Moth (dinghy)
The Moth a small development class of sailing dinghy. Originally a small, fast home-built sailing boat designed to plane, since 2000 it has become an expensive and largely commercially-produced boat designed to hydroplane on foils.
 Class symbol | |
 An International Moth Class sailing hydrofoil flying over the water. | |
| Development | |
|---|---|
| Design | Development class |
| Boat | |
| Crew | 1 |
| Hull | |
| Type | Monohull |
| Construction | Carbon Fiber or Fiberglass |
| Hull weight | Unrestricted |
| LOA | 11 ft (3.4 m) |
| Racing | |
| RYA PN | 600 |
The pre-hydrofoil design Moths are still sailed and raced, but are far slower than their foiled counterparts.
Types
There have been several types of Moth since the first use of the class name in the 1920s:
- The Classic Moth, a traditional dinghy with tighter design restrictions
- The British Moth, designed in 1932 and revived in 2004
- The Restricted Moth of the 1960s and 70s, with few design restrictions to allow for class development (International Moth in Australia and New Zealand)
- The Europa Moth, which became the Olympic Europe dinghy
- The New Zealand Mark 2 scow Moth, abundant in the 1970s
- The International Moth, a fast sailing hydrofoil dinghy with few design restrictions.
History
Beginnings
The current International Moth is a result of merging two separate but similar historical developments. The first occurred in Australia in 1928 when Len Morris built a cat rigged (single sail) flat bottomed scow (horizontal bow rather than the "normal" vertical bow) to sail on Andersons' Inlet at Inverloch, a seaside resort 130 kilometres (81 mi) from Melbourne. The scow was hard chined, 11 feet (3.4 m) long, with a single 80 square feet (7.4 m2) mainsail. The craft was named "Olive" after his wife. The construction was timber with an internal construction somewhat like Hargreave's box kite. "Olive's" performance was so outstanding, that a similar boat "Whoopee" was built. Len Morris then sold "Olive", and built another boat called "Flutterby", and with those three boats, the Inverloch Yacht Club was formed. Restrictions for the class known as the Inverloch Eleven Footer class were then drawn up, with the distinguishing characteristic that of being not a one-design boat but rather that of a boat permitting development within the set of design parameters.
At much the same time, 1929 in fact, halfway around the world another development class, the American Moth Boat was started by Captain Joel Van Sant and Ernest J. Sanders [1] of Elizabeth City, North Carolina[2] with the boat “Jumping Juniper” built of Atlantic White Cedar from the Great Dismal Swamp. The major difference between the Australian and American boats early on was that the American boat used only 72 square feet (6.7 m2) of sail on a somewhat shorter mast. The US development class was formally organized in 1932 as the "National Moth Boat Association" and in 1935, due to increasing overseas interest, changed its name to the "International Moth Class Association" or IMCA.
In 1933, an American magazine, The Rudder, published an article dealing with the Moth Boat scene in the US. The Australians noted the similarities between the two groups of boats and intuitively realized that the name "Moth Boat" rolled more easily from the tongue than "Inverlock Eleven Footer Class", and changed the name of their class to Moth. The Australians also noted the differences, particularly in sail plan between the two boats, but since this was in the middle of the great depression, and the two groups were 13,000 miles apart, no attempt was made to reconcile these differences. Thus two large Moth classes developed separately for over 30 years.
Early growth
The British Moth Class dates to the early 1930s. The class was restricted to a particular hull shape of a 1930s Vintage American Moth Boat, and is thus a one-design boat, not a development class which allows experimental development with shapes and materials.
The Victorian Moth Class Association was formed in Australia in 1936. After WWII, the NSW Moth Class Sailing Association was formed, with foundation members coming from Seaforth Moth Club and Woolahra Sailing Club. all other Australian states formed Moth Associations between 1956 to 1961. The Australian Yachting Federation (AYF) recognized the Australian Moth class as a national class in 1962, the first small boat class in Australia to be granted national status. Australian Moths were using pre-bent and wing masts in the 1950s. In the 1960s, Australian Moth sailors campaigned for rules changes that would permit the Australian Moths to compete in the IMCA's "World Championships".
European interest increased after the second world war. The European Moth clubs subscribed, more or less, to the US class rules. One European Moth design from the early 1960s, the "Europa Moth", broke away from the IMCA and formed the one-design Europe dinghy class. It was adopted as the woman's single-hander used in the Olympic games from 1992-2004.
