505 (dinghy)

International 505
Boat
Class symbol

Crew	2 (single trapeze)
Draft	1.45 m (4 ft 9 in)
Hull
Hull weight	127.4 kg (281 lb)
LOA	5.05 m (16.6 ft)
Beam	1.88 m (6 ft 2 in)
Sails
Spinnaker area	27 m² (290 sq ft)
Upwind Sail Area	16.26 m² (175.0 sq ft)^[1]
Misc
D-PN	79.8
RYA PN	902
PHRF	149.4

The International 505 is a one-design high-performance two-person monohull planing centreboard dinghy, with spinnaker, using a trapeze for the crew. While it is a high-performance boat and demanding in a blow, the 505 is an extraordinarily well-handling craft and is easier to control than many smaller trapeze boats.

History

The genesis of the class was in 1953 with the creation of the 18-foot 'Coronet' dinghy designed by John Westell. This sailboat competed in the International Yacht Racing Union (IYRU) selection trials at La Baule, France, in 1953 for a new two-person performance dinghy for the Olympics. Although the Coronet lost Olympic selection to the Flying Dutchman (even though its performance was notably superior), in 1954 the Caneton Association of France asked Westell to modify his Coronet design to create for them a 5-meter performance dinghy that would be suitable to their needs. Westell settled on a measured length 5.05 m to allow for boat-building tolerances of the day, and the resulting craft become known as the 505. The class achieved international status with the IYRU in 1955.^[2]

Fleets

The 505 is a very popular international class and is raced actively in 18 countries around the world, with the largest numbers in Germany, the US, UK and Australia. World championships are held every year at locations around the world, alternating between Europe, North America and Southern Hemisphere countries, and consistently attract over 100 boats to the start line. At the 2005 World Championships held in Warnemünde, Germany there were 171 boats. The 505 may also be sailed in a mixed fleet using the Portsmouth Yardstick handicap scheme. Its Portsmouth number (administered in the UK) is 902^[3] and its D-PN (administered in the USA) is 79.8 .^[4]

There are not many fleets in the conventional sense of boats parked side-by-side at a club and regular attendance at series-type 'club racing' is not typical for this class. The ease of trailering and storage of the boat coupled with its complexity, which makes it both engaging to tinker with and somewhat risky to leave untended in a parking lot, has led to many owners keeping their boats at home. Fleets are essentially collectives of sailors that keep in touch and train together at a convenient facility for the regional 505 event calendar, which may include perennial fixtures as well as regional, national or world championship regattas. Europe in particular has a well-attended calendar of events that attracts sailors from all over the continent because of the ease of travel and excellent venues (Hyeres, Lake Garda, Kiel, etc.).

Locales that have established core groups of 505 sailors are as follows:

Australia:	Brisbane, Coffs Harbour, Adelaide, Fremantle
USA:	Marblehead, Rye, Annapolis, Clearwater, San Diego, Long Beach, San Francisco/Santa Cruz, Seattle/Bellingham
UK:	England (many locations), Scotland
Germany:	Kiel, Warnemünde
Rest of Europe:	Finland, Sweden, Denmark, France, Italy, Switzerland, Poland, Ireland
Canada:	Ottawa/Kingston, Toronto, Vancouver
South Africa:	Port Elizabeth

The Boat

The hulls of early 505s were built in cold-molded marine plywood. Many of these are still actively raced. New hulls are now built using composite molding: glass fibre and/or carbon fibre mats and vinylester or epoxy resin using either a wet layup technique or using heat-cured prepreg sheets. Hulls are usually cored with foam, balsa or Nomex to increase stiffness and durability: new hulls will remain competitive for well over ten years, and boats several times that age have won races in major championships. Spars traditionally were aluminum alloy, but recent rule changes have permitted the use of carbon fibre for booms and spinnaker poles (though not for masts.) The hull shape and sail plan are tightly controlled, while the spars, foils and rigging are more open. This allows the boat's rig and controls to be set up to the preferences of the sailor, rather than dictated by the class rules (as they are for the Laser class, for example.) The rig itself is highly adjustable for wind and sea conditions, with the result that the boat can be sailed in a relatively wide range of wind speeds and by crews of varying sizes. Successful teams come in many combinations, including all-female, all-male, mixed, and child/adult or child/teen. As of 2009, over 9000 505s had been built.

There have been many builders over the 60-year history of the class. At present Rondar Raceboats is the most prolific builder, producing wet-layup hulls on a semi-production basis. Ovington Boats, which at one time built hulls for Rondar under contract, now build their own.

