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Since 2004 The Half Ton Class Europe is guiding the revival of the former IOR half tonners. Half tonners are 9m long sailing vessels, build to the IOR rating rules from 1967 to 1992. A boat is considered as a 'half tonner' if it fulfills the following requirements: • if it has been designed & build as a prototype one-off in the period between January 1st 1967 and December 31st 1994, and • if it has been once eligible to participate at an edition of the IOR Half Ton Cup, and • if no alterations have been made to the hull of the boat (except keel & rudder). Every production boat derived from the hull of a prototype one-off half tonner will also be considered as a half tonner.
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- Albin Ballad
The Albin Ballad 30 Sailboat
The Albin Ballad 30, a moderate-to-heavy displacement masthead sloop, was designed by Rolf Magnusson and built in Sweden by Albin Marine.
The Ballad 30 was designed as an International Offshore Rule (IOR) Half Ton class cruiser-racer, which means it was optimized for racing under a handicap system that measured various aspects of the boat's speed potential.
The design is an evolution of the Joker S30 IOR racer. The Ballad 30 was very successful in racing, winning several national and international championships in the 1970s.
Published Specification for the Albin Ballad 30
Underwater Configuration: Fin with skeg-hung rudder
Hull Material: GRP (fibreglass)
Length Overall: 29' 11" / 9.12m
Waterline Length: 22' 7" / 6.88m
Beam: 9' 8" / 2.95m
Draft: 5' 1" / 1.55m
Rig Type: Masthead Sloop
Displacement: 7,276lb / 3,300kg
Designer: Rolf Magnusson
Builder: Albin Marine (Sweden)
Year First Built: 1971
Year Last Built: 1982
Number Built: 1500
Owners Association: UK Ballad Association
Published Design Ratios for the Albin Ballad 30
Sail Area/Displacement Ratio: 16.1
Ballast/Displacement Ratio: 47.0
Displacement/Length Ratio: 282
Comfort Ratio: 22.1
Capsize Screening Formula: 2.0
read more about these Key Performance Indicators...
Summary Analysis of the Design Ratios for the Albin Ballad 30
The Albin Ballad 30 sailboat, based on the published design ratios, would theoretically have the following sailing characteristics:
- Sail Area/Displacement Ratio (16.1) : This ratio falls within the range of 16 to 20, indicating that the Albin Ballad 30 would have reasonably good performance. It should be able to move well in most conditions, but it might not be as high-performing as boats with a ratio above 20.
- Ballast/Displacement Ratio (47.0) : This high ratio suggests that the Albin Ballad 30 is a stiffer, more powerful boat that can stand up well to the wind. However this ratio doesn't account for the location of the ballast. If the ballast is located in a shallow draft keel, the boat will be less stiff than if the ballast were in a bulb at the foot of its keel.
- Displacement/Length Ratio (282) : This ratio falls within the range of 275-350, indicating that the Albin Ballad 30 is a heavy displacement boat. It would require more power to drive the boat to its design hull speed compared to boats with a lower ratio.
- Comfort Ratio (22.1) : This ratio falls within the range of 20 to 30, suggesting that the Albin Ballad 30 would have a motion normally associated with a coastal cruiser. It should provide a reasonable level of comfort for the crew in most conditions, but it might not be as comfortable as boats with a higher ratio in rough seas.
- Capsize Screening Formula (2.0) : This value indicates that the Albin Ballad 30 has blue water capability and if properly equipped is suitable for ocean passages. The lower the value, the better the boat's stability and resistance to capsize.
As for the theoretical nature of these ratios, it's important to remember that they are simplifications and don't capture all aspects of a boat's performance or comfort.
For example, the Ballast/Displacement Ratio doesn't account for the location of the ballast, which can significantly affect a boat's stiffness.
Similarly, Ted Brewer's Comfort Ratio favors heavy displacement, narrow-beamed vessels with long overhangs. As a result, today's lighter-displacement, beamy cruisers with plumb bows won't score well for crew comfort according to this ratio, even though they may have bluewater capability.
These ratios should therefore be used as guides rather than definitive measures of a boat's characteristics.
Other sailboats in the Albin range include:
Dick McClary wrote this article, and used GPT-4, OpenAI’s large-scale language-generation model, as a research assistant to develop source material. The author wrote the final draft in its entirety and believes it to be accurate to the best of his knowledge.
