"Sand Yachts need stability"........ rubbish they will tip whist standing still ... they are to do with sailing and the pilots abuilty to tack ... one wheel at the front for ease of steering with your feet (would love a go) ............ did you say reliant convertible ? this sounds like one of the stupidest ideas ive ever heard , you can not talk three wheelers and exclude morgans because they got it the right way round (and they will tip) or state one wheel at the front is good so long as you never brake on a bend
some times round here I do and don't want to end up on the roof sliding into the oncoming traffic ( left hand bend) " BUT I WAS driving when three wheelers became popular ".............. you must be very very old ........ I think you mean cheap ...... I have had a few myself and admit a 2cv based Falcon (o dear) even this was a very stable car compared to my reliant ...... I do like old tractors and ended up with a fordson major I needed one to tow a boat onto the beach Abersoch north wales happy days did a lot of sailing , merlin , lazer , mirror (great little boat ) last one fire ball .