The U.S. One Meter Class

As Featured in Model Yachting Issues #119, #149 and #172

Colin Mosgrove
Colin Mosgrove, 2018 US1M National Champion

Class Secretary
Stephen Vaczovsky
9226 Cape May Ct.
Elk Grove, CA 95758
209 938-9970
Class Administrator
Jim Linville
57 Edgewater Road
Hull, MA 02045-2762
781 925-0045

The results of the voting on the class rule change motions are now available by clicking on the top center box in the Links section on this page.

Basically, NONE of the ballot motions received the required 50% + 1 to add, change or amend any of the existing rules so they remain as they were prior to the voting, as printed below.

If you have any specific questions, you can contact me at us1m@theamya.org.

Steve Vaczovsky
US1M Class Secretary

U. S. ONE METER CLASS DESCRIPTION

The U.S. One Meter Class is a developmental class, which means there are very few design restrictions. The basic design restrictions include, overall hull length, keel depth and sail area (see class specification for the few remaining restrictions). The unrestrictive nature of the specifications, encourages one of a kind Home Built yachts. The hull can be self designed or built from plans, and easily planked from wood. Or you can purchase a kit, or complete boat from one of several suppliers. The structure of the class specifications allows the designer/builder to experiment with a design, and then try it out on the water.

The One Meter yacht is light weight, very fast and responsive to the controls. It is a fun boat to sail. And inexpensive two channel radio is required for control of sails and rudder. The boat is easily disassembled and fits in a small size automobile, for transporting to the pond or lake. The U.S. One Meter class is one of the least expensive classes for the new skipper, just starting in the hobby of R.C. sailing.

U. S. One Meter Class Rules

As Amended on January 1, 2017

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1.0  HULL

1.1   LOA (including bumper, if used) 39-3/8 maximum, 39” minimum, mono-hull.           

2.0  SAILS

2.1  Maximum sail area 600 sq. in measured inside the combined primary sail measurement triangles of both the main and jib (must have main and jib) excluding the free roach provision of Section 2.2 and 2.3.  Any part of the sail outside of the primary sail triangle(s) shall be considered as roach or foot and must conform to Sections 2.2.2, 2.2.3, and 2.3.2 for the written rules and the control drawing.  Non-triangular sails, such as (but not limited to) square heads, square sails and gaff rigs shall be measured as two or more triangles, and shall not exceed 600 square inches (excluding the free roach provision of Sections 2.2 and 2.3).

2.2  Mainsail:

2.2.1     Luff - 60” maximum and 3/4” maximum across top (see drawing), including headboard if used.

2.2.2     Roach - 2-1/2” maximum measured from corner of clew to top of sail as shown in control drawing.

2.2.3     Rounded Foot - 1” maximum

2.2.4     Battens - Two times measured maximum roach.  Four battens permitted (maximum)

2.3   Jibsail:

2.3.1    Roach 1-1/2” maximum and 1/2” across the top (see control drawing), including headboard if used.

2.3.2    Rounded Foot - 1” maximum

2.3.3    Battens - Two times the measured maximum roach. Three permitted (maximum).

 

2.4    Registration Numbers

2.4.1   Registration numbers shall be of a highly contrasting color and at least 3 inches in height and 3/8 inches thick.

2.4.2   Registration numbers shall be located in the upper half of the mainsail on both port and starboard sides of the main sail with the starboard number on top.

2.4.3   Registration numbers on the jib are optional.  If used, they shall conform to 2.4.1 and be located in the lower third of the jib.

2.4.2   At the owner’s option, the displayed registration number may consist of the last two or three digits of the registration number assigned by the class secretary.  There should be space allowed in front of the sail numbers to add the prefix “1” when required.

2.4.5   All registration numbers on sails manufactured before July 4, 2015 are grandfathered. 

            

3.0  MAST

3.1       Mast height above deck 65” maximum.

3.2       Mast diameter 3/4” maximum

3.3       Masts that rotate or mechanically cant/pivot from side to side are prohibited.  However, masts that rake or bend fore or aft for the purpose of tuning are not prohibited

4.0  BOOM

4.1                Boom and club diameters 3/4” maximum.

4.2       For the purpose of the US One Meter Class Rules a single counter balancing weight for a jib boom is not considered shifting or movable ballast, but more than one counter or balancing weight is prohibited.

5.0  RADIO

5.1                 Radio control - four functions maximum.

 

6.0  RUDDER

6.1                 Rudder must be aft of keel fin.

 

7.0  KEEL

7.1                            14-1/4” length maximum, measured as shown in the control drawing.

 

8.0  PROHIBITED

8.1       Multi hull and outrigger configurations, movable keels, shifting and/or movable ballast, bilgeboards and/or bilgekeels, tunnel hull, trim tabs, rotating mast, wing sails, hydrofoils and other appurtenances that raise the hull out of the water.  For the purpose of this Section, batteries are not considered shifting and/or movable ballast.

8.2       Any form of platform or pedestal, as of wineglass shape, which increases keel depth, except as noted on the control drawing (1989).

9.0  LOGO

9.1                             Class logo to be displayed in the upper third of the mainsail (see control drawing).

 

10.0  SPECIFICATIONS

10.1 Per attached drawings.