Spinakker pole bridle question

[Matthew Sebring]

This is an end for end pole on a 33' boat (13'6" J measure) The bridles will go out to the ends, I'm mainly concerned about how long to make them so that they do their job well but don't have the rings too far above and below the pole.

[Brian Duff]

rings should be 15% of pole length off pole ( 1.5' on 10' pole)

get leg lengths by using http://en.wikipedia.org/wiki/Pythagorean_theorem

this will give a safe bridle for an average pole.