IRSA

Radiosailing

IRSA International Radio Sailing Association

IRSA is the worldwide radio sailing organization as an affiliated member of ISAF. IRSA is dedicated to the enhancement of both current and emerging world radio sailing classes through the promotion and development of consistent class rules, measurement methods, radio yachting racing rules and advice in running major racing build1events.

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What is Radiosailing 
World, Continantal Natinal Championships sport that can be enjoyed by young and old

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IRSA A Class

dBoats in IRSA A Class are not limited in length, but are controlled by a formula which balances waterline length, displacement, and sail area. Using this formula, sail area reduces as displacement reduces and as waterline length increases. The formula was devised in 1922 by Major Malden Heckstall-Smith, then editor of the Yachting Monthly, for testing an alternative to the International Linear rule. A similar rating rule is still in use today in the 5.5 Metre class rule which also uses elements of the Linear rule. Although A Class boats are of a heavy ‘type’ there is flexibility to create lighter hull forms which excel in brisker conditions. aNevertheless they are big boats compared with other rc classes and a fleet of A Class boats is an impressive sight. A modern A Class will usually be made using carbon fibre – hull, foils and spars.

The class was given Classic Class status in 2004. For full information concerning what this means please see the IRSA Regulations.

A Class documents (click to expand categories)

IRSA