No.
For very large radius turns a BP trailer CAN actually track outside.
If, if, if IF..... the hitch ball is back far enough from the rear axle AND the distance from the coupler to the trailer axle (or mid point between axles) is sufficiently short.
I made the mistake of building a hitch one time (just ONCE) that hung WAY outta the back o' the tow vehicle.
For what I tried to accomplish at the time it worked FINE, though it had the obvious drawback of additional leverage against the tow vehicle, increased "effective' tongue weight, increased effect of side sway, etc., however it DID push the trailer out on slight turns.
I've often want to say this in a thread, now I have an excuse; "Do the geometry"
(-:
I'm sorry? Didn't you describe a situation wherein the truck-axle-to-ball distance is longer than the ball-to-trailer-axle distance? I excluded such a condition.
I was NOT proposing a hitch ball farther from the truck's rear axle than from the trailer's axle (or axles mid point) - - and in any case that is not how the geometry works (-:
As I said, "Go figure" or "Go do the geometry".
Oh I think I see what you mean. You're saying that the ratio of distances doesn't have to be as I've described, but that if they're close, and the turn radius is large enough, the trailer can track outside. Okay that's true. Allow me to restate it clearly in the context of the arguments made in this thread:
It is indeed possible for a bumper pull trailer to track outside the towing vehicle in turns with such large radii that it is not a useful point to make when discussing the virtues of various trailers as regards their maneuverability in tight quarters.
Have I stated it accurately now?
xtn