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 10 Rater
View Rule Doc
www.theamya.org/10-rater.html

Class Type: Developmental
The 10 Rater is a medium to large size developmental class yacht with a reputation for speed. Also recognized by AMYA as an International class, worldwide support for this graceful yacht promotes racing and design advancements on the very leading edge of performance. The name "10 Rater" refers to the formula used to determine the legality of boats within this class. If, after working through a formula, you arrive at a number of "10" or less, then you have a boat that fits into the 10 Rater class.

The 10 Rater class of model yachts is based on the length by sail area rule of 1887. Shortly after this rule was adopted for rating full sized yachts, model builders began using the rule as a foundation for new boat design. The 10 Rater class is unique in its method of "rating" yachts, where the only two parameters that matter are waterline length and total sail area. However, as each parameter contributes toward boat speed, their relationship may only change inversely: as one goes up, the other must go down. This allows 10 Raters to be highly specialized for local performance, or in the most extreme sailing conditions worldwide. The present 10 Rater class-rating rule allows builders the greatest freedom to experiment with performance improving design and technology.

With such latitude allowed in boat design, the tradition of constantly evolving design innovations and construction materials continues today. The "rigs" on 10 Raters are not limited only to soft sails, but may use rigid wings, or a combination of soft sails on wing masts. Each of these performance enhancements is not overlooked, and is counted toward the total sail area; while no design or material restrictions are imposed, no free areas are given either. The result of this unique rating method is an unparalleled efficiency with which 10 Raters extract power from the wind. Below these powerful rigs, 10 Rater hulls are open to experimentation as well. Hull construction materials and techniques are often hi-tech and state of the art, although modern wood construction may still be used to produce competitive yachts. The greater emphasis is on design innovation, with a steady stream of new ideas coming from the drawing boards of both amateur and professional designers. Builders have many choices of plans and modern kits available to suit their local waters. Prices are reasonable, given the high performance and durability of these products. The added value of over 100 years of progressive development that is built into every 10 Rater, is not available in any other class.

Being one of the fastest and most technically demanding of all monohull model yacht classes, the 10 Rater is not a beginner's boat. It is more the "Major League" of the sport of model yacht racing. This gives the Class a relatively small population in local areas, but a worldwide popularity among veteran skippers who enjoy the challenge of competing at the highest level. With the recent introduction of several entry-level model yacht classes, more skippers are discovering the sport than ever before. As many of these new sailors are already looking for greater challenges, there has come a renewed interest in the advanced classes, like the 10 Rater. This has created some new fleets and promoted the growth of existing fleets, which insures the 10 Rater class a bright future to match its long and illustrious past.
 36/600
View Rule Doc
www.theamya.org/36600.html
http://www.36-600.com/
Class Type: Developmental
The 36/600 is one of the largest classes certified by AMYA, with nearly 1500 boats registered since its introduction in 1971. Some of the contributing factors for the 36/600's national popularity is that they are economical to build, easily transported, and a genuine pleasure to sail.

The 36/600 is a developmental class, so there are very few restrictions beyond the thirty-six inch hull length and six hundred square inches of sail area. The class specifications are so worded to encourage the designers and builders to fully utilize their imaginations. Design diversity for 36/600 hulls is quite broad. For example, beams range from a narrow five inches to over eight inches. Sail aspects range from forty-five inch luffs to over sixty inch luffs. The weight of a 36/600 can vary from under five pounds to over eight pounds. Though there is usually a commonality of boats sailed by a club, it isn't unusual to have most of the boats quite different in design. This gives a skipper the option of exercising their judgment of which design is best for the the prevailing conditions at their sailing venue.

The sailing characteristics of the 36/600 are well suited for both the experienced skippers and the beginner. For a novice skipper, the 36/600's size and simplicity makes understanding the boat and what makes it go quite easy. For the veteran skipper, the quick response and "on the edge" speed makes the 36/600 an ideal choice for competitive sailing.
 AC
www.theamya.org/boats/ac/

Class Type: One Design
The AC class yacht is the largest of the development class yachts, being 1/12 scale versions of the full-sized America's Cup class yachts. This development class allows variations in length, sail area and displacement based on a formula. These swift and agile yachts provide for close racing. Approx. 75" long.
 American Marblehead
View Rule Doc
www.theamya.org/american-marblehead.html

Class Type: Developmental

​The M or Marblehead Class, sometimes called the "50/800", is a medium size high performance development class. It's original concept in the 1930's was to produce the largest model that would conveniently fit in the standard American car of the time. The class is a development class with the main restrictions being a hull length of 50 inches and a sail area of 800 square inches. The class has been highly developed over the years to produce a high performance model that can be sailed in a wide range of conditions, assuming the owner has the appropriate rigs. Today's M weighs around ten pounds and carries an 85 inch rig in most conditions. The hull and rigs tend to use advanced materials and techniques. Boats are available from several suppliers who can provide them from basic kit form to fully assembled. There is also an active used boat market at the local level.

The M Class has a large base, with over four hundred competitive models in existence. It is sailed in most areas of the country. Competition is available from club level to national level, and even international level. As an international class with the same rule as the rest of the world (except the measurements for AMYA are in inches and pounds), AMYA members can attend regattas abroad. They can also take advantage of several excellent foreign suppliers.

When you are looking for a class to enter, look at the M Class. It has much to offer.

