Hmmm, that’d be fun in Lunnon eh. I mean what with all the gusts from passing busses and the like you’ll be getting downdrafts and eddies from all over the place, and it’ll not go upwind very well, which means extra drag whilst peddling into wind and any effort peddled greater than windspeed will mean it’s trying to work in apparent wind mode, which means you’ll be peddling faster than windspeed and the sails trying to work going “into wind”.
So.. it’ll work whilst broad reaching and running, anything else’ll be hard work.
And..
You’ll fall over if you get a gust from anything in the 45-70deg angle, which means you’ll get squished by anything following you.
Could be ok for the beach, but then there’s something else for that isn’t there….