Tailswing

The authorities provided the boats, and Smalley mounted machines on them that could dredge and clear weed, working in shallow waterways under low, narrow bridges, unhindered by a counterweight tailswing.

The tailswing radius may encroach over an active traffic lane or face interference from an obstruction.

Still, spookiness is a contextual matter, and with a zero-tailswing excavator to clear a larger patio, there'd be nothing to stop an enterprising self-builder taking advantage of the fundamentally sound Cotswold stonework to knock up an attractive, if isolated, starter home or holiday cottage.

...they wouldn't be able to employ the 911's tailswing characteristics with the neutral handling 914/6, and none of them challenged the Alpine Renaults for outright supremacy.