List of current 505 hull builders:

Builder	Location	Description	Website
Rondar Raceboats	GBR	Hulls and complete boats	www.rondarraceboats.com
Ovington Boats	GBR	Bare hulls only	www.ovingtonboats.com
Parker 505	GBR	Bare hulls and complete boats	www.parker505.com
Van Munster Boats	AUS	Bare hulls and complete boats	www.vanmunsterboats.com
Duvoisin Nautique	SUI	Bare hulls only	http://duvoisinnautique.ch/en

It is typical for sailors to purchase bare hulls, spars and foils, and then rig the boats themselves. The result is that there is a wide variety of setups, with some notable regional preferences. For example, US boats traditionally have end-boom sheeting while German boats have mid-boom. This has led to the establishment of several rigging businesses, led by successful 505 sailors, that have developed standard rigging setups and sell complete boats based on bare hulls sourced from builders. These include Holger Jess with SegelsportJESS in Kiel, GER and Ian Pinnell of Pinnell & Bax in Northampton, GBR. Having standard setups with published tuning settings helps non-professional sailors become competitive more quickly. Similarly with sails. There are a handful of sailmakers that dominate the 505 class: Pinnell & Bax in the UK, Bojsen-Møller in Europe, and Glaser and North in the US.

Sailing Characteristics

The 505 is a big boat by dinghy standards, with a powerful sailplan, especially with the adoption in 2002(?) of a much larger spinnaker. It is generally considered a class for adults, with world class crews usually having a combined weight in the range of 150 to 185 kg. It is remarkably well-balanced under main and jib, even in big breeze: many boats use a fixed tiller/rudder requiring beach launched boats to be sailed without a rudder into deeper water. The 505 will plane upwind in windspeeds of around 10 knots or more. Offwind, the 505 is very exciting, but still well-behaved. In winds above 12 knots it is usually advantageous to "tack downwind", utilizing the apparent wind advantages of broad-reaching, rather sailing downwind. With a big spinnaker and conventional pole, gybing in a breeze is a particularly challenging manoeuver and pulling it off consistently is the defining "rite of passage" between novice and skilled crews.

Even after 60 years, the 505 remains one of the most sophisticated and rewarding sailboats to sail. The list of 505 "alumnae" includes many of the world's top professional sailors, many of whom attend major 505 events to keep their sailing skills sharp.

Future

The 505 has a track record for adopting technological advances in the sport, keeping the class current and relevant but without rendering existing boats obsolete. Experimental modifications to the accepted design, i.e. outside of the class rules, have been conducted at different points in history. Such modifications have included setting up a double-trapeze system, installation of a bowsprit, and inclusion of an asymmetric spinnaker. To date these have not been adopted by the 505 Class Association.

Preparation for schooner race (SAP 5O5 World Championship). The 505 is named for its length, 5.05 meters (16.5 feet).

