J/30 Class Association Forums J/30 Forum One Design Class Rules Mast Step Postion

Don ... it appears that geometrically unless we are at 25 mm setback and solid back at partners ... we will be unable to reach target headstay length ... and have anywhere near enough tension to hold up a RF to work well. You should be just able to do it, considering that -1/8 in. probably is good to kick up forestay tension for a heavier foil. There is only so much tension we can use to pull the mast back with the uppers ... I don't like going over 35s.

Tomorrow we will be resetting #505's forestay as I just didn't realize how critical that mast step measurement is in limiting the adjustablity of the forestay.

I will measure what the forestay with a RF >>>HAS TO BE to look right for a 40mm setback and post.
We are in middle of season here and I am not up to pulling mast to reset this year.

Photo of mast full aft in partners:
[we use cedar shingles wrapped with shrink tape to lock mast position.
Same, same close to 11'6" locked back trying to measure over deck stuff.]