12 feet long, high performance, two-person, Planing dinghy first designed in 1951 in New Zealand by John Spencer. The class is a development class, allowing for significant variation in design between different boats within the rule framework. The minimum hull weight was originally 110 lbs.

RS800

The RS800 is a light-weight sailing dinghy designed by Phil Morrison and manufactured by RS Sailing. The boat is sailed by two people both on trapeze and has a main, jib and spinnaker. The RS800 has a Portsmouth Yardstick number of 820 and a D-PN of 77.0. There is a large racing circuit in the UK, and some European events each year.

Laser 3000

The Laser 3000 is a racing sailing dinghy crewed by two persons with a trapeze for the crew. Launched in 1996, the 3000 was developed from the Laser 2, using the original Frank Bethwaite-designed planing hull combined with a brand new self-draining deck by Derek Clark. Clark also re-designed the rig, using spars and sails from premium proprietary sources and replacing the symmetric spinnaker of the Laser 2 by a larger asymmetric spinnaker (gennaker). The gennaker is chute-launched and retrieved using a single halyard line, and is set on a retractable bowsprit. Helm balance and handling were improved using a shorter-footed mainsail with two full-width battens giving a larger roach. A mast with conventional spreaders replaced the now-unusual diamond arrangement of the Laser 2.

Sunburst (dinghy)

The Sunburst is a two-handed, 3.5 metres (11 ft) centreboard sailing dinghy. It was designed in the late 1960s in New Zealand by John Balmain Brooke, where it was to become one of the most popular classes of boat. It is popular as a craft for teaching beginner sailors, and is used in races in New Zealand.

3000 (dinghy)

The 3000(formally the Laser 3000) is a racing sailing dinghy crewed by two persons with a trapeze for the crew. Launched in 1996 as the Laser 3000, the 3000 was developed from the Laser 2, using the original Frank Bethwaite-designed planing hull combined with a new designed self-draining deck by Derek Clark. Clark also re-designed the rig, using spars and sails from premium proprietary sources and replacing the symmetric spinnaker of the Laser 2 by a larger asymmetric spinnaker (gennaker). The gennaker is chute-launched and retrieved using a single halyard line, and is set on a retractable bowsprit. Helm balance and handling were improved using a shorter-footed mainsail with two full-width battens giving a larger roach. A mast with conventional spreaders replaced the now-unusual diamond arrangement of the Laser 2.

16ft Skiff

A 16 ft Skiff is a class of three-person sailing dinghy with twin trapezes and a large asymmetrical spinnaker. The class is unique to Australia, where it is one of the most popular boats sailing with 95 boats registered in 12 clubs. The class has the largest fleet of high performance skiffs on the east coast of Australia. Due to the nature of only allowing two trapezes, the age of the sailors can vary between 15 and 60 years old, making it a versatile class of boat.

MG14

MG14 is a two-person skiff with a high-performance development hull, single trapeze and asymmetrical spinnaker.

The RS700 is a single-handed racing dinghy built by RS Racing and designed in 2000 by Nick Peters and Alex Southon as part of the RS series and built in 2001. It is raced in many sailing clubs around Britain, with a PY number of 850 and a D-PN of 73.3.

Buzz (dinghy) sailing dinghy designed in 1994

The Buzz is a sailing dinghy designed in 1994 by Ian Howlett and John Caig and manufactured by Reg White Limited of Brightlingsea as part of the "White Formula" range of boats originally marketed by Topper International Ltd but since 2013 by Vantage Sailing. The Buzz is a double handed racing boat, with a single trapeze for the crewman. The boat has a fully battened mainsail, furling jib and an asymmetric spinnaker. There have been around 500 boats built. The Buzz is designed to be an easy to sail boat, but it can also be raced competitively.

References

  1. "2004-2005 Yardsticks". Yachting Victoria. Archived from the original on 6 July 2011. Retrieved 10 March 2010.
  2. 1 2 3 4 5 6 "The History of the 125". National 125 Sailing Association. Retrieved 10 March 2010.
  3. "Building a 125". National 125 Sailing Association. Archived from the original on 1 February 2010. Retrieved 10 March 2010.
  4. 1 2 3 4 "125". YACHTe.com.au. Archived from the original on 3 March 2011. Retrieved 10 March 2010.
  5. 1 2 "Why Sail a 125?". National 125 Sailing Association. Retrieved 10 March 2010.