Events

World Championships

Year	Gold	Silver	Bronze
1956 La Baule	France Jacques Lebrun P. Harinkcouck
1957 La Baule	Denmark Paul Elvstrøm P. Poullain
1958 La Baule	Denmark Paul Elvstrøm P. Poullain
1959 Cork	France Marcel Buffet Patrick Wolff
1960 La Baule	France Marcel Buffet Patrick Wolff
1961 Weymouth	France J. Cornu D. Doufier
1962 La Baule	Great Britain Keith Paul Bill Moakes
1963 Larchmont	Australia Brian Price Chris Hough	United States Henry Schefter Brian Smart
1964 Cork	Australia John Parrington Chris Hough
1965 Tanger	Great Britain Derek Farrant Robin Farrant
1966 Adelaide	Australia Jim Hardy Max Whitnall	Paul Elvstrøm (DEN) Malcolm 'Pip' Pearson (AUS)
1967 La Baule	France B. Moret R. Morch
1968 Kiel	France Marcel Troupel Philippe Lanaverre	France Yves Pajot Marc Pajot	France Marcel Buffet Daniel Nottet
1969 Buenos Aires	Great Britain Larry Marks Victor Deschamps
1970 Plymouth	Great Britain Larry Marks Victor Deschamps	Great Britain Gordon Wilson Philip Wilson	Great Britain Derek Farrant Robin Farrant
1971 Santa Cruz	Great Britain Derek Farrant Robin Farrant	United States Dave Vickland Pingree	Great Britain Peter Bainbridge
1972 Hanko	France Nicolas Loday Nicolas Fedorenko		Finland Kari Wilén Jyri Wilén
1973 Hong Kong	Great Britain Peter White John Davies	United States Dennis Surtees Stephen Owens	France Yves Pajot Yvon Kergreis
1974 Marstrand	France Yves Pajot Marc Pajot	United States Dennis Surtees Stephen Owens	Sweden Björn Arnesson Göran Andersson
1975 Hamilton	Great Britain John Loveday Lewis Dann	France Jean-Marie Danielou François Richard	France Marcel Buffet Thierry Desfarges
1976 Lake Macquarie	Great Britain Peter Colclough Steve Jones	Australia Terry Kyrwood Reg Crick	Australia R. Nonris I. Rors
1977 La Rochelle	Great Britain Peter Colclough Phil Brown	United States Ethan Bixby Larry Tuttle	United States Steve Taylor Stan Honey
1978 Copenhagen	Great Britain Peter Colclough Phil Brown	Denmark Jørgen Bøjsen-Møller Jacob Bøjsen-Møller	Australia Terry Kyrwood Reg Crick
1979 Durban	United States Steve Taylor David Penfield	United States Dennis Surtees Paul Cayard	United States Dan Thompson
1980 Hayling Island	United States Steve Benjamin Tucker Edmundson	United States Jon Andron Howie Hamlin	Great Britain Peter Colclough Harold Barnes
1981 San Francisco	United States Ethan Bixby Cam Lewis	United States Steve Benjamin Tucker Edmundson	Denmark Jørgen Schønherr Anders Kæmpe
1982 Cork	United States Gary Knapp Cam Lewis	Great Britain Peter Colclough Harold Barnes	United States Steve Benjamin Tucker Edmundson
1983 Adelaide	Australia Terry Kyrwood Reg Crick	Australia Gary Bruniges Greg Gardiner	Australia Geoff Kyrwood Bob Kyrwood
1984 Gromitz	Australia Dean Blatchford Tom Woods	Great Britain Peter Colclough Harold Barnes	United States Howie Hamlin Rick Rattray
1985 Enoshima	Australia Gary Bruniges Greg Gardiner	Australia Dean Blatchford Tom Woods	Great Britain Peter Colclough Harold Barnes
1986 La Rochelle	Great Britain Peter Colclough Harold Barnes	Sweden Krister Bergström Magnus Holmberg	Sweden Jan Bergström Bengt Zachrisson
1987 Helsinki	Sweden Krister Bergström Olle Wenrup	Denmark Jørgen Holm Finn Jensen	Australia Dean Blatchford Tom Woods
1988 Sydney	Sweden Krister Bergström Olle Wenrup	Australia Dean Blatchford Tom Woods	Australia Stephen McConaghy Andrew McConaghy
1989 Felixstowe	Sweden Krister Bergström Per Anders Hallberg	Great Britain Peter Colclough Phil Brown	United States Bruce Edwards David Shelton
1990 Kingston	Denmark Jørgen Schønherr Anders Kæmpe	France Philippe Boite Jean-Luc Muzellec	Sweden Krister Bergström Olle Wenrup
1991 Marstrand	Sweden Krister Bergström Per Anders Hallberg	Great Britain Ian Pinnell Mark Darling	Denmark Jørgen Schønherr Anders Kæmpe
1992 Santa Cruz	Australia Chris Nicholson Darren Nicholson	Denmark Jørgen Schønherr Michael Poulsen	United States Bruce Edwards David Shelton
1993 Travemünde	Great Britain Ian Barker Tim Hancock	Great Britain Paul Brotherton Bill Masterman	Denmark Jørgen Schønherr Michael Poulsen
1994 Durban	Australia Chris Nicholson Darren Nicholson	Great Britain Ian Barker Tim Hancock	Denmark Jørgen Schønherr Michael Poulsen
1995 Mounts Bay	Great Britain Jeremy Robinson Bill Masterman	Sweden Krister Bergström Thomas Moss	Sweden Ebbe Rosén Olle Wenrup
1996 Townsville	Great Britain Paul Towers Dan Johnson	United States Howie Hamlin Cam Lewis	Great Britain Ian Barker Daniel Cripps
1997 Gilleleje	Great Britain Mark Upton-Brown Ian Mitchell	Sweden Ebbe Rosén Olle Wenrup	United States Howie Hamlin Mike Martin
1998 Hyannis	United States Nick Trotman Mike Mills	United States Howie Hamlin Mike Martin	Great Britain Ian Barker Daniel Cripps
1999 Quiberon	United States Howie Hamlin Mike Martin	United States Andy Beeckman Ben Benjamin	Denmark Jørgen Schønherr Anders Kæmpe
2000 Durban	Sweden Krister Bergström Thomas Moss	United States Mike Martin Steve Bourdow	United States Howie Hamlin Peter Alarie
2001 Cascais	Germany Wolfgang Hunger Holger Jess	Great Britain Ian Pinnell Tim Hancock	Sweden Krister Bergström Thomas Moss
2002 Fremantle	Australia Chris Nicholson Darren Nicholson	United States Howie Hamlin Mike Martin	Sweden Krister Bergström Thomas Moss
2003 Malmö	Germany Wolfgang Hunger Holger Jess	Sweden Krister Bergström Johan Barne	United States Howie Hamlin Peter Alarie
2004 Santa Cruz	United States Morgan Larson Trevor Baylis	United States Howie Hamlin Peter Alarie	United States Mike Martin Jeff Nelson
2005 Warnemünde	Germany Wolfgang Hunger Holger Jess	United States Mike Martin Jesse Falsone	Germany Dietrich Scheder-Bieschin Reiner Görge
2006 Hayling Island	Great Britain Mark Upton-Brown Ian Mitchell	United States Howie Hamlin Jeff Nelson	Germany Jens Findel Johannes Tellen
2007 Adelaide	Denmark Jan Saugmann Morten Ramsbæk	United States Howie Hamlin Fritz Lanzinger	Australia Sandy Higgins Paul Marsh
2008 Palermo	Great Britain Ian Pinnell Carl Gibbon	United States Howie Hamlin Andy Zinn	Germany Wolfgang Hunger Julien Kleiner
2009 San Francisco	United States Mike Martin Jeff Nelson	United States Mike Holt Carl Smit	Australia Chris Nicholson Casey Smith
2010 Aarhus	Wolfgang Hunger (GER) Julien Kleiner (GER)	Jørgen Bojsen-Møller (DEN) Jacob Bojsen-Møller (DEN)	Ian Pinnell (GBR) Ian Mitchell (GBR)
2011 Hamilton Island	Wolfgang Hunger (GER) Julien Kleiner (GER)	Mike Holt (USA) Carl Smit (USA)	Sandy Higgins (AUS) Paul Marsh (AUS)
2012 La Rochelle	Jan Saugmann (DEN) Martin Görge (GER)	Jørgen Bojsen-Møller (DEN) Jacob Bojsen-Møller (DEN)	Christian Kellner (GER) Martin Schoeler (GER)
2013 Barbados	Class Lehmann (GER) Leon Oehme (GER)	Stefan Boehm (GER) Gerald Roos (GER)	Wolfgang Hunger (GER) Holger Jess (GER)
2014 Kiel	Mike Holt (USA) Rob Woelfel (USA)	Peter Nicholas (AUS) Luke Payne (AUS)	Wolfgang Hunger (GER) Julien Kleiner (GER)
2015 Port Elizabeth	Mike Holt (USA) Carl Smit (USA)	Ian Pinnell (UK) Johannes Tellen (GER)	Ted Conrads (USA) Brian Haines (USA)
2016 Weymouth	Mike Martin (USA) Adam Lowry (USA)	Mike Holt (USA) Carl Smit (USA)	Wolfgang Hunger (GER) Julien Kleiner (GER)