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Design № 54
1/2 Ton IOR Racing Sloop
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Designed in 1975, Design No. 54 was detailed for fiberglass construction in New Zealand and Japan, in wood volume production for Bermester of Germany (who also built Design Nos. 51 and 53), and in wood as a stock plan for one off construction.
Closely related to Design Nos. 51 and 53 (1 Ton and 1/4 Ton designs) Design No. 54 was developed to be competitive in 1/2 Ton IOR events. This boat is Farr's most popular 1/2 Ton design, with over 50 boats built, and racing/cruising production versions - the Farr 920 - are still being produced.
Upstaged in light airs at Grand Prix events by the centerboarders of 1976/77 (Design No. 65), Design 54 is still a fast all around boat accumulating a long string of good performances at club racing level. If it had not been for the centerboard boats taking advantage of the Rule loophole, Design 54 would have been destined for bigger successes at a more international level.
Although originally designed as a full blown racer, many have been fitted out with cruising or cruising/racing interiors and form the basis of some good One Design club racing.
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Description
9.140 m/30'30"
7.150 m/23'6"
3.053 m/10'0"
1.588 m/5'3"
866 Kg/1,909 Lbs
2220 Kg/4,894 Lbs
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Farr Yacht Design
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- CLASSIFIEDS
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Half Tonner
Since 2004 The Half Ton Class Europe is guiding the revival of the former IOR half tonners. Half tonners are 9m long sailing vessels, build to the IOR rating rules from 1967 to 1992. A boat is considered as a 'half tonner' if it fulfills the following requirements: • if it has been designed & build as a prototype one-off in the period between January 1st 1967 and December 31st 1994, and • if it has been once eligible to participate at an edition of the IOR Half Ton Cup, and • if no alterations have been made to the hull of the boat (except keel & rudder). Every production boat derived from the hull of a prototype one-off half tonner will also be considered as a half tonner.
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Nicholson 1/2 Ton
Nicholson 1/2 Ton is a 29 ′ 11 ″ / 9.1 m monohull sailboat designed by Ron Holland and built by Camper & Nicholson starting in 1977.
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)
Same hull design as the more cruising oriented NICHOLSON 303 as well as the FAST 303, built in Brazil. Thanks to David S. for providing corrections and additional information.
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COMMENTS
Since 2004 The Half Ton Class Europe is guiding the revival of the former IOR half tonners. Half tonners are 9m long sailing vessels, build to the IOR rating rules from 1967 to 1992. A boat is considered as a 'half tonner' if it fulfills the following requirements: • if no alterations have been made to the hull of the boat (except keel & rudder).
A Scampi boat, production version of the Half Ton Cup winner by Peter Norlin. Half Ton class was an offshore sailing class of the International Offshore Rule racing the Half Ton Cup between 1967 and 1993. History. In order that yachts of different types can race against each other, ...
Half ton class europe . Way back in the Seventies and the Eighties the IOR racing rule produced exciting racing in various classes, with the Half Ton Class as very probably one of the most emblematic ones. With many hundreds of prototypes built in that era, and the thousands of series boats like f.i. the Arpège, Armagnac, Super Arlequin, Rush, Hustler SJ30 & 32 and the First Evolution, it is ...
Racer sailing vessels for sale on YachtWorld are available for a swath of prices from $5,903 on the lower-cost segment of yachts all the way up to $2,990,816 for the more lavish boat models. 171 listings. Find Sail Racer boats for sale in your area & across the world on YachtWorld. Offering the best selection of boats to choose from.
Racing. PHRF. 162-192. [ edit on Wikidata] The Scampi 30 is a family of Swedish sailboats that was designed by Peter Norlin as an International Offshore Rule (IOR) Half Ton class cruiser - racer and first built in 1970. The design was Norlin's first and proved to be both a sail racing and commercial success.
A limited edition, semi-custom 1/2 ton racer with flush deck and stripped interior. First boat was 'SuperStar', (Hans Fogh, 7th at 1/2 ton cup, 1976, Trieste). ... Many designers figure displacement when half loaded with stores, liquids and crew. Some report light displacement which is the weight of the hull and permanent equipment but with ...
Sailboat collection. Last update: 3rd April 2020. Half Ton class is an offshore sailing class of the IOR (International Offshore Rule). 9 sailboat specifications, between 29 ft (8.8 m) and 31 ft (9.3 m), are available in the Half Ton class collection on Boat-Specs.com: Sailboats. First built hull.
