Oh Boy. Coefficients of Thermal Expansion!

The several degrees of extra heat captured by the black mast might come out to something
like a fiftieth or twentieth of inch expansion on a long mast. A bigger issue might be if
the mast is setup and tuned on a cold Spring day - the temp rise to a hot Summer day could
be 50 degrees, which might result in an expansion of maybe a part in 2000, which would be
around half an inch for a long mast. I think I'll ask my rigger if they take this into
account.

(These number are all SWAGs - Scientific Wild Ass Guesses)


"Bobsprit" wrote in message
...

Dumb people. My friend's Santana 30/30 has a black mast. On hot days we need to
use sails from a Rhodes 19 to get a proper fit. We usually have to change the
stays as well because the mast can change more 3' in height.

RB