Author: <span>EC Publicity Officer until 2022</span>

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 …

IRSA A Class

Boats 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 …

IRSA