Hi welcome to the forum
I would guess its possible but I think it would be excessively twitchy much like a forklift rear steering
very manoevrable but scary at speed
Not sure why you would want to do this do you have a particular reason?

I cannot seem to find an image of it, but on Scrap heap challange, (some time ago) there was a land yacht challange.
In this episode there was footage from about the 60's, I think, of a commercially made yacht with rear wheel steer. It basically consisted of a circular frame, and two wheels at the front and a single rear wheel. I should point out that most of the footage was of them capsizing and hurtling the occupants onto the sand

tonyUK said...

hi again, i was just curious,but was was thinking of 2 wheels at the back with the whole wheel axle assembly rotating on a central bearing,pivot, then castor wouldn't be a problem would it?.as i said,just curious.....T..

No, but hitting any form of resistance would be!

Remember back to billycart days when one front wheel would hit something, instant steering input