International Moth Class
In 1971 the US-based IMCA completed a phase-in of new rules which attempted a "marriage" of the IMCA and the Australian Moth. This amalgamation process had started at the annual IMCA meeting in 1965. New rules embraced the larger, more powerful high aspect, loose footed, fully battened rig of the Australian Moth. The new rules also permitted controversial hiking wings first seen on Moths from Switzerland. Finally, guided by the influential UK Moth sailor and WW2 war hero, Major Tony Hibbert, the rule change abolished the US centralized organization of the class in favor of an independent world body with equal-partner national associations. Each national association elected its own officers and world body representatives. The culmination of these changes was the recognition in 1972 of the IMCA by the International Yacht Racing Union (the forerunner of today’s World Sailing) bound by the agreed upon new restrictions of the class (with metric measurement conversions) operating today. The moth class association that had originated in the US was now truly an international organization.
Being a development class, the Moth has evolved from a hull in the 1930s that could best be described as a heavy, narrow scow or a blunt nosed skiff, (weighing about 50 kg) to today’s remarkable foilers with hull weights of under 10 kg. Designs have run the gamut from wide skiffs without wings, to lightweight scows, to wedge-shaped hulls characterized with narrow waterlines and hiking wings out to the maximum permitted beam. Likewise, the sail plan has evolved from cotton sails on wooden spars, through the fully battened Dacron sails on aluminum spars, to the windsurfer inspired sleeved film sails on carbon masts seen today.
In New Zealand the class reached its maximum popularity in the late 1960s and early 70s. The NZ Moth was standardized as a 90 lb flat bottom scow type known as the Mk2 using an alloy spars and a Dacron sail. The measured sail area was nominally 80 square feet but the actual area grew to about 90 square feet by 1970. Many hundreds were home made by amateurs. In addition there were a smaller number of International Moths of both scow and skiff type. Hulls were noticeably lighter -down to 50 lbs for skiffs using plywood by 1970. The international yacht designer Bruce Farr built Moths to his own design in the 1967-1971 period when still a young school boy.
Rebirth
In the United States in the late 1970s participation in the International Moth class died and the class growth and interest moved to Europe and Australia. After ten years of little Moth activity in the US, several sailors started looking for old Moth Boats with the original US rig to restore and race. A newsletter was started to aid communication between like-minded Mothists. Racing of "Classic Moths" resumed in 1989 and in 1990 a new club was formed to govern racing and construction of Classic Moths. This club, the Classic Moth Boat Association or CMBA is the current governing body for the original US type of Moth Boat. The intent of the CMBA is to revive the original US version of the boat and update the rules so that development is permitted without allowing the boats to become too freakish. The IMCA rules from 1965, the final year prior to the phase-in of the Australian rig and wings were consulted as a starting point for reviving the US Moth. Those rules have been revised where necessary. Interest in Classic Moths has grown internationally, with new activity in Europe, primarily France.
Moth firsts
The International Moth has fostered a number of achievements. In 1966-67, The King of Siam was involved in the building of three Moths and sailed them on the pond at Chitrlada Palace. The King raced for almost 20 years on his second moth called 'Super Mod' until his design and construction efforts were cut short by the 'press of royal duties'.[3] In 1957 Patricia Duane became the first woman to win the moth world championship in her Cates-Florida design. In 1968 Marie Claude Fauroux became the first woman skipper to win a World dinghy racing title from an IYRU sanctioned international class, in her Duflos-designed moth. The International Moth was selected as an official training class for the Japanese Olympic sailing team, to hone their balance skills.
