Wantoo:

  Wantoo is a great design.  I forgot about that one.  Thanks for the reminder.

  As with the scissors and the Expeditionarry, it has the added advantage of beams that don't have to be parallel.

  It's got too much windage for me, but other than that, I'd say it's equal to the scissors.  Apples and organges -- one one hand, the scissors will be sleeker and lower, on the other, Wantoo has those rails if you want them.  There's a lot to be said for keeping people on the boat, and/or making the boat friendly for those who are less mobile.

  While the design is technically unproven, it's simple enough for me to be comfortable using it if I were to want the rails.  Very well thought-out.


Expeditionarry:

  Thanks again.  I must have had a brain cramp on Expeditionarry;  I remembered it having the pinned tapered beams. 

  This would be the simplest and lightest design if you want to launch the boat in minimal time with minimal people.  No need for multiple trolleys, lots of space, or feats of strength.  Expeditionarry would be my design of choice if I gave up wanting to fold on the water. 

  It would probably also allow for more cockpit and solid deck without blowing the wide load requirements.

  Though I'm not sure about how high it would get if scaled up to a 48' leeward hull length.  I'll have to look at the drawings again.

---

  This was a great post.  I may have been arguing for my favorite design, but I was also serious about other options as well.  Depending upon your requirements, I think both of these are good replacements for the scissors.

        - Mike

 

To complete I would add

Wantoo

pros

- uses mast stubs to hinge on

- allows rudder boards on the beams

- doubles as a rail

- strong tube structure

- hulls upright

cons

- unproven

- windage

- complexity of three axis of rotation per beam

HP expeditionary

pros

- two axis of rotation

- deck part of supporting structure

cons

- unproven

- lw hull canted