AH planes don't work properly with the wheels vs ground interactions. It seems you can actually pivot around your center (of the plane) rather than around the wheel-touches-ground points. For example, you cannot replicate the B-17 backup manuver of locking one wheel and then revving the engines on the same wing up to "walk" the plane backwards. Instead you just pivot about, rather than actually walk backwards.
That, in my opinion, is why in a twin-engine plane with 1 engine out/off, you cannot taxi properly because the friction vs the ground and the direction the wheels can roll isn't there to keep the plane rolling straight. It's really not "that" big of a deal, but it's annoying when it rears its head.
With 1 eng out unless you land on the runway you'll almost never be able to taxi back onto the cement to tower out safely. I stopped doing that years back (opting instead to turn both eng off rather than land with 1).
P.S. That's also why wind at ground level doesn't work properly IMO, the tires just don't work right so you go skidding when in the real world they keep you on a straight (straight-ER) path with a crosswind.
