I have a question:
(and the answer may be pretty basic)
We all know that you can't land a gyrocopter in a crab angle because you
might tip over. Why, then, don't they use castor type wheels, or some other
wheel setup where all wheels can swivel in any direction? I think that this
would allow the craft to roll in the direction of the momentum preventing
tipping over, but would it completely eliminate handling on the ground?
Could the rudder alone be enough to steer on the ground?

-Just wondering