Jake,
that video of Hydraplaneur is just awesome! stuff like that is really inspirational ......

and yes, you pegged it, those are prindle 16 hulls and will be my development boat where I can pretty much do anything I want to it testing out ideas and features and not care much if I mess things up a bit.

An example of that is multiple mast placements. For long stretches of single tack I could have the masts staggered? It's an idea, one of many ......

but back to the width subject, for the 16' of the prindle, then 8 is pretty much ideal then? my next boat I'd be shooting for 18' hulls I'd think, and preparing to have a crew member along.

I'm glad you liked the portage test, as crude as it was, it worked well. Video can really tell the story huh? so 16' was pretty easy, next I'll load it full of simulated gear and try it again but with a better set of wheels and dolly setup. I feel confident that 18' will pull pretty nicely too.

The folding feature I have several ideas at work for. My square aluminum tubing ideas will happen after my laminated ply models prove what I'm trying to do. Again, the prindle will be doing all the proof of concept work. Heck, it might even do the my first ufc and ec races, though I got great testing grounds in my backyard for testing.

and for going up the narrow sections of the St. Mary's river I'll have to be in the full folded mode to get thru. When folded I'll be as narrow and only a bit taller than a expedition canoe, and maybe presenting a smaller footprint overall as they are usually setup as a trimaran and have to disassemble and somehow stow it all.

As for the rigging, I hope not to use any bracing , if I can get away with it. I see in some of the biplane rigs they use bracing, so only testing will tell if I can get away with it or not.

stay tuned, I'll be sharing more videos as development progresses. I thought about doing a blog, but I think I like the forum interaction as a better way to share this design adventure. besides, I get some great feedback from you guys!