References

↑ http://www.int505.org/the-5o5/specifications
↑ "International 505". Outer Harbour Centreboard Club. Retrieved July 20, 2013.
↑ "Portsmouth Number List 2012". Royal Yachting Association. Retrieved 31 July 2012.
↑ "Centerboard Classes". US Sailing. Retrieved 31 July 2012.

External links

Wikimedia Commons has media related to 505 (dinghy).

Classes of World Sailing

Current Olympic classes	470 49er 49er FX Finn Laser Laser Radial RS:X Nacra 17

ISAF centreboard classes	29er 420 505 B14 Byte Cadet Contender Enterprise Europe Fireball Flying Dutchman Flying Junior GP14 Int. 14 Laser 2 Laser 4.7 Lightning Mirror Moth Musto Performance Skiff O'pen BIC OK Dinghy Optimist RS Feva RS Tera RS100 RS500 Snipe Splash Sunfish Tasar Topper Vaurien Zoom 8

ISAF keelboat classes	12 mR 2.4 mR 5.5 m 6 mR 8 mR Dragon Etchells Flying 15 Hansa 2.3 Hansa 303 Hansa Liberty H-boat J/22 J/24 J/70 J/80 Melges 20 Melges 24 Melges 32 Micro Platu 25 RC44 SB20 Shark 24 Soling Sonar Star Tempest Yngling

