J/30 Class Association Forums J/30 Forum One Design Class Rules Class Rules & #1 Genoa Size Limits

From the Class Rules. These are the only specified dimensions in paragraphs 5.12.2.2, 5.12.2.3 and 5.12.2.4. The luff and foot are implied by geometry. Para 5.10.2 has the measurement band on the outer end of the boom at 13 feet. Refer to the ISAF Sail Measurement Guide on how to interpret.

Mid Point Leach to Luff 2621mm which converts to 8 Ft 7.2 in

Leach 12395mm which converts to 40 Ft 8.0 in

Max Headboard Extended from Mast 158mm which converts to 6.2 in

If you look at the J/30 Mast drawing at the bottom of the J/30 Specifications the distance between the upper and lower measurement band on the mast (P dimension) is 11582mm which converts to 38 ft