September 2010 change to Class rules allowing the use of Main Cunningham.

International 420 Class Rules are published by ISAF on the ISAF website. This link takes you to the 420 Page.

Don O'Donnell's (ISAF Measurer) advice on buying 2nd hand boats

Fairly old (Rondar) general tuning guide

Direct link to Speed Sails Website

Taken from the Lenam website

A pdf taken from the Tony Tio website

Direct link to Allspars website

Matt Burge's beginner's guide on how much and when to Barber Haul the jib.

Matt Burge's guide on how to safely alter your mast rake between races

Matt Burge's beginner's guide on when and how much to use chocks to straighten the mast.

Matt Burge's beginner's guide on how to set up your mast rake

Matt Burge's beginner's guide on setting up your spreaders

Matt Burge's beginner's guide on setting up and getting the Mainsheet Bridle the right length.

Matt Burge's General Summary of Rig Settings for beginners.

A pdf taken from the Toni Tio website listing their range of Sail Models

Bow numbers shall be fixed to both sides of the bow as illustrated. If a bow number becomes lost or damaged so that in the opinion of the Race Committee it is unclear or unreadable it must be replaced before the first race of the following day. Numbers used must be from digital 8s, 24cm (10") in height.

Numbers should be positioned:
* Within the first 600mm of the hull;
* 150-200mm from the bow
* 50-75mm below the gunwale
* top edge parallel to the gunwale
* 25-50mm gap between digits.
It is usually easiest to use one of the offcuts from the digital 8 as a spacer.

Numbers are allocated by the Class, usually to the Helm. Provided you sail at a minimum of 1 class major event each year, the number will remain with you whilst you remain a member of the class. If you do not have a bow number, please contact the Results Officer.

Measurers are approved by the RYA - for the current listings of Full, Maintenance and Sail Measurers, click above,

The 420 is an established worldwide performance two person trapeze and spinnaker racing dinghy.

There are 56,000 worldwide. This popular dinghy is sailed at school, club, open, national and international levels. There are many second hand boats available, active clubs and excellent tuition for all levels.

Built in buoyancy tanks make the boat very safe even when inverted. The 420 is the youth development boat in 43 countries around the world and is the ISAF Youth World Championship boat. Despite the emergence of newer commercial driven classes and asymmetrics, the 420 is still the world's top youth training boat.

Length 4.2 m

Beam 1.63 m

Mast 6.26 m

Sails Main 10.25m2, Jib 2.8 m2, Spinnaker 9 m2.

Bare hull weight 80 kg min

Sailing weight 100 kg min

The ideal competitive combined crew weight is 17 to 23 stone (110-145Kg).