ISAF yacht classes	Class40 Farr 30 (Mumm 30) Farr 40 IMOCA 60 J/111 International Maxi Association Soto 40 Swan 45 Swan 60 TP 52 X-35 X-41

ISAF multihull classes	A-Class Dart 18 Formula 16 Formula 18 Hobie 14 Hobie 16 Hobie Dragoon Hobie Tiger Hobie Wildcat Nacra Infusion SL 16 Topcat K1 Tornado Viper F16

ISAF windsurfer classes	Formula Experience Formula Windsurfing Funboard Kona Mistral Raceboard RS:One Speed Windsurfing Techno 293

ISAF kiteboarding classes	International Kiteboarding Association

International Radio Sailing Association classes	10 rater A Class Marblehead One Metre

Former ISAF classes	11:Metre One Design 29erXX Aloha Buzz C-Class Division I Division II Division III Elliott 6m Farr 45 Farr Maxi One Design Hobie 17 Hobie 18 IOD ISO Laser Vago Lechner A-390 Mistral Junior Mumm 36 Nacra F18 Open 50 ORMA 60 Sydney 40 Ultimate 20 Windglider X-99

Sailing dinghy, Sharpie and Skiff classes

Dinghies under 10 ft	Frog Cape Cod Frosty El Toro Fatty Knees Fly Holdfast Trainer Manly Junior Minto Naples Sabot O'pen BIC Optimist P Class Pelican Puddle Duck Racer Sabot Starling Tadpole Topper Topaz Taz Turnabout Zoom 8

Dinghies under 15 ft	10ft Skiff 12 foot dinghy 125 ("One-twenty-five") 12ft Skiff 13ft skiff 29er 29erXX skiff 2000 3000 405 ("Four-oh-five") 420 Access Liberty Adventuress ASC Astus 14.1 Australian Sharpie B14 Banshee Beetle Cat Beneteau Wizz Bermuda Fitted Dinghy Blaze Blue Jay Bonito Bosun British Moth Butterfly Buzz Byte Cadet Cherokee Cherub C-Lark CL 14 Comet Coypu Dabchick Daring Dart Enterprise Escape Europe Envy Extra Farr 3.7 Finn Firefly Flying Ant Flying Eleven Flying Junior Force 5 GP14 Graduate Gull Heron Idle-along IDRA14 International Twelve International 14 Javelin (NZ) Javelin (US) Jet 14 Jollyboat (NZ) Lark Laser Standard Laser 2 Laser 3000 Laser 4.7 Laser 5000 Laser Funboat Laser Pico Laser Radial Laser Vago Laser Vortex Lido 14 Marlin Merlin Rocket MG14 Miracle Mirror Moth Musto Performance Skiff National 12 NS14 OK Dinghy O'pen BIC Otter Pacer Pegasus Penguin Phantom RS Feva RS Q'Ba RS Tera RS Vareo RS100 RS200 RS300 RS400 RS500 RS600 RS700 RS800 Sabre Scorpion Snark Snowbird (sailboat) Solo Spiral Splash Streaker Sunburst Sunfish Tinker Star Traveller Tinker Traveller Tasar Topper Topper Topaz Topper Topaz Magno Topper Topaz Vibe Topper Topaz Xenon Twinkles 10 & 12 Vagabond Vaurien Wanderer Weta Woodpussy Zeddie Zephyr

Dinghies under 20 ft	16ft Skiff 18 foot dinghy 18ft Skiff 470 49er 505 Albacore Beaufort Invitation Buccaneer CL 16 Comet Contender Corsair Day Sailer Fireball Flying Dutchman Flying Scot French National Monotype 1924 Hornet Interlake International Canoe Jacksnipe Javelin (Europe) Jersey Skiff Jollyboat (UK) Jolly Boat JY15 Laser 4000 Laser Bahia Laser Stratos Lelievlet Lightning M 16 Mirror 16 Mutineer 15 O-Jolle Osprey Payne-Mortlock sailing canoe Pirate Precision 15 RS K6 RS Vision RS700 RS800 Salcombe Yawl Sea Bright Sea Scout Standard Boat (BP18) Snipe Spanker Texas Tornado 12m² Sharpie Thistle Topper Topaz Omega Vanguard 15 Wayfarer Windmill Windy Winkle Brig X boat Y flyer

Dinghies 20 ft or over	Highlander M 20 Norfolk Punt

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