Land yacht/sand yacht sail rigs?

hi does i am building a land yacht and need some information on sail rigs that other land yachts have. i need to know things like what material is the sail made out of? why is it in that shape? where is it hoisted from? where is the mast stepped? does the sail configuration work well into the wind? does it work well down wind?. if any one has any links to where i could find this info or know about any of this please tell. i am looking or about 5 to 6 different types of sail rigs.