The Albin Ballad 30. The Ballad 30 was designed as an International Offshore Rule (IOR) Half Ton class cruiser-racer, which means it was optimized for racing under a handicap system that measured various aspects of the boat's speed potential. The design is an evolution of the Joker S30 IOR racer. The Ballad 30 was very successful in racing ...
This boat is Farr's most popular 1/2 Ton design, with over 50 boats built, and racing/cruising production versions - the Farr 920 - are still being produced. Upstaged in light airs at Grand Prix events by the centerboarders of 1976/77 (Design No. 65), Design 54 is still a fast all around boat accumulating a long string of good performances at ...
halftonclass.eu. Half Ton Cup (IOR) held between 1967 and 1992. New 'Classic' event beginning in 2003. Source: sailboatdata.com / CC BY. Suggest Improvements.
Hustler 32 is a 32′ 3″ / 9.9 m monohull sailboat designed by Stephen Jones and built by Verl Yachts (UK) between 1978 and 1983. ... Half Ton Class # Built 27 Hull Monohull Keel Fin Rudder Spade ... IOR 1/2 ton. (Prototype was 'Smokey Bear', 2nd at Poole, UK, 1978) Also called VERL 32.
halftonclass.eu. Half Ton Cup (IOR) held between 1967 and 1992. New 'Classic' event beginning in 2003.
Half Tonner. Since 2004 The Half Ton Class Europe is guiding the revival of the former IOR half tonners. Half tonners are 9m long sailing vessels, build to the IOR rating rules from 1967 to 1992. A boat is considered as a 'half tonner' if it fulfills the following requirements: • if it has been designed & build as a prototype one-off in the ...
Bes 1/2 Ton is a 31′ 5″ / 9.6 m monohull sailboat designed by Paul Elvström and Jan Kjærulff and built by Gouteron (Chantier) starting in 1972. ... AKA ELVSTRON 1/2 TON. Based on 'Bes', winner of Int. Half Ton Cup of 1972 - (held at Mastrand, DEN, sailed by Paul Elvstrom.)
The Sun Fast 1/2 Ton, also called the Jeanneau 1/2 Ton, is a French sailboat that was designed by Tony Castro as an International Offshore Rule Half Ton class racer and first built in 1984.. The Sun Fast 1/2 Ton's prototype was named Sun Fast and the design was the first boat in the Sun Fast sailboat range.. The even though only ten boats were built, the design was developed into the Arcadia ...
AKA ELVSTRON 1/2 TON. Based on 'Bes', winner of Int. Half Ton Cup of 1972 - (held at Mastrand, DEN, sailed by Paul Elvstrom.) Boats with more conventional decks, (with or without coachroof) such as ELVSTROM 32, BLUE DANE 32, BLUE LETH 32 seem to all have derived from this hull design.
The C&C 1/2 Ton is a small racing keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, an internally-mounted spade-type rudder and a fixed fin keel. It displaces 6,400 lb (2,903 kg). [1] [2] [4] The boat has a draft of 5.33 ft (1.62 m) with the standard keel. [1] [4]
This boat builder presents a variety of hull types: deep vee and other. These hull variations are commonly employed for cherished and time-honored on-the-water activities like a variety of commercial and recreational boating activities. Peterson equips models listed with inboard drive power options, available with diesel propulsion systems.
Length: 28 Year: 1991 Asking: $78,000. 25' SEAWARD 25. Very nice, clean, 1998 Seaward 25 sailboat with Yanmar 9 HP diesel engine, main sail & 155 genoa on roller furler, roomy interior, and great for cruising. Boat has shoal keel, wheel steering, very stable and a great choice for your first or move-up sailboat.
Nicholson 1/2 Ton is a 29′ 11″ / 9.1 m monohull sailboat designed by Ron Holland and built by Camper & Nicholson starting in 1977. ... Half Ton Class # Built 28 Hull Monohull Keel Fin ... 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 ...
The SCAMPI was Peter Norlins first yacht design. It's hard to think of a case where the first effort of any designer achieved similar success. The prototype, (by convention, referred to as the MKI,) trounced the competition at the half ton cup of 1969 (sailed under the RORC handicap rule). After going into production, this […]
Half Ton Class: Download Boat Record: Notes. Same hull design as the more cruising oriented NICHOLSON 303 as well as the FAST 303, built in Brazil. ... A Ballast/Displacement ratio of 40 or more translates into a stiffer, more powerful boat that will be better able to stand up to the wind. Bal./Disp = ballast (lbs)/ displacement (lbs)*100
40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.