Since 2000 International Moths have begun using lifting hydrofoils on the daggerboard and rudder, which lift the entire hull and skipper above the water surface, dramatically reducing drag and increasing speed. The top speed achieved as of 2018 is 36.5 knots, the highest 10 second average of 35.9 knots[4] (66.5 km/h) was recorded on 14 May 2014. This high speed is reflected in the International Moth's RYA Portsmouth Yardstick of 570, the fastest (As of 2016) of any sailing dinghy or multihull.[5]
Events
National Moth Boat Association (NMBA) Championship 1933-1934
International Moth Class Association (IMCA) International Championship 1935-1972
Competing for the Antonia Trophy from 1933-1964 and the Carling Trophy from 1965-present
| Year | Gold | Silver | Bronze |
|---|---|---|---|
| 1933 Elizabeth City, NC, USA |  |
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| 1934 Atlantic City, NJ, USA | |
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| 1935 Melbourne, FL, USA | |
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| From 1936-1938 the international trophy
was sailed for twice in the same year. At the 1938 AGM this was changed to once per year. |
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| 1936a Melbourne, FL, USA | |
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| 1936b Atlantic City, NJ, USA | |
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| 1937a Eau Gallie, FL, USA | |
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| 1937b Atlantic City, NJ, USA | |
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| 1938a Miami, FL, USA | |
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| 1938b Norfolk, VA, USA | |
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| 1939 - the race was cancelled due to weather | |||
| 1941 Elizabeth City, NC, USA | |
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| 1942-45 No races due to the war | |||
| 1946 Atlantic City, NJ, USA | |
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| 1947 Atlantic City, NJ, USA | |
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| 1948 Atlantic City, NJ, USA | |
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| 1949 Elizabeth City, NC, USA | |
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| 1950 Old Greenwich, CT, USA | |
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| 1951 Norfolk, VA, USA | |
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| 1952 Margate, NJ, USA | |
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| 1953 Norfolk, VA, USA | |
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| 1954 Miami, FL, USA | |
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| 1955 West Palm Beach, FL, USA | |
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| 1956 Miami, FL, USA | |
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| 1957 West Palm Beach, FL, USA | |
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| 1958 Brandt Beach, NJ, USA | |
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| 1959 Miami, FL, USA | |
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| 1960 Bandol, France |  |
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| 1961 New Jersey, USA | |
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| 1962 Ostend, Belgium | |
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| 1963 New York, NY, USA | |
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| 1964 Bandol, France |  |
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| 1965 Cape May, NJ, USA | |
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| 1966 Lausanne, Switzerland | |
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| 1967 Miami, FL, USA | |
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| 1968 Cannes, France | |
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| 1969 Ocean City, NJ, USA | .svg.png){kind=small} |
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| 1970 Victoria, Australia | |
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| 1971 France | |
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| 1972 Switzerland | |
International Moth Class Association (IMCA) World Championship 1973-present
Year |
Gold | Silver | Bronze |
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| 1973 Hawkes Bay, New Zealand | |
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| 1974 Sweden | |
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| 1975 Australia | |
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| 1976 Ware River, VA, USA | |
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| 1977 Hayling Island, England | |
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| 1978 Brisbane, Australia | |
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| 1979 Travemünde, Germany | |
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| 1980 New Zealand | |
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| 1981 Harderwijk, The Netherlands | |
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| 1982 Australia | |
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| 1983 Eastbourne, Great Britain | |
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| 1984 Hamaniko, Japan | |
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| 1985 ThunerSee, Switzerland | |
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| 1986 Adelaide, Australia | |
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| 1987 Göteborg, Sweden | |
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| 1989 Auckland, New Zealand | |
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| 1990 Ratzeburg, Germany | |
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| 1991 Miyazu City, Japan | |
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| 1993 Highcliffe, Great Britain | |
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| 1995 Lake Macquarie, Australia | |
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| 1996 Ratzeburg, Germany | |
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| 1998 Torbay, Great Britain | |
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| 2000 Perth, Australia | |
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| 2001 Choshi, Japan | |
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| 2003 Les Sables d'Olonne, France | |
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| 2004 Melbourne, Australia | |
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| 2006 Horsens, Denmark | |
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| 2007 Torbole, Italy | |
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| 2008 Weymouth, England | |
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| 2009 Cascade Locks, OR, USA | |
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| 2010 Dubai, UAE | |
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| 2011 Belmont, Australia | |
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| 2012 Campione, Italy | |
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| 2013 Kaneohe, HI, USA | |
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| 2014 Hayling Island, England | |
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| 2015 Sorrento, Victoria, Australia |  |
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| 2016 Hayama, Kanagawa, Japan | |
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| 2017 Malcesine, Italy[6] | |
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| 2018 Bermuda | |
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| 2019 Crawley (AUS) 118 Boats[7] |
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See also
References
- https://www.pilotonline.com/news/article_9a72cd9f-d07a-5f6d-bd90-3a2e4521411a.html
- "Classic Moth Boat Association". Classic Moth Boat Association. Retrieved 2014-04-29.
- "Olive -". www.moth-sailing.org.
- Goss, Ned (14 May 2014). "CONFIRMED: 36.6 KNOTS ACCORDING VELOCITEK PROSTART". Sail Anarchy. Archived from the original on 1 October 2018. Retrieved 1 October 2018.
- "Portsmouth Number List 2018" (PDF). Royal Yachting Association. Retrieved 1 October 2018.
- "Results". 25 December 2016.
- https://mothworlds.org/perth/
