who makes these ultra-light trailers/wheels and are they highway legal?

The below Lean Machine pic is reference #32 there, see also reference #30.

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Oh, reference #30 turns out to be a dead link for me: "General Motors Three Wheeled Cars" GM's Lean Machine (3-wheelers.com/gmlean)

Maybe that info is still floating around here: http://www.3wheelers.com/

 

Thanks, my internet skills are poor as benefits an old curmudgeon.

I used to haunt those sites, hopefully someone added this info.

My desire to build a 3-wheeler was focused on the Lean Machine or derivative (my derivative)

 

So, anyway, boat with built in trailer...



Could use a bit more "add" to its adhoc in the wheel well department.

 

The tires are way too small, too inefficient.

 

I've pondered that for a relatively light low-draft Bolger-esque river/lake cruiser four or more (depending on size) of the sort of retractable landing gear used on Grumman aircraft ...

Reference picture:

... could be used in conjunction with an electric winch (and any suitable securing point) to produce a craft able to transition to land without tearing up a beach etc. Not necessarily powered on land. My thought was that with a simple set of guide "rails" (to a pin steering mechanism) made of simple pavers a sort of marine railway could be made, allowing the boat to the stored on land and launched at will: using the slope of the land to launch as you let out the winch. And of course the boat could be towed short distances to and from boat ramps ... stay to get around obstacles like the dam at Lake Livingston of the Trinity (allowing navigation to and from the Gulf).