Sail bike!

[ufkacbln]

I'm missing something. What's the difference between those and the land-yachts that I was playing in over 20 years ago?

Sorry - couldn't resist that.

The difference is that these are fully functioning recumbent trikes whereas land yachts are normally wind based propulsion only.

A hybrid if you like

 

[Norm]

Hmm... so, depending on how you built your land yacht 20 years ago, not much