i used to have plans for a "jake chair" an adirondack chair kinda modified by some old guy years ago i think. the plan was made to make the perfect addirondack chair,wider arms,different slant to the back ect ect... my puter coocked a month or so ago, so i have no links to give you. but id guess asearch would help you.
good luck,and keep us posted

roy

im back,, here ya go

http://www.internetwoodworking.com/w5/chair.html

as i look at this chair again,,i now want to build a set even more than before. :-)