IRSA A Class

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Status of Class: IRSA

Boats in this IRSA A class are not limited in length, but are controlled by a formula which demands a balance between waterline length, displacement and sail area. Sails get smaller as displacement reduces and as waterline length increases. The formula was devised in 1922 by the editor of the Yachting Monthly as a testing ground for later use in the full sized 5.5 Metre class rule. A fleet of  ‘A Class’ boats is an impressive and awesome sight.

Gosport is the home of the famous A Class yachts and the Model Yachting Association A Class Championships were always held at the Walpole Lakes from 1923 until 1933 when Fleetwood constructed its boating lake.

  • A Class GBR Events here
  • A Class International Events here
  • Contact the A Class Captain here
  • A Class website (IRSA) here
  • A Class GBR website here
  • A Class Rules here
  • A Class Measurement Forms here
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