Weights between 45 kg (100 pounds) - smallest and lightest and up to 200+ kg (450+) for large seagoing boats. Boat on Vladimir's photos in appx. 90 kg (200 pounds) AFAIR.
Why not to fly hull? May be not too high <img src="http://www.catsailor.com/forums/images/graemlins/smirk.gif" alt="" />

Also with trapeze:

But this boats are relatively underpowered compared with "rigid-hull". Usual racing classes are 7,5 - 8 - 10 -13 m2, so not often need to trapeze.