I've been thinking about this lately, and wondered about the hidden agenda in Hidden Agenda's first post in this thread. To wit: Forget about two engines; how would two-pilots work? Would safety be improved by the addition of a second pilot in the aircraft? Contrary to what Hidden Agenda asserts, a second engine is not a "proven" safety device when you look at the accidents that have already occurred.
Sure, another pilot would require a bigger helicopter, probably a twin since there aren't that many singles with big enough cabins. ...And who'd want such a twin unless it had IFR capability...and of course Cat A performance...and an autopilot... You see where the discussion goes pretty quickly.
But didn't the U.S. Army used to fly two-pilot IFR in those old single-engine Hueys? I mean, it may not be the most neighbor-friendly aircraft around, but supposing we migrated back to the "Super Huey" or 210 or something?