My Dad & I designed our flying hull trailer based on a design popular in the '70's.
Made completely out of alloy, it can be built using a hand drill and circular saw...no welding is needed (or recommended...reduced strength by destroying temper of the alloy).
The advantages of the design are that the boat can be carried tilted or completely dismantled (much better for long trips to save fuel), the boat can be stored on the trailer flat for mast up/drysail yards and the boat can be "floated off" the trailer for ramp launching...makes it possible to launch/recover completely single-handed.
I have used the original prototype for quite a few years now, doing 3 trips from Ventura, CA to Houston, TX, 1 trip to Miami & back plus many weekend excursions to Long Beach & San Diego.
More pics and assembly photos here:
Full Tilt Trailer Construction