 Canterbury J
View Rule Doc
www.theamya.org/canterbury-j.html

Class Type: One Design

The Canterbury J originated in Christchurch, New Zealand, based on the J Class Ranger. A 48 inch Fiberglass hull and lead Keel both made from Class molds. Everything else can be made by the builder. Total weight of ready to sail boat is 14lbs 5oz.

 Columbia 42
View Rule Doc
www.theamya.org/columbia-42.html
http://www.columbia42.com/
Class Type: One Design

The Columbia 42 is a semi-scale 12 meter model of the Sparkman and Steven's designed winner of the America's Cup. This boat was generally accepted as the best sailing of the 12's and also the best looking boat on the water.

The development mission for this new class was to "create a good-looking, good sailing boat that can be moved between home and pond fully-rigged, and can handle summer pond weeds that hang up most blade keel boats". The boat weighs just under 10 lbs and has a draft of 8 1/2".

The Columbia 42 is a new One Design addition to the AMYA fleet. It's design mission was to develop an attractive boat (1) that sails well, (2) can be transported to/from home fully-rigged, and (3) can sail in weed conditions most boats can't (thanks to its smooth underbody). The finished product is a semi-scale model of Columbia - the famous 12 meter that won the 1958 America's Cup with Briggs Cunningham at the helm. The keel on the model is 1 1/2" deeper than the original scale. A total of 13 developmental boats are grandfathered - 3 fiberglass and 10 with plastic deck inserts (rather than lighter birch plywood).

to Purchase a boat http://www.columbia42.com/

 CR 914
View Rule Doc
www.theamya.org/cr914.html
http://cr914class.com/
Class Type: One Design

‚ÄčThe 914 millimeter long CR 914 is based on the original design of the International America's Cup Class. Because the CR 914 is relatively inexpensive and can be purchased fully built or can be assembled from a kit without special skills or tools, it qualifies as an entry-level class. A high performance racing machine that accelerates quickly, turns on a dime and points like a tour guide. It sails well in an extremely wide range of wind velocities, without having to use multiple rigs for light and heavy air like some other classes must do. Weighing only 6.25 pounds and carrying 658 square inches of sail area, it ghosts amazingly well in the lightest of air. Ballasted by over three pounds of lead in the streamlined bulb at the end of its deep fin keel, however, this remarkable little boat readily handles a 20 knot wind and can keep racing in gusts to 30 without shortening sail.

The hull and deck are cast as one piece of ABS plastic. The high-aspect-ratio foil-shaped rudder and keel fin are molded with their shafts installed. The spars are made of aluminum tubing, the keel bulb is a shaped lead casting, and the sails are dye-cut from lightweight rip-stop polyester spinnaker cloth. Kits come from the US distributor with complete electronics, a boat stand, epoxy and cyan acrylic glue, and an "upgrade package" that has been developed in the United Stares to overcome a few minor shortcomings in the original kit that were identified early in our experience with the boat. You get all the parts, reinforcing materials, fasteners and everything else you need to build and sail the CR 914 except sandpaper and batteries. Oh, yes, before you can go sailing you also need some water. Kits, partially built boats, finished boats ready to sail, and boats with custom paint jobs and special graphics can be ordered from the US distributor, Chesapeake Performance Models, which also carries a full line of parts and accessories.

 DragonFlite 95
View Rule Doc
www.theamya.org/dragonflite-95.html
https://dragonflite95.us/
Class Type: One Design
The DragonFlite 95 is a Restricted One Design boat that is meant to compete within a strict set of rules to ensure a true test of a skipper's ability to tune their boat and race it well. Additionally, this 950mm boat is of high quality for a modest price. The DF95 is sold ready to race which includes transmitter and receiver, just add AA batteries. For those already in the hobby, a boat without transmitter and receiver can be purchased. The DF95 comes with a carbon fiber keel, Mylar sails, and a one piece carbon mast, all cutting edge components. It can be on the water in a few hours and assembled by a person with no experience building boats.
 DragonForce 65
View Rule Doc
www.theamya.org/dragonforce-65.html
https://dragonforce65.us/
Class Type: One Design
The DragonForce 65 is the fastest growing class of RC sailboats in the U.S. The boat has earned this distinction by being a great one-design sailing boat while being the least expensive ready-to-sail boat on the market. At around $300 for a boat with radio and receiver and about 2 hours of assembly and you're on the water.

The boat has fleets at nearly 100 clubs around the country. The clubs range from well-established AMYA clubs, full sized boat yacht clubs, school sailing teams to community association clubs. Within these clubs the boat is sailed from beginners to national champion skippers from many other classes.

An added benefit of the boat is the well-supplied and dedicated national distributor that provides excellent access to boats, parts and accessories allowed by the class rules.
 EC-12
View Rule Doc
www.theamya.org/ec-12.html
http://www.ec12.org/
Class Type: One Design

The EC-12M is one of the one-design classes comprising the AMYA-recognized fleet. Class specifications govern virtually every aspect of these yachts from hull and sail design to permitted remote controlled functions. Approximately 5 feet long, with a mast standing about six feet over the deck, the EC-12M weighs in at about twenty-three pounds.

Originally a towing tank model for a Charley Morgan twelve meter, the EC-12M can be transported in all but the smallest of cars, sailed in shallow waters, and in winds from mere zephyrs to light gales. The hull is shaped so as to shed dead leaves and other flotsam, an important feature when sailing on inland lakes and ponds.